V 4.0
Engine for 20 in. 4-in-1 Self-Propelled Lawn Mower
8925521
Visit www.princessauto.com for more information
19
IMPORTANT! DO NOT pollute the environment by allowing uncontrolled
discharge of waste oil.
TROUBLESHOOTING
Visit a Princess Auto Ltd. location for a solution if the engine does not function
properly or parts are missing. If unable to do so, have a qualified technician
service the engine.
Problem(s)
Possible Cause(s)
Suggested Solution(s)
Engine will not
start.
1. Engine is cold.
2. Fuel valve in OFF
position.
3. Engine switch is in OFF
position
4. Engine oil is low.
5. Out of fuel.
6. Bad fuel, engine stored
without treating or
draining gasoline or
refueled with bad
gasoline
7. Spark plug is faulty or
improperly gapped.
8. Engine is flooded
9. Spark plug fouled/fails
to produce a spark.
10. Fuel filter restricted,
carburetor malfunction,
ignition malfunction,
valves stuck, etc.
1. Move choke to CLOSED position
until warm, then move to the
OPEN position.
2. Move to ON position
3. Move to ON position
4. Fill with the recommended oil to
the proper level.
5. Refuel
6. Drain fuel tank and carburetor.
Refuel with fresh gasoline.
7. Gap or replace spark plug
8. Move choke to OPEN/RUN
position and attempt to start the
engine.
9. Remove and clean spark plug.
Check electrode spacing and set
the gap to the correct dimension.
Replace spark plug if damaged.
Ensure the spark lead is installed
and wire is connected.
10. Replace or repair faulty
components as needed. Contact
Princess Auto Ltd or take engine
to an authorized service center if
necessary.
Engine will not
start, electric
start.
1. Power cord damaged
2. Battery dead.
3. Fuse or breaker tripped.
1. Repair or replace power cord.
2. Recharge or replace battery.
3. Replace fuse or reset breaker.