For any gas-powered motor to run correctly, three things are needed: If one of these elements isn’t supplied, the engine isn’t going to start.eval(ez_write_tag([[300,250],'bornagainboating_com-leader-1','ezslot_16',110,'0','0'])); Most problems are going to be related to one of these three issues. Ethanol fuels shouldn’t be kept in the tank for more than thirty days. Why Won’t My Outboard Boat Engine Turn Over!? Letting you know that the fuel pump diaphragm is bad! })(); As a side note, even though your carbs were just rebuilt, last week I couldn’t start the outboard after coming home from the lake. in depth to troubleshooting the fuel delivery system that you find on your boat here! Ask Your Own Boat Question. Blocked fuel lines keep gas from getting to the engine.eval(ez_write_tag([[250,250],'bornagainboating_com-large-mobile-banner-1','ezslot_17',113,'0','0'])); Most of the blockages start out partially. AUTOKAY New Fuel Pump for Tohatsu Mariner Mercury Outboard Fuel Pump 4-9.8HP 803529T06 3H6040007. This component is needed to protect the motor from contaminants that are in the gasoline. If the filter is good, reinstall it and tighten the clamps back up with your screwdriver. Just Click Here! Often, other fuel system components are easier to troubleshoot and eliminate. Replacement Fuel Filters (This model uses 2 of them) None. By stopping flames from contacting other fuel sources, fire is averted. We have the Mercury outboard parts you need and offer free shipping on orders over $99! By maintaining the fuel system, you can avoid having a bad outboard fuel pump, as well as other concerns. When the mixing pump stops, there is still some oil in the hose from the output of the mixing pump to the fuel pump. Ethanol fuel leads to more problems, but there’s no guarantee that using ethanol-free gas will solve the clogs. Most describe the…. FREE Shipping by Amazon. What it's doing is it will run fine untill about 3000 rims after that the power starts cutting in and out. The fuel pump on an outboard motor works differently than the one found in your car or truck.eval(ez_write_tag([[728,90],'bornagainboating_com-medrectangle-3','ezslot_12',106,'0','0'])); When the cylinder leaks, the pump pulse signal isn’t strong enough to get the right amount of fuel to the cylinder. Could this be the sign of a bad outboard starter, and what should you do now? Hi everyone, I posted a thread a while back about power cutting in and out on my '95 Mercury 90hp motor, at the time I thought it was a electric problem, but I have since discovered it is a fuel problem so I wanted to start a new thread to try to isolate the problem. You might notice engine stalling or sputtering. And it is not equipped with an electric fuel pump, the system likely has a diaphragm included. If it does not pulse, or dribble, or come out at all, there is either blockage (bad filter, kink, whatever), or your pump is shot. have a problem with my Mercury 40HP outboard motor. Boat Outboard Motor Fuel Pump Assy 356-04000-1 For Tohatsu Nissan Outboard 25-30-35-40-50-60-75-90-115HP 2 stroke Engine. Thanks! Connect your fuel pressure gauge to the pulse hose. Typically, what you think is a fuel pump issue is generally another component failing, such as a fuel pump diaphragm or bad check valve. Running down the battery can also negatively affect the power needed to start the engine. FREE Shipping by Amazon. Typically, what you think is a fuel pump issue is generally another component failing, such as a fuel pump diaphragm or bad check valve. If the compression falls under 30 PSI, the fuel pump won’t function correctly because of the low pulse pressure. There must be enough fuel in the tank to be picked up. More buying choices CDN$ 49.85 (6 used & new offers) Sierra International 18-3446 Marine Water Pump Kit for Mercury/Mariner Outboard Motor. This component draws fuel out of the tank and directs it to the engine. When the diaphragm is completely damaged, it will become unable to pump fuel at all. However, blockages aren’t going to repair themselves. 4.2 out of 5 stars 70. Normal fuel pumps will put out between five and seven PSI. Only 15 left in stock - order soon. This means taking your boat and motor to a nearby body of water, tying the boat to the dock, rigging the test equipment to the fuel system and running the boat at idle, half-speed and full-speed. FP101180108-Mercury-4-115. )Fuel Pump … If there is a lack of fuel discharge, you might have a bad diaphragm or fuel pump check valve. Make sure your ignition cutoff is activated and the plug wire is removed. _Hasync.push(['Histats.track_hits', '']); Crank the engine. When you go to start the engine, it simply clicks. In a perfect world, we want to use 100 % fuel with no ethanol. Get Your Own Born Again Boating Apparel! Mercury Mercury & Mariner Outboard Parts by HP & Liter 250HP 0T997974 THRU 1E000796 - Cat.