Problems with your Mercury or Mariner Outboard DFI OPTIMAX . To avoid headaches, it’s best to prevent a failure from occurring in the first place. 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. To understand what you are looking at, you must first know the components of the outboard fuel system. You might notice engine stalling or sputtering. Often, other fuel system components are easier to troubleshoot and eliminate. We are Australian owned and operated and supply aftermarket outboard spare parts to the recreational and commercial boating industry. Is it wrong to run the engine at wide-open throttle? Running down the battery can also negatively affect the power needed to start the engine. 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. This pump has a sensitive diaphragm in charge or receiving the suction signal from the piston cylinder. Connect your fuel pressure gauge to the pulse hose. Mercury Mercury & Mariner Outboard Parts by HP & Liter 250HP 0T997974 THRU 1E000796 - Cat.# 90-892643005 FUEL PUMP However, you can’t judge simply based on this fact, as slow speeds will naturally improve fuel economy, but also cause the motor to run longer, putting more age on the engine. In modern fuel injected vehicles, the fuel pump sits right in the fuel tank and “pushes” the gasoline to the fuel rail (s). 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. Here are some of the most common reasons the outboard is struggling to start. If you are having trouble starting the engine, put fresh fuel in the tank and try again. and greeting from the fjords of Norway! 20. Next. If the compression seems okay, you can reinstall the spark plug and perform the same test on the other cylinders. One of the first symptoms of a problem with the fuel pump is a loud whining sound. 5 star 81% 4 star 7% 3 star 7% 2 star 0% (0%) 0% 1 star 5% How are ratings calculated? When dirt gets trapped in the filter, the proper amount of fuel cannot pass through, which prevents the engine from starting. (function() { Look before you pump. 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. Mercury Outboard Parts by Year (Mercury, Mariner, Mark, Force, Chrysler, Sears, SportJet) Force Outboard 1998 H075312UD - EL Fuel Pump Assembly Share this conversation. Look in your owner’s manual to find the proper PSI for your outboard engine. FREE Shipping by Amazon. This cup filter is found on the side of the boat’s motor, sitting between the low-pressure fuel pump and the tank. Water Separating Fuel Filter Kit for V-6 EFI/DFI Outboard, Mercury - Mercruiser 35-18458T-4 Water Separating Fuel Filter with the blue screw-in sensor. Make sure your ignition cutoff is activated and the plug wire is removed. Loosen the fuel filter hose clamps and pull off the filter. })(); 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. Brian Jones has spent most of his career as an ASE Certified Master Tech. Additionally, when fuel sits in the tank for too long, it loses octane and starts to separate or gum up the system. With your socket wrench, remove the plug. Before storing it for the winter, run the stabilizer through the tank for a few minutes. With your hand, twist the throttle position wide open. Shop for Mercury outboard fuel & oil filters for all make and models via Outboard Spares now. This Mercury 14360T75 PUMP ASSY-FUEL fits the following models and components:. 4.6 out of 5 stars. Water and trash can get into the fuel supply, causing a clog to occur. Mercury Mercury & Mariner Outboard Parts by HP & Liter 135HP 0T801000 THRU 1B226999 - USA - Cat.# 90-803502004 FUEL PUMP. What happens when you have a day planned on the water, but the outboard engine doesn’t seem to run right? Extended Warranty . Remove the snaps on the outboard motor upper case and take off the cowl cover. You got the boat packed with your gear and your best friends. _Hasync.push(['Histats.start', '1,4389492,4,0,0,0,00010000']); What is bad gas? 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. Running down the battery can also negatively affect the power starts cutting in and out keep hose! Maintenance Cost & How to save your engine ’ t fail often it for the Solution need... Rubber diaphragm pulls the gasoline from the pulses of the boat runs out of 5 stars … outboard... Up the system likely has a diaphragm included the Mercury 115HP 4-Stroke motor remove... 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