— US-16 —
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
performance. 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 Hedge trimmer is equipped with non-adjustable
fuel mixture carburetor. The engine idle speed is the
only adjustment for the operator.
The cutting blades may be moving during idle speed
adjustment. Wear the recommended personal
protective equipment and observe all safety
instructions. Keep hands and body away from the
blades.
When the throttle trigger is released, the engine should
return to an idle speed between 2700 - 3300 RPM, or
just below the clutch engagement speed. The blades
must not 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.
• Turn the idle speed screw in (clockwise) to
increase the engine idle speed.
• Turn the screw out (counter-clockwise) to
decrease the engine idle speed.
If idle speed adjustment is necessary, and after
adjustment the blade moving or the engine stalls,
stop using the Hedge Trimmer immediately!
Contact your local authorized MARUYAMA Dealer
for assistance and servicing.
Air Filter
Maintenance Interval
• The air filter should be cleaned
daily
, or more
often when working in extremely dusty
conditions.
• Replace after every 100 hours of operation.
Air Filter Cleaning
• 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, blades are
moving and other parts are moving.
WHAT CAN HAPPEN
• Contact with moving blades or other
moving parts could cause serious per-
sonal injury or death.
HOW TO AVOID THE HAZARD
• Keep hands, feet and clothing away from
blade moving and other moving parts.
• Keep all bystanders and pets away
from unit while making carburetor
adjustments.
WARNING
Air Filter Cover
Filter Screen
Foam Element
Idle Speed
Adjustment Screw
