[AT] Cub--shouldn't have broken my resolution....

[John Kennedy]

Take the spark plug out on one of the dead cylinders turn engine over until 
intake valve is open and exhaust valve is closed. Hold throttle wide open 
then put a large volume of air into the spark plug hole. If you get a large 
volume of air out of Carburator then its clear. Try both bad cylinders. If 
its got a mouse nest in it you will know right away.
Although I'm more inclined to to think that you have a major intake air 
leak.  Does your intake mainfold feed both of the dead cylinders with the 
same tube.

John K.

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