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P
OWER
B
LOWER
O
PERATOR
'
S
M
ANUAL
SPARK PLUG
Level 2.
Tools Required: 3/4" Spark Plug deep socket, Feeler gauge. Preferably
a wire gauge.
Parts Required: Spark Plug, NGK BPM-7Y, P/N 99944500071
1. Remove spark plug and check for fouling, worn and rounded
center electrode.
2. Clean the plug or replace with a new one. DO NOT sand blast
to clean. Remaining sand will damage engine.
3. Adjust spark plug gap by bending outer electrode.
4. Tighten spark plug to 145-155 kg/cm (125-135 in. lb.).
COOLING SYSTEM CLEANING
Level 3.
Tools required: 3/4" Spark Plug deep socket, Cross-Head Screwdriver,
Pointed Wood Stick, Cleaning Brush, 25mm - 50mm (1in.-2in).
Parts Required: None if you are careful.
IMPORTANT
To prevent overheating and engine seizure, cooling air comes
through the grille and is pushed by a cooling fan through the
cylinder fin area to an opening in the front of the engine cover,
taking away combustion heat. The grille and cylinder fins must be
kept clean of grass, dust and any debris. Engine failure due to lack
of this "Normal Maintenance" is not covered by warranty.
Cleaning Grill
Remove accumulated debris from crankcase intake grille above the fuel
tank.
Cleaning Cylinder Fins
1. Remove spark plug.
2. Remove engine cover (seven screws) and clean cylinder fins to
allow cooling air to pass freely.
0.65 mm
(0.026 in.)