Mercury 50 hp 4 stroke fuel problems. co/mnhog/function-reprint-settlement-edc-bca.
Voltage normal. Mar 16, 2014 · Re: 2006 mercury 90hp 4 stroke efi fuel issues please help!!!!! Drain as much of the remaining fuel as possible from the tank; Change the fuel filter. Reconnected the fuel line to the VST and maybe got 1-2 pumps until it was pressurized again. The computer will log fault codes for nearly all possible senarios. i'm still having the same problem at full throttle, every now and then it feels like the fuel is shut off. Also, There are micro filters on both the high pressure fuel pump and pressure regulator in the VST that get clogged. Enhanced fuel injection (EFI models) for boosted efficiency. Launch and run the rpms up and down under load Sep 22, 2010 · Fuel Systems; Sacrificial Anodes & Zincs 50 hp 4-stroke not charging (Mercury) Thread starter goodinga; Start date Sep 21, 2010; G. 0 mm). Engine in the water in neutral can rev up past 5K with no issues and while in gear in reverse past 5K with no issues. The mechanic told me that one of the cylinders was flooding at idle and when the engine was turned off, but he said that if I wasn't having trouble cranking that I shouldn't worry Jul 21, 2008 · Hi I posted a problem that I was having with my 1983 90hp Mercury outboard engine about one month ago. Many people think that idling around is easy on a four stroke when it actually is the worst thing you can do to your motor. These voltage regulators are in stock and ship out the same business day if ordered before 3PM Eastern - after 3PM they will ship out next business day. fuel problems Re: 2008 25hp 4 stroke. Checked compression - OK 9. Runs smooth under 3800 Just replaced both ignition coils, spark plugs and fuel filter Mechanic's Assistant: Sometimes things that you think will be really complicated end up being easy to fix. 4. Connect your fuel pressure gauge to the pulse hose. So, how can you fix Mercury 60 Hp 4 stroke problems? Mercury 60 hp 4 stroke can face fuel problems. And a total commitment to corrosion protection utilizing hard-coat anodizing and a superior multi-step paint process. Had 2 shops diagnose the problem both said Fuel Module and wanted $2,000 to fix it. Yamaha outboard not charging battery Aug 7, 2011 · Re: WOT problem/ fuel system issues: 40 hp mercury, 2 stroke, 4 cyl- 1990's got a new / old pair of WMA carbs of ebay, cleaned them up , rebuilt fuel pump, changed all fuel lines to ethonal standards ( thanks Obama) and it runs great in the driveway. But when I stop and it sits for a while, have to re-prime with bulb. You have places to go, and the Mercury 40 to 60hp FourStroke family of outboards is the easiest way to get there. FourStroke technology and Mercury. Jun 11, 2014 · Mercury 6hp 4 Stroke Fuel Flow Problem. Make sure of the integrity of the fuel lines around the VST to insure NO air leakage. Engine fuel filter look good/clean - engine fuel lines in good shape with tight connections. Sniff the fuel tank, and replace the old fuel with a fresh batch if it smells stale. Rugged durability. View and Download Mercury 50 4-Stroke manual online. Any ideas on what may be the problem? Reason for this leak? Attached are pixs of the Vent and overflow tube Testing a suspect ENRICHENER - one video of a series on maintenance of a 2001 Mercury 60ELPT4S outboard motor, newly acquired, with an unknown maintenance h Jun 19, 2013 · Have a Mercury 40hp 2-stroke 2005 motor. First of all I don't think this is normal. May 14, 2019 · Odd, I thought. Also took low pressure fuel pump apart and clean. Sep 18, 2012 · Re: Fuel System Issues after storage Mercury 115 h. Dirty fuel filter - Replace fuel filter. Runs fine at full throttle. Changed fuel filter 5. Nov 16, 2006 · Fuel in the oil is the enemy of four stroke outboards. Here again we see another of the long-term effects of ethanol in motor fuel. Start with no-worry reliability. please let me know as I am having the exact same problem. Mar 6, 2004 · Finally they dialed into a carb problem (I thought this was it from the start but they didn't listen) and rebuilt all 4 last year at considerable expense. More low-end torque for excellent acceleration. It is essential to check the alternator, wiring, and voltage regulator to ensure they are functioning correctly. sounds like fuel system issues. 7 kW) at 5750 rpm. fuel problems i,m sorry was refering to carb but if you have restricted flo to the fuel rail i,m not sure about this set up but the may be a fuel sensor or fuel regulator that is not opening i,m sure someone with more knowledge of this system will help you in more detail The fuel filter plays a crucial role in ensuring that your Mercury 2 Stroke Outboard motor receives clean fuel, free from contaminants. On-board digital monitoring that protects your engine. Another problem it faces is carburetor buildup. Jul 1, 2023 · Preventive Maintenance for Mercury Outboard Not Reaching Full RPM (Note: This section highlights preventive maintenance tips to avoid issues with your Mercury outboard engine. I think my fuel pump is dying and I just need some confirmation/help from the pros. Customer: We have a 2006 Mercury EFI 4-stroke. Clean them or replace them if needed. However, once its turned off for an extended period of time, say 