Craftsman LT1000 won't start/backfires
Accidently got off tractor and seat switch killed engine which backfired. Now won't start and backfires while trying to start. Good spark with new plug. Fuel supply OK. Fuel solenoid works OK. Kill system seams OK. Filter clean. This is a B&S 18HP OHV Intek engine with valve lifters and springs, etc. Any clues from anyone with similar experience? Could the backfire have caused valve problems/broken springs/other. Don't want to dig in if there is a simple solution.