Maintenance; Idle Speed Adjustment - Maruyama QC-PS Manuel Du Propriétaire

Saw chain tension adjustments
WARNING
• When using the pruner be sure to turn
the engine off before making any
inspections or any adjustments.
• Do not make any adjustments when the
guide bar or saw chain is still hot
immediately after using the pruner.
Wait until it has cooled before making
any adjustments.
1. Turn the nut on the chain cover once to loosen it.
2. Lift up the leading edge of the guide bar and turn
the regulating screw to tighten the saw chain.
Turning the screw clockwise tightens the saw
chain, whereas turning it counterclockwise looses
the saw chain.
3. Securely tighten the nut on the chain cover.
4. Verify that the saw chain on the central section of
the guide bar can be lifted with fingers 3 to 4 mm
off the guide bar.

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 autho-
rized by MARUYAMA Manufacturing Company, Inc.
The use of parts that are not equivalent in performance
and durability to authorized parts may impair the effec-
tiveness 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 Multi-Cutter is equipped with non-adjustable fuel
mixture carburetor. The engine idle speed is the only
adjustment for the operator.
WARNING
• Idle speed adjustment should be
checked each time the unit is operated.
POTENTIAL HAZARD
• Engine must be running to make car-
buretor adjustments.
• When engine is running, attached tool
and other parts is rotating / moving
and other parts are moving.
WHAT CAN HAPPEN
• Contact with rotating / moving tool or
other moving parts could cause seri-
ous personal injury or death.
HOW TO AVOID THE HAZARD
• Keep hands, feet and clothing away from
attached tool and other moving parts.
• Keep all bystanders and pets away from unit
while making carburetor adjustments.
The Attached Tool may be rotating/ moving during idle
speed adjustment. Wear the recommended personal pro-
tective equipment and observe all safety instructions.
Keep hands and body away from the Attached Tool.
When the throttle trigger is released, the engine should return
to an idle speed. The correct speed for models M27QC,
M30QC are 2700 - 3300 RPM, and for M42BK-QC is 2400 -
2800 RPM, or just below the clutch engagement speed. The
Attached Tool must not rotate/move 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.
● T urn the idle speed screw in (clockwise) to increase
the engine idle speed.
● T urn the screw out (counterclockwise) to decrease
the engine idle speed.
If idle speed adjustment is necessary, and after adjust-
ment the Attached Tool rotates/moves or the engine
stalls, stop using the Multi-Cutter immediately!
Contact your local authorized MARUYAMA Dealer for
assistance and servicing.
— US-13 —
WARNING
Idle Speed Adjustment Screw