30 minutes, it starts fine but runs like crap. Electrical Gremlins: Problem: Dim or flickering lights, dead batteries, malfunctioning gauges. However, like any mechanical piece of equipment, there might be problems … Mercury 40 HP 2 Stroke Problems Jul 8, 2020 · I have a 2008 Mercury 4 Stroke (Serial # 0R241050) that is having some sort of High Pressure Fuel Pump power issue I think. When installing a new fuel pump in the Mercury 60 hp, Make sure the pump seal isnt hitting the float! Thanks for watching! e mail mrswimmingbear@gmail. Its starts easy when using Starter Fluid but isn't getting any fuel to keep it running, Looking for an easy way to troubleshoot the fuel system. I've tried various things like no Jul 5, 2008 · Re: Mercury 2007 90HP 4-Stroke EFI Fuel Problem ETHANOL> get used to it> change all fuel hose>I know this is old but> It happened to me 2 times> We solved it in testing for 2 months> my motor is 2007,115-4stroke EFI> in the fuel module is a vacuum hose to the fuel regulator. 56 in (65. a good filter may prevent other fuel problems. It keeps stalling so I've replaced the fuel hose, fuel primer bulb, and the gas tank to ensure no leaks or holes that may b … read more Jul 23, 2022 · So, what are the bad Mercury outboard fuel pump symptoms? Sputtering while igniting the engine is the most common symptom for it. Using a high-quality 10-micron separator can solve the issue. Known for their reliability and performance, these engines have become a popular choice for boating enthusiasts worldwide. The Mercury 75hp 4 Stroke is an engine system that provides maximum performance, power, and reliability. Will never buy a 2 stroke again for an outboard. Jun 24, 2024 · Mercury 50ELHPT 50 HP 4-Stroke Outboard Engine. 9 hp range, having a larger 4 stroke is so nice. Nov 19, 2023 · The issues with the Mercury 50 HP 4-stroke outboard engine are with the fuel system, spark plugs, oil, and more. Boat runs for 20 minutes like a champ. The motor Jun 4, 2023 · The world of outboard engines is vast and filled with numerous brands and models, but one that notably stands out is the Mercury 40 HP 2-stroke engine. thanks in advanceBARNICAL BILL Aug 27, 2021 · I have a 2006 Mercury EFI 4-stroke with about 400 hours on it, and it's in great shape (when it runs). ON THE WATER. Mercury Marine, based in Wisconsin, has been making Mercury outboard motors in two- and four-stroke versions ranging from 2. The dealer is just starting to look into the issue. Apr 3, 2015 · I have a 50 HP 4 stroke (EFI) Mercury motor on my 2005 Manitou Pontoon boat. Symptoms of Mercury Outboard Power Trim Problems. 4-Cylinder; Propshaft: 50 HP; Engine Type: 4-stroke; Standard propeller: Not included; Pros. Changed spark plugs and has new gas going through it. Kit runs about 20 bucks and is easy to put in. Aug 27, 2013 · Get a fuel pressure gauge and connect it to the fuel pressure port. Cranks but no fire. It has had a problem for about a month with starting. 9 HP Sailpower, XR10/MAG 10/Viking 10 Mercury Sea Pro/Marathon 10 Mercury 15 HP May 11, 2021 · There was fuel but my guess was 1 maybe 2 oz of fuel maximum. Thanks for watching! email me mrswimmingbear@gmail. Nope. I have come to find mercs suffer from several issues Aug 3, 2023 · If you have some time, please check a comprehensive guide on Mercury 75hp 2 Stroke Problems, that I covered a few days back. Oct 21, 2019 · The drain screw is also magnetic; check it for shavings that could indicate a gear problem. I figured out my high pressure fuel pump is bad. There have been a few instances where at certain RPM's engine harmonics and vibration have shorted inside the starter motor, and caused it to engage the flywheel Sep 14, 2012 · Mercury 4 stroke fuel problems #1 Post by pote » Fri Sep 14, 2012 Tahoe 24' Fish-n-Fun Tritoon, with Mercury 115 HP 4-Stroke "Trine SS Cape" (Trying 2S Cape) Nov 19, 2023 · Common Mercury 75hp 4 stroke problems. Jan 3, 2011 · Re: Starting Problem with 40 hp 4 stroke EFI I would take a fuel sample out of the Vapor Seperator Tank. The problem I am having has occured on three different occassions with all being in 50 and below weather. I can turn the ignition on and get 42psi at the VST schrader valve. Mar 15, 2010 · Re: 50 hp mercury bogging down ok. Finally, unless you have the computer software and other equipment required to work on a four-stroke fuel injected engine there is not much "electrical" diagnosing you can do. and exact same results. Is any one else experiencing these problems? This fuel pump fits the Mercury 50HP EFI 4-Stroke Outboards (All Years and Models 2006 and Newer - if yours is 2001-2005 please see details below). Normally this engine runs great,could Aug 12, 2017 · Hi all Was out on the boat yesterday and when I had it full out the engine started cutting out. Aug 18, 2015 · I have an opportunity to buy a 2007 Mercury 4 stroke 90 HP EFI. Impressive torque. 