G
rass
T
rimmer
O
peraTOr
'
s
m
anual
17
spark
pluG
Level
2.
Tools Required:
Locking tool, wrench, feeler gauge, soft wire brush.
Parts Required:
REPOWER
TM
Tune-Up Kit
IMPORTANT
Use only NGK BPM-8Y spark plug (BPMR-8Y in Canada) other-
wise severe engine damage may occur.
1. Remove spark plug and check for fouling, worn and rounded cen-
ter 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 150-170 kgf • cm (130-150 in • lbf).
coolInG
system
Level
2.
Tools required:
T27 Torx L-Wrench, Cleaning Brush, 25 - 50 mm
(1 - 2 in.)
Parts Required:
None.
IMPORTANT
To maintain proper engine operating temperatures, cooling air
must pass freely through the cylinder fin area. This flow of air car
-
ries combustion heat away from the engine.
Overheating and engine seizure can occur when:
• Air intakes are blocked, preventing cooling air from reaching the
cylinder.
• Dust and grass build up on the outside of the cylinder. This build up
insulates the engine and prevents the heat from leaving.
Removal of cooling passage blockages or cleaning of cooling fins is
considered “Normal Maintenance.” Any failure attributed to lack of
maintenance is not warranted.
1. Remove spark plug lead.
2. Remove air cleaner cover (A).
3. Remove 2 engine cover screws and engine cover (B).
0.65 mm
(0.026 in.)
A
B