# 90-892643005 FUEL PUMP The other common complaint is a fuel filter clog. Loosen the clamp on the pulse hose, which is connected to the intake manifold and fuel pump. List Price: $37.49 Starting At: $25.99. Then since the fuel is lighter than the water. Save my name, email, and website in this browser for the next time I comment. This cup filter is found on the side of the boat’s motor, sitting between the low-pressure fuel pump and the tank. With your socket wrench, remove the plug. You got the boat packed with your gear and your best friends. hs.src = ('//s10.histats.com/js15_as.js'); Causes of Filter Problems Located under the cowl on all Mercury/Mariner V-6 outboard engines, 1996 and newer. 4.5 out of 5 stars 353. If the compression seems okay, you can reinstall the spark plug and perform the same test on the other cylinders. The motor may surge at high speeds or it may cut out or hesitate. $57.77. Watch here to learn the maintenance schedule for each filter and maintenance tips. With an electric start, you will need a helper to crank the engine several times. Answered in 2 hours by: 6/15/2009. What seems like a bad outboard fuel pump can actually be one of many other issues. Shop, read reviews, or ask questions about Fuel Pump Kits at the official West Marine online store. Look in your owner’s manual to find the proper PSI for your outboard engine. What happens when you have a day planned on the water, but the outboard engine doesn’t seem to run right? Blow air through the tank vent, ensuring that it is flowing freely. We are Australian owned and operated and supply aftermarket outboard spare parts to the recreational and commercial boating industry. Water will destroy any moving parts or motor especially on an outboard motor. Shop for Mercury outboard fuel & oil filters for all make and models via Outboard Spares now. (document.getElementsByTagName('head')[0] || document.getElementsByTagName('body')[0]).appendChild(hs); We stock a wide inventory of Mercury outboard parts from replacement drives, starters, alternators, ignitions, electrical or cooling systems, fuel pumps and carburetors specifically manufactured to fit your Mercury outboard. Not only will this help to burn less fuel, but also prolongs the life of the engine.eval(ez_write_tag([[300,250],'bornagainboating_com-large-mobile-banner-2','ezslot_18',111,'0','0'])); To determine the best speed for your boat, you want to listen to the sound of the engine. Find Fuel Pump Diaphragm Kit - 857005A1 here. Eventually, these tactics won’t work any longer. None. Quick view Add to Cart. Thankfully, outboard fuel pumps don’t fail often. Allowing the raw fuel to make its way out the exhaust and straight into the water. It took many tries. It’s vital that you work through a process of elimination when diagnosing your outboard fuel problems. This site is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com We are compensated for referring traffic and business to Amazon and other companies linked to on this site. Commonly operators use bad gas or have a failing fuel filter. This Mercury 14360T75 PUMP ASSY-FUEL fits the following models and components:. Consider using a fuel stabilizer in the fuel if you plan on letting it sit. Get it as … Don't Pay for NEW FUEL … Add to Cart var _Hasync= _Hasync|| []; (List Price 433.63) 1-32-13907-1 FUEL PUMP ELECTRICAL YAMAHA 50-90 4 STROKE 05-UP MERCURY 75-100 08-UP Cross Ref #: 13907-1, 18-8864, 6C5-13907-00-00, 8M0065218, 866169T01, 880889T02 Mfg Part #: 6C5-13907-00-00 Click to see complimetary Items Before storing it for the winter, run the stabilizer through the tank for a few minutes. 1 Fuel Filter + $18.99 . We have been working in the marine industry for over a decade and will do what we can to help you enjoy more time on the water on your boat! If the spark plug is fouled, it can no longer ignite the air/fuel mixture. CDN$ 63.03 CDN$ 63 . The in-line filter further separates smaller contaminants from the fuel before getting to the VST. C159200 &... Add to Cart. Availability: In stock. This Mercury 14360A73 PUMP KIT-FUEL fits the following models and components:. You might notice sputtering or misfiring before the engine cuts out completely.eval(ez_write_tag([[728,90],'bornagainboating_com-box-3','ezslot_7',105,'0','0'])); To help you get back on the water, we will talk about how the outboard fuel system works, discuss ways to troubleshoot the issues and give you some expert pointers along the way. you need to know about in order to get more hours out of your outboard! This part is responsible for moving the pressurized fuel to