Diagnose & Troubleshoot
Yard Machines Chipper Shredder

Engine runs erratic 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 or stale fuel
Clean fuel line; fill tank with clean, fresh gasoline.
Low engine RPM
Always run engine at full throttle.
Water or dirt in fuel system
Drain fuel tank. Refill with fresh fuel.
Dirty air cleaner
Clean or replace air filter.
Carburetor out of adjustment
See authorized service center.
Vent in gas cap plugged
Clear vent.