8 / 995; Full throttle RPM: 5000-6000; Fuel induction system: 2 valves per cylinder, single overhead cam (SOHC) Alternator amp / Watt: 18 amp / 226 watt; Recommended fuel: 87 octane / up to 10% ethanol; Recommended oil: Mercury FourStroke 25W40 Marine Oil; Engine protection (Applies to 4-stroke Mercury outboards with 10, 15, and 20 HP engines. Nov 10, 2023 · You made up your mind to go fishing with your boat. Wait five minutes and pump a little more in to ensure it’s filled to capacity. a lot of time and $$$$$. I checked the fuel line from the tank to the engine and everything checked out. Solutions. Temp normal. Jun 5, 2014 · I've got a service manual and a subscription to Seloc On-line. Mar 29, 2011 · Re: 2008 Mercury EFI 4 stroke Fuse Issue I know this doesn't sound like it makes any sense, but check the starter motor and battery cables inside the cowl for signs of heat damage. Please call 1-800-BOATING with your outboard’s serial number to confirm one of these connectors is right for your application. com Apr 18, 2011 · Re: 2008 25hp 4 stroke. Checked spark plugs - OK 8. 83:1 gear ratio. Fuel breaks down over time and goes bad. The cure is a matter of diagnosing and cleaning the element although in some cases replacement is required. At the time I could not see code so I took it home. I discovered that when I prime the engine with the prime bulb that I will get a stream of fuel from the lower carp to the upper right screw hole or Main Fuel Jet hole I think. The symptoms:-Typically starts fine, idles great-P. said it runs fine under load, could'nt test that myself so far Aug 4, 2023 · Erratic idle speed is a common issue that might affect the Mercury 40 HP 4-Stroke engine. Make sure and run them wide open often. It would start fine at the launch but sometimes seemed like there was an ignition coil problem at idle speed while under power. But if this motor has set for two years I would bet that the electric fuel pump is seized up. Power trim and tilt; 18-amp alternator; SmartCraft ready; Water-cooled; EFI (Electronic Fuel Injection) 3 gears (forward, neutral, and reverse) 3 years warranty; Cons. Causes rough running, especially at idle. They installed a primer bulb so I can keep it running at idle. Symptoms Hawkeye MarineServiced my fuel pump on my Mercury 50 HP outboard engine. If the gas is stale and smells varnished you might want to drain it and fill the fuel filter with qickkleen or ringfree and prime the bulb with a fresh portable tank of gas and let it sit over night with fresh gas in it. When you turn the key to the run position, you should hear the electric pump hum for about two seconds. Readings below this point to a bad diaphragm or pump check valve. Then, it slowly slows down and dies. Spits and sputters over 3800 rpm. Wrong fuel grade - Change gasoline. Checked injectors - OK 6. Fuel is pouring out of the vent tube in the lower unit coming from the Vent assembly. Installed an inline fuel filter between the tank and bulb 4. Some nice fella said to clean my carbs and the problem went away. In this blog post, we’ll explore common problems associated with Mercury 2-stroke outboard engines and provide detailed, step-by-step solutions for fixing them It’s simple. I pulled to shore and noticed a small gas slick. Also for: 40 4-stroke, 60 4-stroke. Turned out there is something wrong with the fuel injection/ECM. Jul 29, 2007 · That's just one of consequences of the 4 stroke outboard. 95 in (75. Problem 1: Fuel-related issues. With boater-driven innovations and technologies. thanks. Then the other weekend I had the boat loaded with people and it seemed like it did not have a lot of power. Water will destroy any moving parts or motor especially on an outboard motor. Easy starts, quiet and much better fuel economy. Checked injector coils - OK 7. Jun 11, 2014 #1 Sep 9, 2019 · Hey Guys, I have an issue with my 2006 Mercury 50 HP EFI 4 Stroke motor that I can't figure out and either can the mechanics I brought it too. Runs great at high speed, runs about 10 minutes at idle then sputters and dies. Fuel injector cleaning may be necessary. The injectors should be cleaned every couple of years no matter how many hours are on themsitting is worse than putting a 1000 hours on that motor. May 2, 2015 · I own a 2006 50 HP Mercury 4 stroke EFI Outboard. One of the most frustrating problems with the Mercury 40 HP 2-stroke is when the engine suddenly shuts down after starting and running for just a few seconds. Fuel pump and line pressures are needed. *The ACU does not use the TPS, so this is only applicable to Mercury ECUs. There are plenty of good reasons these outboards rule the water. You've got a faulty fuel pump diaphragm. Jun 16, 2019 · Bought a new to me boat, 2010 Legend 16 XGS with a 50HP 4 Stroke EFI engine and here's what is happening. Mercury 50 HP EFI FourStrokes is an engine to run an outboard motorboat. It had been stored for about a year and it had ethanol fuel in it. Faulty Spark Plugs: Inspect the spark plugs for any damage or excessive carbon deposits. restrictions can be fould by moving the tee back to the next connection poit on the fuel line. if you donot have one, it may be a good time to have one installed. 