On a 550 EXT... you can just drive it normally.
Eventually, the CDI box will fail, but instead of just nicely shutting
down the engine and leaving you to walk home... the box will add in about 10
degrees of timing every once in awhile.
If you happen to be "on the gas" at all when the box does it's trick...
things just sort of come unglued!
Then if you rebuild the motor and don't replace the CDI... it'll do it
> May I ask how do you blow up a snowmobile engine?
> > Need complete engine for 93 EXT 550 EFI. Blew it up bad, not worth
> > fixing..
> > Possible something else may fit???????????