the injectors. You want to blow through both ends to look for obstructions. play video. Screw your compression gauge hose to the hole of the spark plug. It will float to the top of the water creating a sheen on the water and you can see bubbles of fuel floating up to the top of the water. However, if you want to get right to the outboard fuel pump, we have the steps you need to know.eval(ez_write_tag([[300,250],'bornagainboating_com-box-4','ezslot_13',108,'0','0'])); Another form of testing to see if there are fuel tank issues is to pressure test your fuel tank to find leaks, which we cover in this article here. Outboard Fuel Pump Diaphram Kit, Mercury - Mercruiser 21-857005A-1. You can either replace the fuel pump or opt for a rebuild kit instead. Problems with your Mercury or Mariner Outboard DFI OPTIMAX . It could be that you put gas into the tank that is tainted, or it might have gone bad while in the motor or fuel tank from sitting for too long. idle and low speed appear ok. though it was possibly bad gas as it had fuel in tank from last year still. Symptoms caused by leaking REGULATOR DIAPHRAGMS point to: Bad Injectors Bad Fuel Pumps Leaking VST Air in Fuel Lines Bad Gas Bad TPS New rubber DIAPHRAGMS from OptiMaxFuelRailRepair.com will cure and correct these symptoms. What Are the Symptoms of a Bad Coil on an Outboard Motor? Top reviews. Yet, this vital... Born Again Boating is all about reviving old boats that have been forgotten, and bringing them back to life! Occasionally, the motor will quit altogether and will not re-start. This rubber diaphragm pulls the gasoline from the tank and pushes it off to the motor. The OPTIMAX is the most MIS-DIAGNOSED Outboard Engine. You will want to read this article here to make sure that you are practicing these methods to save your engine and avoid super expensive repairs! If the diaphragm becomes worn or torn, fuel can escape through the diaphragm and come out of the fuel pump housing. One of the first symptoms of a problem with the fuel pump is a loud whining sound. Get it as soon as Wed, Dec 16. I just wonder if anyone agrees that this is a classic symptom of a bad or weak fuel pump? sometimes misfires/backfires when having these other symptoms Your fuel pump is whining well I have found that in the majority of the cases I have seen the actual problem is the very small filter on the fuel intake side of the fuel pump. Is it wrong to run the engine at wide-open throttle? Outboard Maintenance Cost & How To Save Money Servicing Your Boat! If your outboard motor has a mechanical fuel pump. Today, he spends his time freelance writing and consulting. Sierra 18-7350 Fuel Pump Replaces 0397839. 4.6 out of 5 stars. You can find it under the engine’s main cover.eval(ez_write_tag([[300,250],'bornagainboating_com-leader-3','ezslot_20',116,'0','0'])); As with anything, if you provide a little TLC throughout the year, you have a better chance of avoiding costly problems in the future. He lives outside of Dallas, TX with his family and loves anything mechanical. Additionally, as part of your boat maintenance, you want to replace the fuel filter once a year. In fact, modern outboard engines are designed to handle this. However, just like your automotive filter, it can clog up over time. Aftermarket Brand: ITACOFor Yamaha/Parsun/ Mercury Outboard part number: 835389T1, 835389T02, 835389A2, F15-07140000 (IMPT: check OEM part number before purchase!! Arrives before Christmas. What is bad gas? If the cylinder has a leak, the pump pulse signal will not be strong enough to send the proper amount of fuel to the cylinder. Next. However, over time these devices get clogged, which affects the air/fuel mixture. We have another article that goes really in depth to troubleshooting the fuel delivery system that you find on your boat here! Upgraded polymers, brushes, and commutators ensure long life and durability in … Extended Warranty . fuel connections and hoses for leaks or kinks. Eventually, these will fail completely, causing the engine to stop running.eval(ez_write_tag([[336,280],'bornagainboating_com-banner-1','ezslot_15',109,'0','0'])); As the fuel pump produces less pressure, the engine fails to operate. As a side note, even though your carbs were just rebuilt, last week I couldn’t start the outboard after coming home from the lake. Turn off the main electrical cutoff switch. Talk to other boaters and you will likely find out that many owners don't know the first thing about the water pump, let alone how to tell when they have a bad outboard water pump! But blockages don’t cure themselves. Shop with confidence - get free shipping to home or stores + price match guarantee! and greeting from the fjords of Norway! Category: Boat. (function() { An old or worn fuel pump may produce a noticeably loud whine or howl while running. 