My Dad had (past tense) a generator with a 10 HP Tecumseh. It wouldn't start
one time, having not been run in a couple years since the last power cut. A
neighbor helpfully sprayed ether in the cylinder. The piston locked up, and
the machine threw a connecting rod. Not a good idea.
The other folks have had good suggestions -- drain all the gas out, and dry
it. Fresh gas. The other idea is to replace the gasket between the carb and
the side of the motor.
Christopher A. Young
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