Cub - Running Rough Update

Hotflashjr

Well-known Member
Location
Western MA
Mixed up gas and ATF yesterday and ran two gallons through the Cub between idling ad various speeds and driving it around. The engine did seem to run a bit smoother and some power returned but I am still getting some popping through the air cleaner when I idle up, or down. I did get some white smoke coming out of the exhaust and black spots out the exhaust as well on the hood. I plan to put ATF in the spark plug holes next and try that and see where that gets me. Might be a stupid question, but after putting ATF in the spark plug holes is an oil change needed before running the engine?

Thanks.
 
No. Tranny fluid should burn off. That being said once you get your valve(s) freed up by these methods I would do an oil change before working it like normal.
JMO
 
ATF is a very high detergent type oil that cleans up rust and carbon and frees up parts. So unless your oil turns a red color your good to go. If it turns red like the ATF I would run it some then change the oil
 

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