Mercury 90 hp 4 stroke fuel pump problems

Messages. 1. Jul 30, 2018. #10. Check the fuel pump. Pull the pump out of the engine, clamp off lines to the carbs and pump the inline bulb. If gas flow out around the end that goes into the engine, you need a new pump. My 50hp 4-stroke will dump 2 quarts of gas in the oil overnight if I leave the gas line hooked up.

Jul 7, 2008. #5. Re: Primer Bulb won't stay hard. The primer bulb never really "gets hard" because the fuel pump is sucking (rather than pushing) fuel through the bulb so there is no pressure being built up in the bulb. If the bulb is getting sucked flat and such, then that is a better indication of a restriction in the fuel line.Apr 12, 2023 · Problem #4: Loss of power. Loss of power is another common problem experienced by Mercury 40 hp 4-stroke engine owners. This problem can be caused by a number of factors, including a dirty fuel injector, a clogged fuel filter, or a faulty fuel pump. Solution. Clean the fuel injector or replace it if it is faulty. Replace the fuel filter if it ... Fourstroke 90-115hp Command Thrust; ... Fuel Basics; Preventing Corrosion; ... Mercury Marine is a division of Brunswick Corporation. The 1950s Classic Mercury Cars Channel covers popular antique Mercurys from the decade. Take a look under the hood of different 1950s classic Mercury cars. Advertisement The 1950s ...Hello my name is Jason I am from Searcy AR. I have a 2010 Harris Pontoon boat I purchased brand new with a Merc 115 Efi. Four stroke This boat is in excellent condition and never gave any problems until now . I am stumped and need help . I own a automotive shop and mechanicly encluned but not a marine tech for sure .Feb 24, 2023. #1. I have a 24’ pontoon with a Mercury 90hp 4 stroke outboard. My engine info tag says that I have a 2007 90ELPT 4S. I’m working on it for a family member. My problem is that while in gear (F & R) @ idle, when I shift into Neutral, the engine stalls every time. It will immediately start with the ignition key while in Neutral.Get a Mercury 40 HP 2 stroke fuel pump rebuild kit here: https://www.boats.net/product/mercury/857005A1?utm_source=youtube&utm_medium=video&utm_campaign=desc...

7 Feb 2024 ... just a quick overview of the low pressure fuel delivery on this outboard. some terms may not be correct but gives a general overview of the ...An HP 12c is a financial calculator that can figure the time value of money problems and compound interest calculations. Compound interest is common in bank accounts and loans, whe...60 hp mercury 4 stroke loses fuel pressure after running at wot for 2 mins. Cut back to 4200 rpms and the fuel pressure comes back to 42 psi. Mechanic's Assistant: Sometimes things that you think will be really complicated end up being easy to fix. The Marine Mechanic I'm going to connect you with knows all the tricks and shortcuts.Advertisement You can now see that two-stroke engines have two important advantages over four-stroke engines: They are simpler and lighter, and they produce about twice as much pow...Car trouble always seems to happen at the most inconvenient times, usually when you are already running late or on your way to an extremely important commitment. Turning your key t...

The 1960 Mercury had a more subtle attitude than its predecessors. Learn more about the changes made to the 1960 Mercury and what engines were used. Advertisement The 1960 Mercury ...20,066. Dec 17, 2009. #6. Re: Too much engine Oil in 2003 Mercury 90 HP 4-stroke. overpropping,cold running due to defective T stat or a bad fuel pump diaphram will do it rapidly. remove the fuel pump mounting bolts,swing the fuel pump aside and squeeze the fuel primer bulb. if gas runs out of the pump actuator shaft the diaphram is bad.648. 94K views 4 years ago. In a perfect world, we want to use 100 % fuel with no ethanol. Water will destroy any moving parts or motor especially on an outboard motor. In this video will show...MERCURY - 90 (4-STROKE) - Carburetor Ref ID Description Price ; 1 : CARBURETOR (#3319-804168T08) (1/3) (90) Qty Required For Repair: 2 ... (90 HP) Qty Required For Repair: 4. $19.76. $20.58. 28 : JET, Pilot (#45) (#804871) (75HP) … How to Diagnose a Bad Fuel Pump on an Outboard. 1. Do you hear the fuel pump? When you turn the key to start the engine, before you actually hear the engine you should hear the fuel pump spinning up. If you don’t, and the engine won’t start, it could be the fuel pump. On the other hand, it could be an electrical issue. 2. 2 Year Extended Warranty + $15.99. 1 Year Extended Warranty + $9.99. Add to Cart. Details. This fuel pump fits the Yamaha 40HP F40 4-stroke outboards (1999-2007). This includes (but is not limited to) the following models: F40EJR - 2006 and Newer. F40MJH - 2006 and Newer.

