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V 4.0
Engine for 20 in. 4-in-1 Self-Propelled Lawn Mower
8925521
Visit www.princessauto.com for more information
15
ADJUSTING THE ENGINE IDLE SETTING
NOTICE! The engine speed is set by the factory. Increasing the speed too
much can damage the engine. Too low a speed will reduce the engine’s
efficiency. Have a qualified technician adjust the engine speed if
necessary.
The engine does not have a variable speed option. The engine’s idling speed is
adjustable by turning the governor arm screw to lower or increase the engine
output (RPMs).
1. Remove the shroud and locate the governor arm screw.
2. Start the engine and wait for it to idle.
3. Tighten the screw to increase the engine speed. Loosen to reduce speed.
4. Shut the engine off and allow to cool
5. Reattach the shroud.
CLEANING
WARNING! Only clean engine parts with a nonflammable solvent, unless
instructed otherwise. Keep all ignition sources away from fuel-related
parts. Fumes are flammable and may cause a burn injury or explosion if
ignited.
NOTICE! Do not clean the engine’s exterior with a garden hose or pressure
washer. Water can enter the engine through the air filter or muffler opening
and damage the cylinder.
1. Allow engine to cool for at least half an hour before cleaning.
2. Clean all exterior surfaces.
3. Touch up any damaged paint.
4. Coat other areas that may rust with a light film of oil.
STORAGE
DANGER! Fuel is very flammable. Use extreme care when handling or storing
fuel. An ignition source contacting the fumes or fuel can result in a fire or
explosion and cause fatal or serious injuries to you or a bystander.