hs.src = ('//s10.histats.com/js15_as.js'); This total loss of pressure keeps gas from getting to the engine, making it impossible to start. The Verado outboard is equipped with two fuel filters. 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. 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. 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. The outboard fuel pump has a sensitive diaphragm that receives a suction signal from a piston cylinder so the pump can deliver fuel. With an electric start, you will need a helper to crank the engine several times. Running down the battery can also negatively affect the power needed to start the engine. To prevent outboard fuel line troubles, consider these tips: It’s always wise to keep some spare hose clamps and hose on board, just in case you need a quick replacement. play video. 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! CDN$ 63.03 CDN$ 63 . Allowing the raw fuel to make its way out the exhaust and straight into the water. Since 1968, West Marine has grown to over 250 local stores, with knowledgeable Associates happy to assist. Additionally, check the sump pickup screen for clogs. The OPTIMAX is the most MIS-DIAGNOSED Outboard Engine. Basically, its tough to…, I noticed my 95 powerstroke had been acting kind of doggy lately. There can be many reasons why a 9.9 horsepower Mercury outboard will not activate; e.g. Look before you pump. Check out our YouTube channel for more step-by-step guides and practical tips. Problems with your Mercury or Mariner Outboard DFI OPTIMAX . Watch here to learn the maintenance schedule for each filter and maintenance tips. As to... Signs of a Bad Outboard Water Pump & Maintenance Tips. When the outboard fuel pump is bad, it operates similarly to when the boat runs out of fuel. and greeting from the fjords of Norway! 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. 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. Find Fuel Pump Diaphragm Kit - 857005A1 here. This high pressure fuel pump fits the Mercury 115HP 4-Stroke Motor. With this filter found within the vapor separator tank, all of the fuel is filtered before it gets to the fuel pump. 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! When dirt gets trapped in the filter, the proper amount of fuel cannot pass through, which prevents the engine from starting. To avoid headaches, it’s best to prevent a failure from occurring in the first place. The fuel pump is driven from the pulses of the crankcase or from a rod that is driven by the crankshaft. Is it wrong to run the engine at wide-open throttle? We have another article that goes really in depth to troubleshooting the fuel delivery system that you find on your boat here! Additionally, as part of your boat maintenance, you want to replace the fuel filter once a year. 4.6 out of 5. Crank the engine. (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 Thankfully, outboard fuel pumps don’t fail often. Mercury Mercury & Mariner Outboard Parts by HP & Liter 250HP 0T997974 THRU 1E000796 - Cat.# 90-892643005 FUEL PUMP An old or worn fuel pump may produce a noticeably loud whine or howl while running.