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B & S 13.5 HP engine. Won't start, good spark,backfiring on start

Seems to be getting gas. I replaced the top part of the engine (where the gear for the starter engages) because the original one was plastic and the newer one came from a 15 HP engine, it has a metal gear ring. As best I could, I lined the new one up on the center shaft, but I'm wondering, could it be out of time. Also, is there any way to check the timing.
Other than that, is there anything else I could check?
Thanks,
David

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Likely incorrect flywheel. As for timing, the key in the crankshaft is it. Check also air gap at coil.

Posted on May 18, 2009

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