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1. Loss Of Power. If your Mercury 4 Stroke EFI fuel pump fails, your engine may not even sputter, but you will occasionally lose power. For example, consider the situation when you ascend abrupt water waves in your boat and suddenly lose power. Of course, this indicates that the fuel pump is not providing enough gasoline to the engine and that ...6. **Inspect the Fuel Pump:** Check the fuel pump for proper operation. If the fuel pump is malfunctioning, it can deliver too much fuel to the carburetor. 7. **Verify the Fuel Tank Vent:** Ensure that the fuel tank vent is not clogged or obstructed. A blocked vent can create a vacuum in the fuel tank, leading to fuel delivery issues. 8.I have a 2010 90 HP EFI 4-stroke mercury. I bought the boat from my father in-law who said it did not have any issues. Obviously it does. So when i bought it there was an issue with fuel starvation due to the fuel pump cavity not being drained for winter storage last year. I replaced the internal float and no more starvation.The thermostat was frozen in the open state. Looked 90-100% open. After all the maintenance, engine will start and run fine at idle, sitting in driveway w/ water hose, runs perfect over 15 minutes. Took it out, ran fine first few minutes getting off trailer and near dock, 2000 RPM and below. Made 2 figure 8's at 2000 RPM, no problem.

Mercury Marine 90 hp (3 cyl.) fuel pump parts. Buy a genuine Mercury Quicksilver or aftermarket part. Go. important_devices: Order online, get free downloads* important_devices: Order online, get free downloads* Fast Trackable Insured Shipping. Menu ; Boat Engine Parts . All Engine Brands ... Parts for Mercury Marine 90 HP (3 …Problem #4: Loss of power. Loss of power is another common problem experienced by Mercury 40 hp 4-stroke engine owners. This problem can be caused by a number of factors, including a dirty fuel injector, a clogged fuel filter, or a faulty fuel pump. Solution. Clean the fuel injector or replace it if it is faulty. Replace the fuel filter if it ...When a computer "freezes," all activity ceases on the computer's monitor, and all currently running programs lock. It may seem like a particularly dire situation, especially if it ...I have a 2008 Mercury 4 Stroke (Serial # 0R241050) that is having some sort of High Pressure Fuel Pump power issue I think. Background: I got this pontoon/motor last year and it ran fine up until now. Since I've ran it I've only used 91 octane alcohol free fuel with Star Tron Marine Fuel Treatment. I replaced the old fuel hose from the portable ...This fuel pump fits all Mercury 4hp 4-stroke outboards. These fuel pumps are in stock and ship out the same business day if ordered before 3PM Eastern - after 3PM they will ship out next business day. Our flat rate shipping is USPS Priority which is 2-3 business days to most of the U.S. UPS Next Day and Second Day Air is available during checkout if you …I recently purchased a 2005 mercury 4 Stroke (carb). I have replaced the fuel line completely (from tank to motor) and added a water/fuel separator. Running it on the hose, it runs fine (idle & will take throttle). When i put it in the lake (water), it acts as if it’s starving for fuel. From 1000 rpm's to 2000 rpm's it bogs and acts as if it ...Water in Fuel. Four Beeps every 2 Minutes. Water in the water separating fuel filter reaches the full level. Water can be removed from the filter. Refer to Maintenance – Fuel System for filter removal. Cooling System Problem. Continuous. Engine Guardian System is activated. Power limit will vary with level of overheat.Nov 10, 2002. #4. Re: 2002 Merc 90hp 4 stroke. I have an '02 90 hp Merc 4-stroke with about 15 hrs. on it. No problems yet. Haven't noticed any " bog " when given full throttle. This engine is carbed. Mine is mounted on a pontoon. These engines have Yamy power heads and Merc lower units.Problem #4: Loss of power. Loss of power is another common problem experienced by Mercury 40 hp 4-stroke engine owners. This problem can be caused by a number of factors, including a dirty fuel injector, a clogged fuel filter, or a faulty fuel pump. Solution. Clean the fuel injector or replace it if it is faulty. Replace the fuel filter if it ...How to test, troubleshoot and rebuild an outboard motor fuel pump. This is how to rebuild the fuel pump on a Mercury 9.9 Hp 4 Stroke engine. See below for ...Re: Mercury 40 H.P. 