Uuuh, I used pure gasoline

[t_andersen]

Guys,

By an awful mistake I brought the wrong gasoline tank today when I went out on the lake in my boat with a 4 HP Evinrude outboard. It did not hold a gasoline/oil mix but pure gasoline. Before starting, the tank on the outboard motor was about half-full of gasoline/oil mix, but then I topped it up with pure gasoline. Therefore, for the first about 30 minutes of ride, I was in effect running on gasoline with a 1:100 or 1:150 mix. Then I refueled again, and ran for 35 minutes non-stop at full throttle and almost pure gasoline. The motor seem to work well, no noises, no smoke, no problem.

My questions are:

1) Considering that I didn't hear noises or see smoke or anything, can I assume that I didn't damage the motor?

2) Should I take any special action before restarting the motor? I could take out the spark plugs and pour a little oil into the cylinders and pull the cord a couple of times slowly. Or maybe some other action?

Thanks for any advice-

Tom

 

[ezeke]

Re: Uuuh, I used pure gasoline

You have probably burned off all protective oil on your engine and need to get it covered as soon as possible. I would run a heavy mixture through the engine, like 24:1.

You can oil the pistons from the spark plug holes but you can't reach any of the bearings that way. See if you can find some aerosol fogging oil and blow it straight in through the carburetor while running slowly. Back off as the engine starts to die and then repeat.

 

[iwombat]

Re: Uuuh, I used pure gasoline

Ugh. Just for that very reason I never mix until it goes into the running tank. That way there's no confusion, and all my gas tanks are usable in whatever needs fuel.

You probably shortened the life by quite a bit, but if you give it a good dose of oil now it shouldn't be a total disaster.

 

[kenmyfam]

Re: Uuuh, I used pure gasoline

Give it a nice rich mix and see how it runs. Did you do a compression check ???

 

[CharlieB]

Re: Uuuh, I used pure gasoline

Remove the carb, turn it upside down and most all the fuel will leak out,

Mix a tank of fuel CORRECTLY and pump the primer until the new oiled fuel starts coming out of the carb fuel line, reinstall the carb and fuel line and start it up.

Run it a while then check compression.

No noise, you got REAL lucky this time. Don't count on ever getting so lucky again.