Triumphrat

Lurch

Just rebuilt some Daytona 1200 carbs complete with seals, gaskets and jet kit.

I believe the carbs were leaking through the float assy's as the o-rings were completely shot. The result of this is a crankcase full of gas. Anybody else encounter this and what did you do to overcome it.

We're gonna drain it and let it air out.

I verified the carbs do not leak now so my repair work fixed that.

Don't know if the gas went down the cylinders when the rings were cold, or if it went down the crank breather tube that runs to the airbox.

Any input will be appreciated.

Darrell

Hinckley

I have had the same thing happen to me before on a GPZ. I actually had two problems, the carbs needed cleaned and rebuilt and the fuel petcock also needed rebuilt. So, the fuel would flow through the petcock and past the float assy into the cylinders and past the rings.

In my case, cleaning the carbs helped but it would have cured the situation had I repaired the petcock also.

A fresh oil & filter change and a ride long enough to get the engine up to temp will take care of any fuel left in the crank case.

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UFOB #56

The Mighty Buffalo

Lurch

Thanks for the info. The petcock keeps gas from flowing when there is o vacuum, but it leaks from the stem and handle part. Will definiteley rebuild that also.

Thanks

SWare

With a standard oil change there is still a lot of old oil left in the engine. I would change it again in a few hundred miles.

stan

Lurch

Thanks, my plan is to drain and air out for a few days, fill with normal oil, run it a little while, then drain and put the good stuff in it.

More to come

dolson

Gas in the crankcase will evaporate and some left over shouldn't do any harm.
Many recip airplanes operating in cold climates have what is known as "oil delute" It's a switch that will pump gas into the crankcase thinning the oil making the engine easier to start. Once started and the engine warms up and the gas evaporates.

Don

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