20
CHECKING THE SPARK PLUG
Only use the supplied universal wrench to remove or to install the spark plug.
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The gap between the two electrodes of the spark plug should be 0.7 - 0.8 mm
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(0.028” - 0.032”). If the gap is too wide or too narrow, adjust it. If the spark plug is
clogged or contaminated, clean it thoroughly or replace it.
CAUTION: Never touch the spark plug connector while the engine is running
(danger of high voltage electric shock).
Cleaning the fuel filter (suction head in the fuel tank)
WARNING: INFLAMMABLES STRICTLY PROHIBITED
Check and clean the fuel filter monthly or every 50 operating hours.
The fuel filter (1) of the suction head is used to filter the fuel required by the
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carburetor.
Visually check the fuel filter regularly. To check the felt filter, open the tank cap,
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use a wire hook and pull out the suction head through the tank opening. Replace
the felt filter if it has hardened, been contaminated or be clogged.
Replace the felt filter at least quarterlyto ensure an enough fuel supply to the
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carburetor. Otherwise an insufficient fuel supply will cause the engine start failure
and limited maximum speed.
0.7 mm - 0.8 mm
(0.028” - 0.032”)
Fuel pipe
Hose clamp
Fuel filter (1)
Replacing the fuel pipe
CAUTION: Inflammables strictly prohibited
Check and clean the fuel pipe daily or every 10 operating hours.
Replace the fuel pipe every 200 operating hours or every year regardless of
operating frequency. Otherwise fuel leakage may lead to fire.
If you find any leakage during inspection, replace the oil pipe immediately.
INSPECTION OF BOLTS, NUTS AND SCREWS
Retighten loose bolts, nuts, etc.
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Check for fuel and oil leakage.
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Replace damaged parts with new ones for safety operation.
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CLEANING OF PARTS
Keep engine clean by wiping down with a cloth rag.
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Keep the cylinder fins free of dust or dirt. Dust or dirt adhering to the fins will
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cause piston seizure.
REPLACEMENT OF GASKETS AND PACKINGS
Replace gaskets and packings if the engine is disassembled.
For any maintenance or adjustment not described in this manual, ask your local
MAKITA authorized service center.
Fuel pipe