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. idles good and is good at top end but cuts out in mid range. Changed spark plugs and has new gas going through it.This fuel pump fits the Mercury 40HP EFI 4-Stroke Outboards (All Years and Models). If your outboard is not EFI, please see this fuel pump for the carbureted models: Mercury 40HP Non-EFI 4-Stroke Fuel Pump We also sell the High Pressure Electric Fuel Pump for this outboard, you can find that here: Mercury 40HP EFI High Pressure Fuel Pump …

Common Problems with Mercury 40 HP 2-Stroke Outboard Engines 1. Fuel-related Issues. One of the most common problems with outboard engines, including the Mercury 40 HP 2-stroke, is fuel-related issues. These can manifest in various ways, such as poor performance, stalling, or a rough idle. Here are a few fuel-related problems and their solution:

Sierra 18-7808 Mercury Fuel Pump Kit Sierra replacement fuel pump kit for Mercury/Mariner engines. Sierra Marine parts are manufactured to meet or exceed OEM requirements. Fits: 75 hp (4 Cylinder) (Serial No. 6432901-C099999) 80 hp (Serial No... Add to CartMessages. 1. Jul 30, 2018. #10. Check the fuel pump. Pull the pump out of the engine, clamp off lines to the carbs and pump the inline bulb. If gas flow out around the end that goes into the engine, you need a new pump. My 50hp 4-stroke will dump 2 quarts of gas in the oil overnight if I leave the gas line hooked up.2010 mercury 4 stroke outboard low pressure fuel pump wont work unless I feed ground directly to it. ... I have a 2006 mercury 90hp 4 stroke which getting gas in the oil. checked fuel and it's ok . wondering if this problem is typical and what a possible cause. ... I am in the market for a 90 HP Mercury outboard motor. Which 2 stroke vs 4 ...Carburetor Repair Kit for Yamaha 2 Stroke 60HP 70HP Outboard Motor 6H3-W0093-02. $42.30. Trending at $45.00. Find many great new & used options and get the best deals for Mercury 90 HP 4 Stroke Dual Pump Fuel Supply Module Assembly PN 8M0057676 at the best online prices at eBay! Free shipping for many products!If you are consistently finding small pieces of yellowish plastic in your Mercury 115 HP 4-stroke outboard’s fuel filter, it’s essential to address the issue promptly to prevent further damage to your engine. Here are some steps to help diagnose and resolve the problem: 1.If you’re driving down the road and your engine sputters, your car temperature gauge rises, your car goes dead when you’re going up a hill or the car surges without pressing the ga...Marine Pump Replacement Parts; ... I have an opportunity to buy a 2007 Mercury 4 stroke 90 HP EFI. ... 1-mercury-2007-90hp-4-stroke-efi-fuel-problemThe HP LaserJet M1005 is a popular printer model known for its efficient performance and high-quality output. However, like any other electronic device, it can encounter download i...Fourstroke 90-115hp Command Thrust; Fourstroke 9.9-60hp Command Thrust; Pro XS® (115-300hp) Pro XS® 175-300hp; ... Fuel Basics; Preventing Corrosion; Battery Basics; Propeller Maintenance; Lubricants: ... Sign up for the Mercury Dockline Newsletter for news, promotions and more .The thermostat was frozen in the open state. Looked 90-100% open. After all the maintenance, engine will start and run fine at idle, sitting in driveway w/ water hose, runs perfect over 15 minutes. Took it out, ran fine first few minutes getting off trailer and near dock, 2000 RPM and below. Made 2 figure 8's at 2000 RPM, no problem.