55m alloy runabout in combination with a 13in alloy prop, the demo Mercury F50 provided plenty of power and good holeshot performance for a two-adult load and total displacement of 680kg. Sep 6, 2011 · wrd1972 wrote:The Mercury 90hp 4 cycle EFI motor starts great cold and runs strong without issue. Fuel filters require initial 100-hour maintenance as Jul 19, 2012 · Re: Mercury 115 4 stroke efi fuel injection problem I may be to lat to answer. It’s everything you need to get more out of your time on the water. The engine is mounted on a Tracker Super-Guide V-16 in case it matters. Value – The 60 hp Command Thrust matches the acceleration and fuel efficiency of our competitor’s more expensive 70 hp outboard About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright HP / kW: 50 / 37; Engine type: Inline 4; Displacement (CID/CC) 60. Oct 26, 2013 · The Shop Manual has a lot of information on the VST and the High Pressure Fuel flow in general. Nov 10, 2013 · Re: 4 stroke - Gas in Oil. I took it home and the following weekend I serviced the following: Low pressure fuel pump (took off tested pressure), changed oil and filter, changed lower unit lube, replaced thermostat, replaced both fuel filters, removed the lower unit and replaced impeller and had a buddy test my battery voltage. one is a fuel system vacum check, T a vacum guage at the ful pump inlet at WOT the system vacum should be 1-4" Hg, if less than 1 look for an air leak if more then 4 look for a restriction. May 30, 2023 · Mercury 2-stroke outboard motors are highly regarded in the boating world for their reliability, performance, and efficiency. Mounted on an old 4. Thread starter southplank; Start date Jun 11, 2014; S. The engine has 240 hours on it and the problem started occurring at about 170 hours. It seems to act like its out of fuel. Dec 29, 2014 · Spark intensity on all cylinders must be up to spec. but Dec 17, 2011 · Re: 1998 50HP Mercury four stroke starting issue i have a 60hp merc and it did a lot of the same things. While Mercury is widely known for building top-quality outboard engines, it can be assumed that some users can … Mercury 90 HP 4 Stroke Problems: Troubleshooting Customer: I have a 1999 50 hp mercury bigfoot 4 stroke and i believe it is having fuel problems. Replaced both pumps and float checked hose and cleaned regulator, flushed out injectors and rail, new filters. When refilling, gear oil must be pumped back in through the drain hole until it comes out the vent. Family engine 3m9xm. I removed the Fuel Module and replaced the Lift Fuel Pump and the Float Shutoff. Once going it is generally fine. However, like any mechanical device, they can occasionally encounter issues and require troubleshooting. Yamaha, Suzuki, Honda and Mercury four-stroke outboards are the most susceptible. Mar 6, 2008 · Re: 50hp 4 stroke fuel starve two things ya gotta do. I stopped to fish a spot for about twenty minutes, started my boat up. If we squeeze the primer ball on the fuel line it fills the fuel filter cup, we start the engine and let it idle, the cup drains and engine stalls. Mercury 50 EFI Specifications. However, it seems like your Mercury 50 HP won’t give a start. Air in the fuel pipes - Bleed the fuel pipes. Aug 4, 2013 · I have a 2006 Mercury 25 hp 4 stroke EFI on my Craig Cat. Seems E-10 can cause the edges of the older ones to curl up and cause that problem. Faulty Fuel Injectors: Either dirty or flooding fuel injectors. Feb 9, 2024 · I have a Mercury 25 HP EFI OR106999 (1A25203FK) & Up Fuel Problem, had the Fuel Injectors remove and serviced, replaced the Fuel Pump. Crank the engine. Sep 4, 2015 · I have changed the plugs, fuel filter, oil, checked the pick up tube screen in the gas tank, added water remover and fuel injector cleaner to the tank and sprayed a can of fuel injector cleaner into the throttle body while running. 4 stroke fuel problem? I have a similar problem with around 2000 or 2001 40 hp 4-stroke motor has had carbs completely gone through fuel pump seems to have good pressure. o. Since the problem seemed to be linked to overheat, I replaced also cooling water impeller, tested the cooling water thermostat. i would be concerned with a merc with a lot of yam parts or a yam with a lot of merc parts on it! there is no need to ever do that other than some back woods hill billy trying to take 2 broken engines to make 1 that works with out spending a penny! you realize you will probably never be Dec 6, 2010 · Re: Mercury 115 hp 4 stroke fuel pump problems Always include Model,Serial # and HP. Engine starts and will run at idle with no issues. The engine is a 2017 Mercury 150 4-stroke mounted on a Tracker boat. J The Mercury F50 outboard motor has a dry weight of 112kg and a 1. serial# 2b216590 Engine quite while running on plane. 9 HP Mercury 9. We are having serious problems with fuel in the oil, oil level rising, engine failure due to lack of lubrication of #1 rod end bearing. Sorry for the long story here, but it's a lot to explain. The major problem I was having was that after running engine May 20, 2011 · I've got a 3 yr old Mercury 25hp EFI 4-Stroke. Symptoms The engine sputters or stalls during operation. Watch how I discoverd the problem. My engine started up no problem and ran with muffs no problem but under power the engine would stall when engage. com This voltage regulator fits the Mercury 50HP EFI 4-Stroke Outboards (All Years and Models). I pulled the code and it was a fuel pump fault. Since I've ran it I've only used 91 octane alcohol free fuel with Star Tron Marine Fuel Treatment. So, what are the Mercury 50 HP 4 Jun 10, 2023 · The Mercury Optimax 115 is a popular outboard motor that is known for its reliability, fuel efficiency, and