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Maintenance
Maintenance, replacement or repair of emission
control devices and systems may be performed by
any repair establishment or individual; however,
warranty repairs must be performed by a dealer or
service center authorized by MARUYAMA
Manufacturing Company, Inc. The use of parts that
are not equivalent in performance and durability to
authorized parts may impair the effectiveness of the
emission control system and may have a bearing on
the outcome of a warranty claim.
Maintenance on today's low-emission engines is
even more critical for longest life and best perfor-
mance. particularly critical are air and fuel filters,
spark plug heat range, cooling air intake area and
proper gaps of coil and plug.
Idle Speed Adjustment
This
is equipped with non-adjustable fuel
ture carburetor. The engine idle speed is the
adjustment for the operator.
WARNING
• Idle speed adjustment should be
checked each time the unit is operated.
WARNING
POTENTIAL HAZARD
• Engine must be running to make carbu-
retor adjustments.
• When engine is running, saw chain is
moving and other parts are moving.
WHAT CAN HAPPEN
• Contact with moving saw chain or other
moving parts could cause serious per-
sonal injur y or death.
HOW TO AVOID THE HAZARD
• Keep hands, feet and clothing away from
saw chain and other moving parts.
• Keep all bystanders and pets away from
unit while making carburetor adjust-
ments.
The cutting head may be rotating during idle speed
adjustment. Wear the recommended personal protec-
tive equipment and observe all safety instructions.
Keep hands and body away from the cutting head.
When the throttle trigger is released, the engine should
return to an idle speed between 2700 and 3300 RPM,
or just below the clutch engagement speed. The cutting
head must not rotate and the engine should not stall
(stop running) at engine idle speed.
To adjust the engine idle speed, rotate the idle speed
adjustment screw on the carburetor.
• Turn the idle speed screw in (clockwise) to
increase the engine idle speed.
• Turn the screw out (counterclockwise) to decrease
the engine idle speed.
If idle speed adjustment is necessary, and after
adjustment the cutting head rotates or the engine
stalls, stop using the Pruner immediately!
Contact your local authorized MARUYAMA Dealer
for assistance and servicing.
Air Filter
Maintenance Interval
• The air filter should be cleaned daily, or more
of ten when work i ng i n ext remely dust y
conditions.
• Replace after every 100 hours of operation.
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Idle Speed
Adjustment Screw
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