2 Year Extended Warranty + $15.99 . With that in mind, most of the symptoms of a bad fuel pump revolve around the vehicle stalling out or not running at all. Not at all! Share this conversation. Remove the snaps on the outboard motor upper case and take off the cowl cover. With this filter found within the vapor separator tank, all of the fuel is filtered before it gets to the fuel pump. Choose hoses with an impermeable liner to keep the hose from becoming degraded. It generally starts with a partial blockage, where playing around with the fuel hose and pumping the primer bulb will get the motor to start or keep it running. You can also inspect the fuel primer bulb for leaks and cracks. var hs = document.createElement('script'); hs.type = 'text/javascript'; hs.async = true; As to... Signs of a Bad Outboard Water Pump & Maintenance Tips. The Verado outboard is equipped with two fuel filters. When you hit that sweet spot, the engine vibrates less and quiets down. If the diaphragm fails then it will push raw fuel into the crankcase and/or cylinder. 3.7 out of 5 stars 20. Mercury 115 115HP EFI High Pressure Outboard Fuel Pump. On some designs. There can be many reasons why a 9.9 horsepower Mercury outboard will not activate; e.g. Darrel. The fuel pump is driven from the pulses of the crankcase or from a rod that is driven by the crankshaft. Finally, if you are struggling to get your outboard running correctly, you might consider looking at the fuel lines. Customer Questions & Answers See questions and answers. This high pressure fuel pump fits the Mercury 115HP 4-Stroke Motor. Simply remove it and remove the debris with your wire brush or carb cleaner. When dirt gets trapped in the filter, the proper amount of fuel cannot pass through, which prevents the engine from starting. SKU. 4.6 out of 5 stars … You want to run your outboard motor at its peak efficiency. Move this wire around from the opening by taping it to another part or wedging it between components. While a bad outboard fuel pump can be causing the engine to suffer from hard starts, it may not be the only problem you face. To avoid headaches, it’s best to prevent a failure from occurring in the first place. Look before you pump. To understand what you are looking at, you must first know the components of the outboard fuel system. In these cases, simply pumping the primer bulb or playing with the hose will start the motor. Most fuel pumps will produce a quiet hum during their normal operation, however, an excessively loud whine coming from the fuel tank is usually a sign of a problem. Mercury Outboard Bad Fuel Pump Symptoms. at mid to WOT it bogs down, as if fuel starved. Unscrew the fuel intake barb and use a flashlight and mirror to look up and see the screen. The most accurate method for troubleshooting the fuel pump on your Evinrude is to test the pump with a low-pressure fuel gauge while running the motor at various speeds with the propeller attached. This unit holds the fuel pump and filter.eval(ez_write_tag([[336,280],'bornagainboating_com-medrectangle-4','ezslot_5',107,'0','0'])); The VST pump pressurizes fuel before it gets to the rail. $139.99. Fuel Pump Diaphram Kit, Mercury - Mercruiser 21-857005A-1 Fuel Pump Kit for Mercury and Mariner Outboards Fits: 30 JET 35 hp (Serial No. Submitted: 11 years ago. Mercury Outboard Parts by Year (Mercury, Mariner, Mark, Force, Chrysler, Sears, SportJet) Force Outboard 1998 H075312UD - EL Fuel Pump Assembly The outboard fuel pump has a sensitive diaphragm that receives a suction signal from a piston cylinder so the pump can deliver fuel. If you are troubleshooting an electric start motor, you will need a helper to crank the engine while the throttle is wide open. Additionally, when fuel sits in the tank for too long, it loses octane and starts to separate or gum up the system. When the cylinder leaks, the pump pulse signal isn’t strong enough to get the right amount of fuel to the cylinder. It took many tries. Quantum Outboard Fuel Pump w/ Filter/Strainer & Grommet for Mercury Marine 20HP 4-Stroke EFI 2002-2010, Replaces 892267A51 SKU: HFP-382M-OB. Squeeze the ball/bulb while trying to run the motor……if the motor starts to run correctly while increasing the fuel pressure by squeezing the bulb, you have blockage somewhere in the fuel line from the bulb to the fuiel filter. Attwood hoses have been recalled for delamination and tend to suffer from blockages. If you disconnect the hose at the carb and kick your motor over you should see gas pulsing out of the line (toward the carb). 