Diagnose & Troubleshoot
Troy-Bilt Riding Mower

Engine runs erratically Possible Causes and Corrective Actions

Spark plug wire loose
Connect and tighten spark plug wire.
Unit running on CHOKE (if equipped)
Move choke lever to OFF position.
Blocked fuel line of stale fuel
Clean fuel line; fill tank with clean, fresh gasoline.
Water or dirt in fuel system
Drain fuel tank. Refill with fresh fuel.
Dirty air cleaner
Replace air cleaner paper element and/or clean foam pre-filter.
Carburetor out of adjustment
See authorized service center.
Vent in gas cap plugged
Clear vent.
Faulty spark plug
Clean, adjust gap, or replace.