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Available to Order: Usually ships within 10 days. #22. 10-885525 35. SCREW, (M6 x 35) Stainless Steel (1 required per assembly) 10-885525 35 - Screw - Priced Individually [ More info ] $4.50. Available to Order: Usually ships within 10 days. Revise Search: All Models > 60 HP EFI (4 Cylinder) (4-Stroke) > 1C050252 & Up (USA) > Fuel Pump.Messages. 1. Jul 30, 2018. #10. Check the fuel pump. Pull the pump out of the engine, clamp off lines to the carbs and pump the inline bulb. If gas flow out around the end that goes into the engine, you need a new pump. My 50hp 4-stroke will dump 2 quarts of gas in the oil overnight if I leave the gas line hooked up.SKÅNES FAGERHULT, Sweden, June 7, 2021 /PRNewswire/ -- Concentric AB receives a new development contract to supply electric coolant pumps for a fu... SKÅNES FAGERHULT, Sweden, June...Follow along as I figure out my fuel system issue on my Mercury outboard. | Fuel System RepairWebsite to find your parts - https://www.mercurymarine.com/en/u...Re: 2010 Mercury 90HP EFI 4 stroke - Bogs down after running short time Squeeze the fuel primer bulb when it bogs down. If it recovers, your fuel tank vent may not be working. On an engine that new one wouldn't expect any big problems that one usually has to address on older engines. Get back with your answer and we will go from there. …1. Do you hear the fuel pump? When you turn the key to start the engine, before you actually hear the engine you should hear the fuel pump spinning up. If you don’t, and …Messages. 1. Jul 30, 2018. #10. Check the fuel pump. Pull the pump out of the engine, clamp off lines to the carbs and pump the inline bulb. If gas flow out around the end that goes into the engine, you need a new pump. My 50hp 4-stroke will dump 2 quarts of gas in the oil overnight if I leave the gas line hooked up.99. 32K views 4 years ago. video showing service procedure for mercury 4 stroke outboard fuel supply module, consisting of high and low pressure fuel pumps, …Check the fuel line going the coupler at the front of the cowling. Have been seeing a lot of problems with the grey fuel line on these Mercs. The 4 strokes are also having a lot of problems with the float in the fuel supply module. Some it is necessary to replace the complete fuel module. ….

Parts for Mercury Marine Model 900, 90 HP Fuel Pump & Fuel Line Assembly. Revise Search: All Models > Model 900, 90 HP > 7111698 - 7123762 (Canada) > ... Messages. 3. May 25, 2015. #1. Ok little frustratedf. About a month ago i bought a 2012 Lund with a 2012 mercury 90 hp 4 stroke. Just turn key and go right. First 2 time out to the lake no issues started right up and no problems. I go on vacation pull the boat 1100 miles, get to the lake first day and it kinda started hard, had to crank it quit ...Table of Contents. 4 Common Issues with Mercury 60 Hp 4 Stroke. Problem 1: Fuel Issues. Problem 2: Carburetor Issues. Problem 3: Overheating Issue. Problem 4: Boat Becomes Slow But Consumes Excessive Fuel. Troubleshooting Mercury 60 Hp 4 Stroke Problems. Troubleshooting 1: Fuel Issues. Solution.Last week, we wrote about one way to get perspective on your problems by comparing them to, well, the size of entire planets and galaxies. Last week, we wrote about one way to get ...A diesel fuel lift pump is a lift pump that transfers fuel from the tank to the fuel injection system. Because in modern vehicles the tank is located below the engine, the fuel has...Change Engine Oil. If your new FourStroke has been broken correctly (according to Mercury recommendations) and operated for a few months under normal bass fishing conditions, the first maintenance usually occurs at the 100-hour mark. At that time, the engine oil and oil filter should be changed. Only use factory-recommended parts and …JLM MARINE 14360A78 Fuel Pump for Mercury Mariner 2 Stroke 30-300 HP Outboard Models 14360A73 ... This will fit all Mercury Mariner 90 Hp (3 CYL) Complete Fuel Pump Repair Kit WSM Sierra 18-7817 OEM# 89031A4. All kits include enough parts for one fuel pump, order one kit for ... There was a problem filtering reviews right now. …Aug 29, 2022 · Get a Mercury 40 HP 2 stroke fuel pump rebuild kit here: https://www.boats.net/product/mercury/857005A1?utm_source=youtube&utm_medium=video&utm_campaign=desc... This low lift pressure fuel pump assembly fits the Mercury 90HP EFI 4 Stroke. (Serial # 1B366823 to 2B094995) We stock all of our products and ship quickly (usually either the same day or next business day) from