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post #19 of Old 07-02-2013
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Re: Fuel in oil - where to start?

Originally Posted by Skagit View Post
Wish I could say the same...

It's officially gross fuel recoil from the smell of fuel on the dip stick gross fuel contamination. Compression check came in good...95/105 (factory new is 107).

Another thought I had...I haven't busted out my level, but it appears to me that the carb is lower than the bottom of the fuel tank. I wonder if fuel is slowly flowing through the carb and pooling...gravity wins every time, right? The spark plug threads were wet with fuel when I did the compression test and the engine hadn't run in two weeks.
That may be a possibility. Some electric pumps will allow fuel to flow through them when they are not operating. If the manifold is lower than the float bowl
fuel may be seeping past the float valve even when the engine is not running.

If it is running OK the "seepage" may not be enough to notice, but may be enough to accumulate in the pan. You might try installing a fuel shut off valve right at the tank.

Paul T
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