outstanding performance. In this guide, we will go over some potential problems that could occur with a Mercury 50 HP 4-stroke outboard engine and ways to fix them. Every time I take it out since last fall it does the same thing. The Mercury 50 Bigfoot is a 4-stroke 4-cylinder OHC (overhead camshaft) gasoline outboard engine with a rated power of 50 hp (37. Check the leads. Electronic fuel injection for reliable starts and increased efficiency. This could be due to fuel system issues, air intake problems, or the engine control unit (ECU). Customer: 2001 Mercury 50 HP 4 stroke Big foot. It was ok for 4 trips then started acting up again. Replaced the high pressure fuel filter cleaned out the fuel injectors and took the VST apart and cleaned out. As I was on holiday I didn't have the tools for fixing it myself and had it looked at by a local mechanic. Normal fuel pumps will put out between five and seven PSI. Has already told me once he could not find any issues but when I ran it a few hours later the problem came back. After realizing what was not working I began to look into it. It is manual pull start, no battery attached, tiller version. Jan 16, 2021 · I wrench quite a lot on outboards and love the challenge, so I bought a Tohatsu/Mercury 30 hp 4 stroke, which the previous owner said just needed servicing. Injectors cleaned. Faulty or Incorrectly adjusted Throttle Position Sensor (TPS): On some Mercury motors, the TPS calibrates fuel delivery up to about 3000 RPM. The motor is electric start and when I go to start it in the morning I have to video showing service procedure for mercury 4 stroke outboard fuel supply module, consisting of high and low pressure fuel pumps, float switch, and presuure Jul 25, 2013 · Re: 2006 50HP 4 stroke EFI Rough cold idle and surging (and stalling) at low rpm Hi Milton . However, there are simpler explanations for why you’re seeing rising temps in your engine. Increased fuel economy and outstanding overall performance. Don’t forget to treat the new fuel with fuel stabilizer to keep it fresh for as long as possible. I brought the boat back to the dock and added some Apr 28, 2021 · That can be any one of the below items (or a combination of any):-No fuel in tank-Pickup Tube cracked/pin hole-Restriction in Pickup-Vent for Fuel Tank not working properly-Anti-Siphon Valve (or Fuel Demand Valve)-Primer Bulb or Fuel Line-Fuel Filter(s) restricted-Mechanical fuel pump not functioning properly *-VST needle/seat/float problem Jun 13, 2010 · Re: mercury tracker pro series 40 hp fuel problem Could be the fuel pump. Sep 17, 2015 · 1. Turnkey starts / fuel efficiency. S. Most of the May 27, 2005 · Re: Mercury 40 H. ) Fuel Stabilization: When storing your boat for an extended period, use a fuel stabilizer to prevent fuel degradation and potential clogging in the fuel system. hope the repair shop gets you going! yamaha recomends a 10 micron pre-filter. We are not getting fuel from the tank to the outboard. This has led me to do my own research. 5 to 350 horsepower for more than 75 years, though the company's first motors did not have as much horsepower as some of its current motors. Our flat rate shipping is USPS Priority which is 2-3 business days to most of the U. Last summer I started having problems with the engine. Turn on the key and see what initial fuel pressure is, start the motor and read pressure, speed up the motor and watch fuel pressure. engine starts and runs if you give it some throttle, fuel psi is 42-44psi. If you have a two-stroke outboard motor, you must add oil to the fuel to May 26, 2003 · Re: Merc 4 Stroke - Gas in Crankcase I have a number of 2001/2002 Mercury 75/90/115 4 strokes. I began to have a problem with fuel pressure last summer and now have had 4 new fuel pumps installed @ a dealer. It seems like there is no fuel getting into the VST when it gets hot. I checked compression (each cylinder was 120 psi), installed new plugs (gapped correctly), installed new fuel bulb, new battery, and have removed, installed new fuel filter and gas/water separator and removed and cleaned all three carburetors. Changed fuel hose assemby and both connectors 3. Sep 23, 2009 · Re: 60 hp Mercury 4 stroke EFI fuel delivery issues I've got the same motor, purchased last year from a certified Merc technician. Oct 29, 2018 · I'm at wits end with this fuel problem. On a 2 stroke if you dont do this the gas evaproates and leaves the oil in the bowls. The "Certified" Mercury mechanic said it could be anything. Merc has a TSB out on it and their kits come with newly designed check valves. southplank Recruit. Oct 24, 2009 · Re: 2005 115 Mercury 4 stroke power loss. Symptom: Motor runs great most of the times, however it intermittently begins to miss and sputter. In the case of a mercury 60 hp 4 stroke engine not charging the battery, the reasons can be similar to the ones mentioned above. with 4 strokes it empties the carbs (run dry in the water to avoid burning the water pump impeller) if there is any junk in gas and left in carbs it will accumlate. – Mercury Electronic Fuel Injection (EFI) delivers reliable turnkey starts, improved fuel efficiency, instant throttle response and protection against low-quality-fuel problems. Hooked it back to the computer again and the CDS did finally