Massachusetts. Mercury 90 hp 4 stroke fuel pump problems, I recently purchased a 2005 mercury 4 Stroke (carb). I have replaced the fuel line completely (from tank to motor) and added a water/fuel separator. Running it on the hose, it runs fine (idle & will take throttle). When i put it in the lake (water), it acts as if it’s starving for fuel. From 1000 rpm's to 2000 rpm's it bogs and acts as if it ..., Feb 24, 2023. #1. I have a 24’ pontoon with a Mercury 90hp 4 stroke outboard. My engine info tag says that I have a 2007 90ELPT 4S. I’m working on it for a family member. My problem is that while in gear (F & R) @ idle, when I shift into Neutral, the engine stalls every time. It will immediately start with the ignition key while in Neutral., Engine Type: Mercury 90ELPT Inline 4 Four Stroke; Horsepower: 90hp; Cylinders: 4 cyl; Shaft Length: 20" Long; Steering: Remote Mechanical; Starting: Smart Start Electric; Weight: 360 lbs; Maximum Trim Range: 22° (-6° to 16°) Maximum Tilt Range: 70° (-6° to 64°) Alternator: 35 amp / 441 watt with Water-Cooled Voltage Regulator, Be the first to review this product. This low pressure fuel pump assembly fits the Mercury 90HP EFI 4-Stroke outboards (Serial #s 1B172291 through 1B366822). If you have a serial # higher than 1B366822, please see this fuel pump: Mercury 90 4-Stroke Low Pressure Fuel Pump (2006 and Newer) $139.99. Availability: In stock. SKU. FP126-211213-M90EFI., This low lift pressure fuel pump assembly fits the Mercury 90HP EFI 4 Stroke. (Serial # 1B366823 to 2B094995) $182.99. Availability: In stock. SKU. FP102180108-M90. Replacement Fuel Filters (This model uses 2 of them) None. 2 Fuel Filters + $34.99. , 1. Fuel injector circuit 2. The output signal from the ECU to the device is open circuit or has too much resistance. Faulty fuel injector. 300. 12. Throttle position sensor group. The device is disabled due to conditions present. Faulty throttle position sensor., Jun 13, 2019 · In a perfect world, we want to use 100 % fuel with no ethanol. Water will destroy any moving parts or motor especially on an outboard motor. In this video wi... , Feb 7, 2010 · Feb 8, 2010. #3. 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 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. , A diesel fuel lift pump is a lift pump that transfers fuel from the tank to the fuel injection system. Because in modern vehicles the tank is located below the engine, the fuel has..., 2012 Mercury 90 hp 4 stroke efi need help. Thread starter kfsrmn; Start date Jun 17, 2021; K. kfsrmn New member. Jun 17, 2021 ... Solved the fuel problem by replacing the fuel lines. The engine still shuts off for a second and comes back on like someone is turning the key off and back on quickly. ... 2013 mercury 90hp outboard EFI 4 stroke …, Available to Order: Usually ships within 10 days. #30. 32-828547T 1. CONDUIT, (.500 Inside Diameter x 3.00 Feet Bulk) (1 required per assembly) 32-828547T 1 - Conduit (.500 Inside Di [ More info ] $9.80. Available to Order: Usually ships within 10 days. Revise Search: All Models > 75 HP EFI (4-Stroke) > 1B172291 - 1B366822 (USA) > Fuel Pump., May 30, 2023 · Possible Cause: Incorrect fuel/oil mixture. Solution: Ensure that you’re mixing the proper ratio of gasoline and 2-stroke oil according to the manufacturer’s guidelines. Possible Cause: Damaged or leaking gaskets. Solution: Inspect the engine’s gaskets and seals for signs of damage or wear. Replace them as necessary. , I replaced a fuel pump and other stuff but it didn't fix my problem.However, at least I can share with you how to perform this easy task.(2001 60hp Mercury 4..., Turn off the main electrical cutoff switch. Remove the snaps on the outboard motor upper case and take off the cowl cover. Take the spark plug wire boot off the plug tip. Move this wire around from the opening by taping it to another part or wedging it between components. With your socket wrench, remove the plug., Find many great new & used options and get the best deals for Fm1t19568 Mercury 90 HP 4 Stroke Fuel Pump Assembly PN 804249T1 Fits 2000-2003 at the best online prices at eBay! Free shipping for many products!, Table of Contents. 4 Common Issues with Mercury 60 Hp 4 Stroke. Problem 1: Fuel Issues. Problem 2: Carburetor Issues. Problem 3: Overheating Issue. Problem 4: Boat Becomes Slow But Consumes Excessive Fuel. Troubleshooting Mercury 60 Hp 4 Stroke Problems. Troubleshooting 1: Fuel Issues. Solution., Available to Order: Usually ships within 10 days. #22. 