Quote:
Originally Posted by Ruth
OK look at the other side. If that gas were to evaporate, how is the going to help the engine on re-start?
I never mentioned rust, my concern was dry cylinders. And where is the gas going to evaporate to in a cylinder with the valves closed?
i think I will continue to let the carburetor run dry.
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I am not necessarily disputing or disagreeing with you on the 'restart' assistance.
I agree you never mentioned rust however I have looked at many cylinders doing inspections and they tend to rust, -even when the valve appear to be seated. This would tend to indicate there is a lack of oil there anyway. The skirts when cold have not expanded enough to create friction like they would when the engine is running. By the time an A engine has started, the rods have splashed enough oil where it is no longer an issue for the lower cylinder walls.
As far as where the evaporated fuel goes, my theory is it goes to the same place as where the compression goes when an engine is stopped. It slowly escapes past the ring gaps.