Fouled spark plugs from flooding. The best spark in the world doesn't help if all the voltage leaks away down the porcelain insulator instead of jumping the gap. I solved a similar problem last week by having another bolter remove his plugs and heat them with a Propane torch.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!