12-40023 17. WASHER (4 required per assembly) 12-40023 17 - Washer - Priced Individually [ More info ] $1.60. Available to Order: Usually ships within 10 days. Revise Search: All Models > 90 HP EFI (4-Stroke) > 1B366823 & Up (USA) > Oil Pump., Apr 28, 2013. #1. 2001 Mercury Tracker Pro 115hp 2 stroke fuel problem. Engine has been sitting for about 6 months. New fuel filters and new gas. Fuel is coming from a 5 gallon container pressurized by the pumper bulb. If I use starting fluid it starts and continues to run good, both hi and low rpm. When I stop and try to start it just turns over., Table of Contents. 4 Common Issues with Mercury 60 Hp 4 Stroke. Problem 1: Fuel Issues. Problem 2: Carburetor Issues. Problem 3: Overheating Issue. Problem 4: Boat Becomes Slow But Consumes Excessive Fuel. Troubleshooting Mercury 60 Hp 4 Stroke Problems. Troubleshooting 1: Fuel Issues. Solution., Low pressure in the cylinders (use a compression test to find out) Holes and debris in and around the head gasket. 2. Bad Fuel Pump. One of the most common Yamaha 115 4-stroke problems is a bad fuel pump. There are plenty of signs that you can recognize when a fuel pump has gone bad for your Yamaha F115:, Feb 8, 2010. #3. 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 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., Are you tired of spending hours solving complex math problems manually? Look no further than the HP 50g Equation Library. The HP 50g is a graphing calculator renowned for its exten..., If you’re lucky, you won’t have to buy any replacement components, and the issue will be fixed at this stage. However, if you’re still stuck in the same problem, then there is a good chance that you’ll need to purchase a new fuel pump. These were a few common issues you can expect with a Mercury 4-stroke EFI outboard. If you take proper ..., Mercury 40HP Non-EFI 4-Stroke Fuel Pump. For 2001-2005 Models: If your serial # is 1B036614 or Higher - this is the correct fuel pump. If it is 1B036613 or lower (this includes all serial #s starting with a 0 or a 1A), please go to this fuel pump: Mercury 30-60HP EFI Fuel Pump (1B036613 and Lower) $359.99. Availability: In stock., Aug 18, 2011 · Re: 2010 Mercury 90HP EFI 4 stroke - Bogs down after running short time Squeeze the fuel primer bulb when it bogs down. If it recovers, your fuel tank vent may not be working. On an engine that new one wouldn't expect any big problems that one usually has to address on older engines. Get back with your answer and we will go from there. Mark , Hello my name is Jason I am from Searcy AR. I have a 2010 Harris Pontoon boat I purchased brand new with a Merc 115 Efi. Four stroke This boat is in excellent condition and never gave any problems until now . I am stumped and need help . I own a automotive shop and mechanicly encluned but not a marine tech for sure ., This high pressure fuel pump fits the Mercury 90HP 4-Stroke outboards (2006-2013 - Serial #s 1B366823 through 2B494018) In stock. SKU. FP101180108-Mercury-90. $194.00. Replacement Fuel Filters (This model uses 2 of them) None. 2 Fuel Filters + $34.99., This is an issue that can affect Mercury 90 HP 4 stroke engines if the fuel system is not properly maintained. 2. Fuel pump failure: The fuel pump is responsible for …, I show step by step process of changing oil in your motor, replacing the fuel filter, and changing the gear lube in the foot of the motor. I do all the servi..., Nov 3, 2016 · I used 3/8" fuel line, when I pump the bulb while it's running it improves, but stiil doesn't run perfectly. The rebuild kit for the fuel pump included a new diaphragm, new check valves and gaskets, and the rest of the pump looks OK, it does seem like a bad fuel pump, but I don't know what else could be bad in it, or how to diagnose that further. , The Kennedy Space Center has reinvented itself as a commercial spaceport, with NASA leasing out launch facilities to more than 90 private companies, including SpaceX, Blue Origin, ..., 2 Year Extended Warranty + $15.99. 1 Year Extended Warranty + $9.99. Add to Cart. Details. This fuel pump fits the Mercury 9.9HP 4-stroke outboard engine. Serial Numbers: Mercury Outboard Serial #s 0G760300 THRU 1B226999. Model Numbers: Mercury Outboard 1999 9.9HP 1F10213VD., Problem #6: Oil Leaks. If your Mercury 20 HP 4-stroke engine is leaking oil, it could be due to a number of factors. For instance, a damaged or worn out gasket could allow oil to leak out of the engine. In this case, you’ll need to replace the gasket to fix the issue. Another possible cause of oil leaks is a damaged or worn out seal.