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Ski Doo 503 snowmobile engine for ultralight help

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Lifted1

Well-Known Member
Joined
Aug 13, 2014
Messages
96
Location
turlock, CA USA
Hello,

the engine used in the snowmobile appears to be the same as the aircraft. I can purchase the snowmobile engine with good compressions for $500 and used aircraft one is 1500+.


Is there any difference? any reason i would not want to do this?

I have no prior 2 stroke experience.



Is there a yamaha 4 stroke snowmobile engine that is of the 503 2 stoke equivalent?
 
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