show a fuel sensor alarm. Fuel tank is empty - Add fuel. Here are some common signs that your Mercury outboard power trim may be malfunctioning: Aug 16, 2007 · Re: 90 HP Mercury 4 Stroke Outboard Bogging at full throttle Turns out that the fuel filter was put in upside down and causing the fuel restriction at full throttle. If there is a lack of fuel discharge, you might have a bad diaphragm or fuel pump check valve. Propeller not included; Available in one color; 50 HP Mercury Outboard Alternatives Jan 21, 2017 · 2002-2005 Mercury 40 hp 4-Stroke 2002-2005 Mercury 50 hp Four-Stroke 2002-2005 Mercury 60 hp 4-Stroke 2002-2005 Mercury 40/50/60 ELPT 4-Stroke 2002-2005 Mercury 40/50/60 ELPT Bigfoot 4-Stroke Mercury 6 HP Mercury 8 HP Mercury 8 HP Sailmate Mercury 9. But will also be affected by an air leak somewhere in the system, just like the four-stroke. Tried using the primer ball again but it was still rock hard. Aug 3, 2023 · One of the most frustrating problems with the Mercury 50 HP 2-stroke is when the engine behaves as if it’s running out of gas, even though the fuel tank is adequately filled. Damaged spark plug wiring connection - Inspect the spark plug wire connection, replace or repair. If your outboard is not EFI, please see this fuel pump for the carbureted models: Mercury 50HP Non-EFI 4-Stroke Fuel Pump We also sell the High Pressure Electric Fuel Pump for this outboard, you can find that here: Mercury 50HP EFI High Pressure Fuel Pump These fuel pumps are in stock and ship out the same Jun 15, 2016 · I have the Sam problem with my 2011 90 hp mercury four stroke so far low pressure pump , high pressure pump , VST Tank ,gas line ,prime bulb, pickup tube and fuel filters still the same going back in shop tue let you know Kelvin Jul 14, 2012 · Re: 2002 Mercury 50hp 4 stroke efi problem. Makes it easier to get the right specs. Jun 5, 2024 · A kinked or pinched hose can cause significant performance problems in an outboard engine, especially at higher RPMs, while pinholes in fuel lines can introduce air to the fuel, as well as create a safety problem. It has not been abused. Most often than not, the primary cause of this issue can be traced back to the use of poor-quality fuel. HELP! faztbullet gave soom great info. P. Mar 16, 2013 · I have a 2007 60hp 4 stroke efi that keeps losing fuel pressure. Make sure the fuel line is properly connected and free of leaks. Value – The 60 hp Command Thrust matches the acceleration and fuel efficiency of our competitor’s more expensive 70 hp outboard Sep 1, 2021 · Buy GXARTS Fuel Injector Fit for Mercury Marine EFI 4 Stroke 30 40 50 60 HP Engines 2002-2012 Replaces Part Numbers 892123001 892123002 877826 892123: Fuel Injectors - Amazon. If you can't make the pump turn on then take it to the dealer. Well worth it if it fixes the problem. while boating saturday the rpms suddenly dropped from 5100 to 3500 and remains this way. Like electronic fuel injection. Sep 3, 2023 · Mercury 60 hp 4 stroke not charging battery. ) V6/V8 Mercury Outboard Fault Code Chart Fuel pump: 16: The ECU has detected a problem when This fuel pump fits the Mercury 50HP EFI 4-Stroke Outboards (All Years and Models). Always moving forward. Change Fuel Filters. In this blog post, we will explore some common problems with the Mercury Optimax 115 and provide solutions to help you troubleshoot and maintain … Mercury Optimax 115 Problems: Common Issues Apr 27, 2014 · I have a 2008 50 HP mercury 2-stroke engine. Changed fuel tank (external, 6 gal) 2. May 19, 2003 · My Mercury 2 stroke 50 hp (1988) has a continual problem starting. Long beep. They both show an in-line fuse in the schematic, but I can't find any fuse other than the 20 amp at the top left side of the engine. It is a highly advanced system, but like all electronics and computers, there are times when problems occur. When in the water, it can sometimes take 5 or 10 minutes to fire, when it does eventually turn over it is totally choked up, and takes some time to clear itself. What you can do is check the fuel system. being that draining the carbs last week fixed the problem, i was thinking that it was fuel and not electric. Problem 1: Engine Dies After Running for a Few Seconds. Jun 27, 2022 · Mercury 90HP 4 Strok EFI 2011 (90ELPT 4s Ser # 1B897873) - Fuel in Oil Good afternoon, After doing some google searching I stumbled upon your site. The fuel pump is powered by a push rod from the camshaft, and a rip in the diaphragm will allow fuel into the rocker cover on the cylinder head, where it mixes with the engine oil and returns to the oil sump. Last year the motor quit on me and the Dealer diagnosed a bad ECU unit. goodinga Recruit. Never died but lost power. Oct 21, 2019 · Hi everyone, I am new to this forum and am having some issues with my 2006 Mercury 25 hp 4 stroke efi motor. A clean fuel system ensures optimal engine performance. Then switch the tester to the ground and make sure it tests ok. Nov 27, 2011 · Mercury 4-Stroke 50 HP EFI fuel pump problems I have owned this motor for about seven years only use it for crappie and ducks. You turn on the key it should have power to the pump. I checked all the spark plugs they look great,i replaced fuel filter. Background: I got this pontoon/motor last year and it ran fine up