Fuel Starvation

I have a 1995 Evinrude E50DTLEOS. This 8s the VRO2 oil injection motor.
The engine is mounted on a pontoon boat. The fuel system is 6 gallon pressurized (non-vented) outboard tank with hose and primer. This is the 4th season since I've owned this. The 1st year I had trouble keeping the engine running and it emitted a lot of blue smoke. I discovered the fuel inlet fitting part where the hose attaches to the engine had pushed into the fitting so it wasn't entering into the hose fitting far enough. I repaired that and all ran fine for 2 seasons.

Now the first 2 times I took it out this year engine started fine and seemed to run OK for about 20 minutes or so then it abruptly lost power and died. It stated OK and ran just a few minutes and quit again. It did this repeatedly until I got back to the dock.

Yesterday the engine started great and ran on idle for just a few minutes and quit. It started right up and died again. After repeating this a bunch of tines I changed the fuel filter an tried another, new, hose and primer and another fuel tank. After all that the symptoms remained.

I then took it out. It ran rough but kept going for 30 minutes or more. After docking it it seems better. I am wondering if having it run out of fuel so many times when the inlet fitting was bad may have harmed the fuel pump.

Also the primer bulb never dies get hard like other outboards I've owned.

Re: Fuel Starvation

The fuel tank has a vent on the top of the fill cap that needs to be open in order to allow air into the tank to replace the volume of fuel used by the engine.

Make sure this is open.

If you do not have a fuel water separator installed you should get one. A bulkhead mounted filter that is the size of a car oil filter.

Re: Fuel Starvation

The tanks I have do not have vented caps like any other outboard tanks I've dealt with. These tanks build pressure when they are hotter. There is a releif check valve inlet as part of the float gauge fuel fitting at the top of the tank.

Re: Fuel Starvation

Sounds like a plastic tempo fill and vent combination.

Check your fuel primer bulb assembly and see if the engine mounted filter assembly is free of obstructions and debris.

The fuel system is pretty straight forward and the problem can be found by tracing the path the fuel takes from tank to combustion.

Hope this helps.