Section 1 Safety and General Information
Checking spark
1) Remove spark plug
2) Put the spark plug on the spark cap
3) Connect (－) electrode of the spark plug（thread）to grounding, pull starter to check if there is spark
at the electrode joint.
WARNING
d. Overheating
e. Engine performance poor
Don’t grab spark terminal by wet hand
when testing.
If touching the high voltage line by wet
hand, pulling starter can produce high
voltage electric, being danger.
Sprinkled fuel can cause fire around the
spark plug. First, clean the fuel, then
check. When checking, keep far away from
the spark plug hole.
Engine starts, but stops
immediately
Carburetor fuel level too high
Carburetor bolt adjusting wrong
Carburetor insulator damaged
Engine speed does not increase
Throttle closed
Clogged muffler
Improper valve timing
Water in the carburetor
Overheating
Poor valve seat contact
Engine speed does not decrease
Governor out of adjustment
Throttle out of seat
Speed does not stabilize.
Governor out of adjustment
Clogged carburetor idle speed nozzle
Carburetor tightening screw out of adjustment
Bad oil in the carburetor
Carburetor insulator damaged
Unhooked governor spring
Cylinder pad or head cover sealing
pad trouble
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