until now. This is because, in the two-stroke, the oil is mixed into the fuel, which lubricates the cylinder walls of the engine. Jun 24, 2002 · After replacing the fuel bowl gaskets and the screw gasket for the upper and lower carb on my 1982 Mercury 50hp motor. Jun 1, 2011 · Re: Mercury 25 hp Bigfoot Fuel issue I also got similar problem with my 2006 four strokes 25 HP Bigfoot. the fact it will start but bogs when you try to go indicates an issue with the automatic cold start enrichment or a leaking needle valve. May 14, 2008 · Re: 2002 50 HP Four Stroke problem If this truely is a 4-stroke EFI, there is not a choke. Also, after re-priming, if running at slow speeds, looses prime. May 23, 2017 · Hey guys, I have a 2009 50 HP Mercury 4 stroke EFI on my Bass Tracker Pro Team 170 TX. I can run the motor for anywhere between 1 minute and 1 hour at normal speeds under a load with no loss of power and then the fuel pressure will drop to 5 psi then start bouncing between 5 and 30 until the motor Dec 26, 2015 · Good evening folks! I have a 2012 40HP EFI mercury 4 stroke (SN:1C182311) with probably about 500-600 hours on it (the dealer told me 377 about a year ago, so I'm guessing on the hours). Any luck with fix on your MERC issueseg mid range stalling. 0 mm) and piston stroke is 2. Put about 10 gallons of fresh gas in the tank; Add a full can of SeaFoam; Start and let idle for at least 10-15 minutes. Fuel System: Inspect the fuel injectors and the fuel pump for any blockages or damages. One thing he said was that he replaced the fuel pump, even though it ran fine, because fuel pumps in earlier EFI mercs (which he included 2002 model) had a problem where after 4 or 5 years of use developed a problem whereby the shaft in the fuel pump had a tendency Apr 26, 2008 · Re: 2006 50hp EFI 4-stroke fuel problems No ideas at all? Surely with all the experts here someone has at least 1 idea. I have recently started having a very strange issue shaking/ sputtering issue with the motor, that all began a little over a week ago. However, like any mechanical device, it is not immune to issues. Went around to the back of the engine Feb 7, 2010 · Re: 2005 Mercury 25 hp 4 stroke fuel problem by opening the throttle plates your allowing more air into the intake to manually compensate for an over rich air fuel mixture. The 90 HP 4-stroke Mercury engine is one of the popular choices among boaters looking for an efficient, reliable, and powerful engine for their vessel. The fuel system can suffer from contamination and blockages, leading to poor engine performance or stalling. If the pressure ever reduces then there is a problem. The Mercury 50 EFI is a four-stroke four-cylinder overhead camshaft gasoline outboard engine. for Fuel injection the fuel injection pump is in the fuel module on mine. (103 degrees on lake) Could it be getting hot and vapor keeping fuel from entering VST? Jul 2, 2009 · Mercury 4 stroke efi 60 hp, I believe the year is 2002 / 2003. Jun 2, 2023 · Possible Causes and Solutions: Low or No Fuel: Check the fuel tank and fill it if necessary. Might take the first step and buy the genuine HP fuel pump and then it should be easier to assess the actual problem and determine where I go from there. 1-mercury-2007-90hp-4-stroke-efi-fuel-problem The motor looks to be in great condition, I haven't For the assurance of a factory fitting, choose a Mercury fuel line connector. Lot of junk fuel left over in them. Joined Aug 12, 2013 Messages 5. Aug 17, 2008 · Re: 2003 mercury 50hp 4 stroke EFI First the bad news, very VERY difficult to diagnose problems on these motors without the plug in test equipment. May 16, 2016 · I have the exact same problem, Mercury 60hp EFI 2006 model, i have changed the IAC , new plugs, fuel filters x 2, new thermostat and new fuel line/hand pump but no luck, next I will try heat sensor then low pressure fuel pump. Not a problem. So I bought harth drogues last month to slow the troll speed allowing the outboard to operate at Sep 20, 2013 · I've got a -97 4-stroke 50 HP mercury (4 cylinders with carburetors). Is your outboard overheating? Fuel in the cylinders is an unwanted coolant. But, the damage by an air leak in a two-stroke is a much greater risk than a four-stroke. When I get under way at full throttle, within almost exactly one minute the motor's warning light/alarm (solid tone) comes on and the motor goes into an idle mode. Under "high vacuum" from the intake manifold controlling fuel pressure. I have a vessel view mobile on it. Don’t ignore them as mere suggestions! Bonus Clues: Fuel leaks: Visible leaks near the fuel pump could indicate internal problems or damaged components. I replaced the spark plugs, fuel pump, fuel tank, fuel filter. p. UPS Next Day and Second Day Air is available during checkout if Aug 13, 2023 · Mercury 90hp 2 Stroke Problems: In-depth Guide. In this video wi Jul 1, 2023 · In this article, I will explore the common symptoms, causes, and solutions for Mercury outboard power trim problems. Our video below on why an outboard overheats walks you through the troubleshooting process to rule out the fuel pump as the culprit. has good compression and new plugs. Thanks for watching! Jun 4, 2023 · Mercury Marine has been manufacturing outboard engines for more than 75 years. 