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Muffler (Fig. 3-4)
Remove the muffler and clean out any excess
carbon from the exhaust port or muffler inlet every
100 hours of operation.
Cylinder (Engine cooling) (Fig. 3-4B)
The engine is air cooled, and air must circulate
freely around engine and over cooling fins on
cylinder head to prevent overheating.
Every 100 operating hours, or once a year
(more often if conditions require), clean fins and
external surfaces of engine of dust, dirt and oil
deposits which can contribute to improper cooling.
NOTE!
Do not operate engine with engine shroud or
muffler guard removed as this will cause
overheating and engine damage.
Maintenance schedule
Below you will find some general maintenance
instructions. For further information please
contact HITACHI dealer.
Daily maintenance
Clean the exterior of the unit.
Check that the harness is undamaged.
Check that nuts and screws are sufficiently
tightened.
Weekly maintenance
Check the starter, especially cord and return
spring.
Clean the exterior of the spark plug.
Remove it and check the electrode gap.
Adjust it to 0.6 mm, or change the spark plug.
Clean the cooling fins on the cylinder and
check that the air intake at the starter is not
clogged.
Clean the air filter.
Monthly maintenance
Rinse the fuel tank with gasoline.
Clean the exterior of the carburetor and the
space around it.
Clean the fan and the space around it.
Fig.3-4
G
B
Fig.3-4B
GB-9
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