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POTENTIAL HAZARD
When wire is on spark plug, someone could
accidentally start the engine.
WHAT CAN HAPPEN
Accidental starting of engine could
seriously injure you or other bystanders.
HOW TO AVOID THE HAZARD
Pull wire off spark plug before you do any
maintenance. Also push wire aside so it
does not accidentally contact spark plug.
Before each use, inspect the backpack blower for
proper assembly and fitness of all components. Check
all fasteners for correct tightness. Always inspect for
fuel leaks.
Do not attempt to start or operate a
backpack blower that has a fuel leak. A
fuel leak is a potential fire hazard that
could cause a fire and personal injury.
Servicing Air Filter
Inspect the air filter each time the backpack blower is
used, or more often in extreme conditions.
1.
To inspect, remove the air filter cover. Then
remove the element from the case (Fig. 13).
2.
Clean the felt air filter and the cover with
compressed air (Fig. 14).
3.
Wash the sponge air filter with a suitable
cleaning solvent. Dry the sponge filter
completely after washing.
Replacing Spark Plug
Remove plug after every 50 operating hours and
check its condition. Replace spark plug every
100 operating hours or every season. Use a Champion
RCJ7Y spark plug or equivalent.
1.
Stop engine and wait for all moving parts to
stop. Pull wire off spark plug.
2.
Clean around spark plug and remove plug from
cylinder head.
IMPORTANT: Replace a cracked, fouled, or
dirty spark plug. Do not sand blast, scrape, or
clean electrodes because engine damage could
result from grit entering cylinder.
3.
Set air gap at 0.024 – 0.028" (Fig. 15). Install
correctly gapped spark plug and gasket seal.
Tighten plug firmly to 10–12 ft–lb.
Servicing Fuel Filter
Clean and inspect the fuel filter for damage after
every 20 hours of use. The fuel filter is attached to the
fuel pick-up tube inside the fuel tank (Fig. 16).
Loosen the clamp and remove the filter (Fig. 17).
1.
To clean the fuel filter, remove it from the fuel
tube and wash it with fuel mixture.
2.
Inspect and clean the fuel tank before
re-installing the fuel filter. Always replace a
defective fuel filter.
Cleaning the Cooling Fins
Air must pass freely through the cylinder cooling fins
to prevent poor engine performance and shortened
engine life. Regularly check and clean all debris from
the cooling fins by removing the engine cover
(Fig. 18).
6
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