8
AIR FILTER SERVICE
A dirty air filter will restrict air flow to the carburetor, reducing engine performance. If you operate the engine in very
dust areas, clean the air filter more often than specified in the MAINTENANCE SCHEDULE.
WARNING!
Never use gasoline or low flammable point solvents for cleaning the air cleaner element. A fire or explo-
sion could result.
NOTICE!
Operating the engine without an air filter element, or with a damaged air filter element, will allow dirt to
enter the engine, causing rapid engine wear.
1. Remove the wing nut from the air cleaner cover, and remove the cover.
2. Remove the wing nut from the air filter, and remove the filter.
3. Remove the foam air filter element from the paper filter.
4. Inspect both air filter elements, and replace them if they are damage.
5. Paper air filter element: Tap the filter element lightly several times on a hard surface to remove excess dirt, or blow
compressed air through the filter element from the inside out. Never try to brush the dirt off; brushing will force dirt
into the fibers.
6. Foam air filter element: Clean in warm soapy water, rinse, and allow to drying thoroughly. Or clean in nonflammable
solvent and allow to drying. Dip the filter element in clean engine oil, and then squeeze out all excess oil. The engine
will smoke when started if too much oil is left in the foam.
STORAGE
The following steps should be taken to prepare your Walk-behind Power Trowel for extended storage.
1. Close fuel shut off valve.
2. Siphon excess gasoline from tank.
3. Start engine until it stops from lack of fuel. This will use up all the fuel in the carburetor and prevent formation of
deposits due to evaporation of fuel.
4. Remove spark plug and pour 2 oz. of SAE-30 or SAE-40 motor oil into the cylinder. Slowly crank the engine 2 or 3
times to distribute the oil throughout the cylinder. This will help prevent rust during storage. Replace spark plug.
5. Store the unit in an upright position in a cool, dry, well ventilated area.
TROUBLESHOOTING
1. WON'T START
• Throttle fully open
• Hand lever wire broken
• No gas
• Dirty gas
• No oil
• Gas filter plugged
• Gas line plugged
• Hole in gas line
• Gas supply valve turned off
• Dead-man safety switch is off
• Safety switch wire or connectors
not making good contact
• Other engine problems (Refer to
engine manual)
2. STARTS BUT NO HIGH SPEED
• Engine problems
• Throttle lever and connectors loose or out of adjustment
• Throttle cable broken or seized
• Clutch shoes worn
3. STARTS AT HIGH SPEED, WON'T SLOW DOWN
• Same as above
4. ENGINE WON'T STOP
• Safety switch, wire or connectors not making good contact •Micro-switch burnt out
5. ENGINE STARTS BUT WON'T TURN TROWELS AT ANY SPEED
• Clutch seized
• No weights in clutch
• Wrong belt
• Gearbox seized
• Broken or missing key
— Clutch seized
— Pulley
— Worm gear (countershaft)
— Main gear
— Spider plate