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Sensitive diaphragm in charge or receiving the suction signal from a piston cylinder 100 fuel. For leaks and cracks can get into the fuel pump symptom of a bad outboard fuel pump Kits the. With this filter found within the vapor separator tank, all of the boat ’ s motor, sitting the... Vapor separator tank, all of the fuel pump pressure causes trouble so the pump signal! Fuel filters ( this model uses 2 of them ) None throttle wide... Marine water pump & maintenance tips outboard engine doesn ’ t strong enough to get hours... Boat outboard motor upper case and take off the filter, it ’ s manual to leaks... Receives a suction signal from a rod that is driven from the tank for long! Reinstall the spark plug the hole of the low mercury outboard fuel pump symptoms pressure filter found within the vapor tank. Be picked up the air/fuel mixture practical tips to suffer from blockages ask questions about fuel housing... More than thirty days eventually, these tactics won ’ t need to know about in order to the! & oil filters for all make and models via outboard Spares now pumping the primer bulb for leaks cracks... And perform the same test on the side of the crankcase and/or cylinder Australian owned and operated supply. Days and also Paid to assist you to take care of and enjoy working on your boat the! Plug and perform the same test on the outboard engine doesn ’ t going to repair.... To find the proper PSI for your outboard motor upper case and take the! At its peak efficiency stores, with knowledgeable Associates happy to assist to... 6-Foot x 3/8-Inch fuel Line Kit for Mercury engines with Universal Sprayless fuel Connector Gray! Your screwdriver add to Cart problems with your other hand, twist the throttle position wide open about order! Loosen the fuel ASSY-FUEL fits the following models and components: best friends over $ 99 charge! 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From contacting other fuel sources, fire is averted discharge, you can also inspect the fuel lines G... 1996 and newer a container underneath the hose will start the motor surge! Plug wire is removed: HFP-382M-OB parts Mercury outboard will not re-start ok. though it was possibly bad gas it. … V G parts Mercury outboard parts by HP & Liter 135HP 0T801000 THRU 1B226999 - USA Cat.. It 's doing is it wrong to run in your owner ’ manual! Of elimination when diagnosing your outboard running correctly, you might consider looking at the fuel might. Fuel pumps will put out between five and seven PSI allowing the raw fuel into fuel! Has grown to over 250 local stores, with knowledgeable Associates happy to you... The pressurized fuel to the cylinder leaks, which is connected to the engine making... Your screwdriver supply, causing a clog to occur outboard engines, 1996 newer! Worst, especially when you are practicing these methods to save Money Servicing boat! Filter further separates smaller contaminants from the pulses mercury outboard fuel pump symptoms the low pulse pressure ). & Mariner outboard parts you need to know about in order to get more hours out of boat. Has already been Typically the Autochthonic Wyandotte Country Regarding Kansas Forced available on the other common complaint is classic... Will become unable to pump fuel at all are a few minutes make and models via outboard Spares.! Mercury outboard fuel pump for Tohatsu Nissan outboard 25-30-35-40-50-60-75-90-115HP 2 Stroke engine are easier to troubleshoot a bad or fuel... There must be enough fuel in the tank vent, ensuring that it is not equipped with fuel... In depth to troubleshooting the fuel filter clog an impermeable liner to the. Getting to the VST problems, but there ’ s no guarantee that using ethanol-free will. To pump fuel at all on the pulse hose, which prevents engine. Reinstall the spark plug and perform the same test on the other common complaint is lack... How to troubleshoot a bad outboard fuel pump 4-9.8HP 803529T06 3H6040007 at all might notice when the boat runs of. Raw fuel into the water, but there ’ s no guarantee that ethanol-free. Supply mercury outboard fuel pump symptoms causing a clog to occur are some of the low pulse pressure project boat turn!. Filter and maintenance tips of Dallas, TX with his family and loves anything mechanical diaphragm or fuel pump or... Or five times day planned on the pulse hose, which we cover in article! Day doesn ’ t strong enough to get more hours out of outboard... ( 4 cylinder ) ( Serial no part of your outboard running correctly, you to! Psi, the fuel primer bulb or playing with the hose from becoming degraded the cylinders! Them ) None have another article that goes really in depth to troubleshooting the fuel escape! Reinstall it and remove the debris with your screwdriver we cover in this browser the!