Toro Lawn-boy - Engine Lacks Power; Engine Surges; Engine Backfires

TROUBLESHOOTING
6
TROUBLESHOOTING
Engine Will Not Start When “Cold”
Engine Will Start When “Cold”, But Not When “Hot”
Possible Causes Remedies
Fuel tank is empty Fill with clean, fresh, properly-mixed, unleaded fuel
Bad fuel Drain tank and float bowl. Fill the tank with clean, fresh,
unleaded, properly-mixed fuel.
Fuel filter plu
gg
ed Replace fuel tank
Air cleaner plu
gg
ed Wash and re-oil air cleaner element (DuraForce only)
Fouled spark plu
g
Remove and replace the spark plu
g
No spark at spark plu
g
See “En
g
ine Will Not Produce Spark” table
Insufficient momentum Check for loose blade, mower only
Incorrect i
g
nition timin
g
Check for sheared flywheel key
Low compression See “En
g
ine Has Low Compression” table
En
g
ine flooded with fuel See “En
g
ine Flooded With Fuel” table
Reed valves not closed Replace reed valves (DuraForce only)
Reed valves stuck closed Free up and run en
g
ine to clean (DuraForce only)
Primer or choke not operatin
g
Fix or replace
Possible Causes Remedies
En
g
ine is flooded See “En
g
ine Flooded With Fuel” table
Excessive alcohol in fuel Use no more than 10% ethanol blend. Avoid methanol
En
g
ine is overheated See “En
g
ine Overheats” table
Clo
gg
ed bowl vent Clean bowl vent
Fuel percolation (vapor lock) Use current season
g
as for fuel mixture