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After squeezing the primer bulb you may hear the sound of fuel filling the water separator canister. Change the fuel filter.
Blocked fuel lines keep gas from getting to the engine.
Mercury outboard fuel line problems. A blocked outboard fuel line prevents fuel from getting to the motor. 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. Outboard Motor Does Not Start.
Empty gas tank or dirty low-quality fuelClosed gas tank air ventClogged fuel filter or fuel line leakageDamaged batteryFaulty kill switch. Engine May Stalls Loss Power or Make Excessive Vibration. Damaged loose or fouled propellerDamaged or broken shear pinWorn-out or damaged spark plugs.
Outboard Fuel Line Problems. Finally if you are struggling to get your outboard running correctly you might consider looking at the fuel lines. Blocked fuel lines keep gas from getting to the engine.
Most of the blockages start out partially. In these cases simply pumping the primer bulb or playing with the hose will start the motor. I have a 4hp Mercury 4 stroke outboard.
I have gone through a few connectors that connect the fuel line to the motor. The prongbarbpinthingy on the motor seems to damage the o-ring. It leaks when primingsqueezing bulb.
Then is difficult to start. Must reprime and start frequently. Fuel Line Problems Squeeze bulbs have a check valve at both ends that allows fuel to only flow in one direction–from the tank to the engine.
When the outboard is running normally the engines fuel pumps create a slight vacuum in the fuel hose. Mercury 100hp outboard Not rated yetIt is a 1988 Searay Seville 165 feet with a 100hp mercury outboard in Searay colors. There is a loose ground wire in back near the fuel tank and.
1982 mercury 35 hp Not rated yetPrimer bulb never gets hard wont stay. 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. 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. Launch and run the rpms up and down under load. Ethanol destroying the inner lining of fuel line if not a brand specific issue.
Mercury is not the only brand who suffers from the devestating effects of ethanol. Just this year alone we have replaced fuel lines and cleaned fuel systems on Mercury Suzuki Yamaha Tohatsu JohnsonEvinrude Honda and even some sterndrives. OUTBOARD FUEL SYSTEMS DIAGNOSIS.
Got winter fuel in the tank come summer this will sometimes cause problems because winter fuel blends are. Large outboards are a minimum of 3 psi 20 kPa fuel pressure and a maximum of 4 inches of mercury in HG 100 mm. With regular maintenance the proper kit for your Yamaha or Mercury model and the right set of tools most outboard issues are fully preventable.
Still there are a few specific ways to keep your outboard motors fuel system in top shape. Another option for supporting the longevity of your motor is fuel stabilizers. It happens on all 4 different tote tanks so thought it must be a perished fuel line so replaced the whole thing including bulb but its still doing it.
Did you figure out the cause of your issues Boyo. I was going to replace the fittings to totes and outboard next but Im guessing it is a fuel pump issue now. Mines a 95 90hp mariner.
We have a 2006 Mercury EFI 4-stroke. We are not getting fuel from the tank to the outboard. 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.
Is there a pump for drawing from the. OMC IO or Inboard Fuel. The problem with the fuel line can be identified once you have realized that there is no fuel left after idling the engine for 5 minutes or more.
After squeezing the primer bulb you may hear the sound of fuel filling the water separator canister. Mercury FourStroke outboards 60hp and below are equipped with a primer bulb a rubber spheroid the approximate size and shape of a chicken egg located in the fuel line between the fuel tank and the engine. First connect the fuel line to the engine if not already attached then pump squeeze the bulb repeatedly until its firm.
Mercury 40HP 4-Stroke Outboard Fuel System Rebuild. Older outboards are notorious for encountering problems with their fuel systems such as contaminants in the fuel or problems with water mixing with ethanol. If playback doesnt begin shortly try restarting your device.
In this case the 90-HP FOURSTROKE with all the carburetor fouling problems is the older model. Once Mercury changed to electronic fuel injection for these engines the problems went away. When Mercury changed to its own engine there were other problems with the fuel system and the engine but these are not the topic of this discussion.
Your outboard motor is the heart of your marine vessel and if it is having trouble with the fuel supply it can put a damper on your day on the lake river or ocean. Two of the most common problems when it comes to fuel supply in your outboard motor are bad fuel. ConnectorFuel - Engine End.
Due to manufacturer policy OEM Mercury products can. Fuel system problems The most likely problems to beset older two-stroke outboard engines are with the fuel system. Modern fuels have a shelf life of only a few months especially when mixed with two-stroke oil with the fuel leaving a black varnish or gum on the inside of the carburetor when it.