Toro Lawn-boy - Engine Stalls; Spark Plug Fouled

11
TROUBLESHOOTING
Engine Stalls
Spark Plug Fouled
Possible Causes Remedies
En
g
ine out of fuel Refill with fresh fuel of the correct mixture
En
g
ine overloaded Unload en
g
ine and restart
Fuel filter plu
gg
ed Clean fuel filter/tank
Spark plu
g
fouled See “Spark Plu
g
Fouled” table
Fuel cap vent plu
gg
ed Replace fuel cap
I
g
nition inadvertently
g
rounded Inspect and repair to remove unwanted
g
round
Carburetor vent plu
gg
ed Clear vent of obstruction
En
g
ine overheated Clear debris from fins or cause of overheatin
g
Improper lubrication Tear down and inspect for dama
g
e
Possible Causes Remedies
Incorrect spark plu
g
Use correct spark plu
g
Carburetor runnin
g
too rich Clean/rebuild carburetor
Clo
gg
ed air cleaner element Clean and re-oil element or replace, mower only
Overuse of “choke” position Move control off “choke” position and check throttle
cable adjustment
Weak i
g
nition system Replace CD i
g
nition pack
Worn rin
g
s and/or cylinder Rebuild en
g
ine or short block
Use of poor fuel Drain fuel tank and replace with fresh, unleaded re
g
ular
fuel havin
g
the correct oil mixture
Fuel/oil mixture too rich Drain fuel tank and fill with fuel of correct mixture
Wron
g
Oil Use Toro 2-cycle oil, Lawn-Boy DuraForce oil, or
NMMA TCW3 approved oil