condensation at startup.

I don't know whether I just wasn't paying attention in school that day or if my poor old memory is failing me; probably a little bit of both.

But, I do recall the fact that basically, a gasoline engine is really little more than a steam engine without the boiler and without the firebox and that those powerful "expanding gases" that are a result of the combustion are, in a large part, nothing more than the steam which is created during that same process of combustion.

As I remember, it is still the newly created and rapidly expanding ‘steam’ that actually provides the power and that the other chemical elements of the exhaust gases are merely residual leftovers of the explosion.

Maybe someone better educated than I can explain the process in better detail.

Allan

All gasoline engines create steam during the combustion process. You can hold your hand over any gasoline engine exhaust while it is running and you can feel that moisture.

Steam condenses into water as it cools in the exhaust. Betcha your tractor is plumb normal.

Allan

Bob