9952ge I put the boat in and it seemed to run ok. Excess consumption of fuel, an overheated outboard motor, and faulty valves are symptoms too. 50 4-Stroke outboard motor pdf manual download. Removed the fuel line to the VST and could then pump fuel freely into a container with the primer ball. sorry for your motor problems. External fuel vents can become clogged with the nest-making materials of spiders, wasps, and other insects. Over time, the fuel filter can become clogged with debris, affecting fuel flow and causing engine performance issues. Jul 28, 2013 · Thanks to member PontoonboatFun for his post date 4 Aug 2012 Engine was running real rough and spewing fuel from the air intake and after doing all the usual checks including fuel pipes, fuel filters, plugs, pin coils, injectors and air filter I came across the above post which mentioned fuel pressure regulator vacuum hose. May 29, 2018 · Hello Forum, I have a 90 efi 4 stroke Ser# 1B475763 I bought this motor knowing it had fuel issues. Mercury FourStroke engines have consistently set the bar for clean, quiet Jun 30, 2013 · Re: 115 Mercury 4 stroke problems I have a 2010 115 Merc 4 stroke with similar issues. see if your model has a fuel vapor canister/ fuel module with 2 fuel pumps in it. This summer I all of a sudden got a problem with sticky floater valves so one of the carburetors was overflowing and the engine just flooded. This unit has a low pressure pump and a VST on the side. Here comes the detailed guide on Mercury 90hp 2-Stroke. com FREE DELIVERY possible on eligible purchases In a perfect world, we want to use 100 % fuel with no ethanol. Mar 1, 2021 · 2016 Mercury 115hp four stroke. Fresh fuel should have that sweetish gasoline smell, whereas stale fuel has a sour turpentine-like aroma. Carburetor problems, such as clogged jets or float issues, can also cause fuel supply disruptions. 4-stroke This problem is really not that difficult given the fuel we are stuck with. The engine cylinder bore is 2. I drained all of the fuel out of it, cleaned the fuel supply module out, flushed the lines, cleaned the injectors, all are spraying good, installed new fuel filters and replaced the spark plugs. This engine has a batch fuel injection system, mechanical fuel pump of diaphragm or plunger type, electric start with bendix starter, and capacitor discharge ignition system. Fixes: Regularly clean or replace fuel injectors, check and replace fuel lines if cracked or leaking, consult a mechanic for faulty fuel pump diagnosis, use fresh, high-quality fuel. Any help please. Checked fuel pressure - OK May 14, 2007 · Re: 2001 4 stroke 50 hp mercury power loss!! Yes this is good practice. Nov 10, 2023 · Mercury 60 Hp 4 stroke is a reliable outboard motor. Loss of Power Users often complain about this issue after taking their outboard out of the storage unit. Clogged fuel lines - Fuel lines need to be cleaned. Jul 8, 2016 · OK, VST Cleaned. 5 to 9. . I'm looking for help diagnosing an over-fueling situation on a 2011 90hp ELPT 4S Merc. Identifying the symptoms of power trim issues is the first step towards resolving them. The boat will start if i give it throttle in N but as soon as i begin to return towards idle it will die. What are the three readings. Trouble is the genuine fuel pump and ecm are worth over 2 grand so not sure I am prepared to spend that sort of money on this outboard. About a month ago I was out fishing running up and down the lake with no issues. This is the electric fuel pump located inside the vapor seperator, if you need the mechanical lift pump, go here: Mercury 50HP EFI Lift Fuel Pump If your outboard is not EFI, please see this fuel pump for the carbureted models: Mercury 50HP Non-EFI Oct 26, 2020 · VERY intermittent problem continues for over a year, can't seem to identify the problem. Joined Sep The Warning Light Woes: Modern Mercury outboards often have specific warning lights for fuel system issues. Jun 12, 2017 · I bought a pontoon a few weeks ago with the 90 hp 4 stroke efi motor. Is the tank vent operating properly, fuel pick-up clean/unobstructed, fuel lines in good shape, water separator/inline filters (if equipped) clear. Power and ground. Nov 4, 2022 · Mercury 4 Stroke EFI Problems. The ecm controls fuel delivery. Smooth performance. Apr 15, 2023 · Even though I have had and have 4 stroke outboards in the 7. If you troll with a four stroke you need to change your oil more often not at 100 hours. Ethanol attacks the plastic, sometimes causing it to swell and become unusable. Still, it can face problems like any other outboard engine. It ensures better fuel economy and outstanding performance. Spark plug is damaged - Replace spark plug. However, it does face some problems which are frustrating. Jan 23, 2022 · Thanks Chris. It stalls after running for about 20 minutes. well, i've been told that it could be anything from clogged high-speed jet to a coil or power pack. I replaced the ECU and the motor ran great for 4 trips on the water. idles good and is good at top end but cuts out in mid range. sgpicmjrkggefhukuyjnktwsqlcqwagdgqmrgyczvepgoqmkwukzzqltw
Mercury 50 hp 4 stroke fuel problems. 9 hp range, having a larger 4 stroke is so nice.
Mercury 50 hp 4 stroke fuel problems. Once going it is generally fine.