I have a Tecumseh 4 stroke snowthrower for the past 4 years. I recently did an oil change and spark plug replacement on it, and now the engine will not run when the choke is released, even when properly warmed up. The only thing different about this motor is the spark plug. Is this the culprit, or is there something else I should check. The manual doesn't provide an answer, it just says to call a dealer.

Thanks.

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Jonathan

2011 Mazda2
2000 E320 4Matic Wagon
1994 C280 (retired)