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US-5
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PERATING INSTRUCTIONS
STARTING AND STOPPING
COLD STARTING PROCEDURE
The carburetor on this engine contain a choke system. To properly start a
“cold” engine, perform the following procedure.
1. Turn the choke lever to the Close position. Pomp the primer bulb at the
bottom of the carburetor until fuel can be seen flowing through the fuel
return line to the fuel tank. Flowing fuel should be almost clear, not
foamy or full of bubbles.
2. With the stop switch “ON” , and the throttle trigger positioned at FAST
-IDLE position, pull the starter cord. After the engine is started, turn the
choke lever to the Open position. Then squeeze and release the throttle
trigger to allow it to return to the idle position.
If the engine stops running before you turn the choke lever to the open
position : Go ahead and open the choke, pull the starter grip with the
throttle trigger positioned at FAST-IDLE position.
HOT RESTART
1. Turn the choke lever to the open position, and set the stop switch to the
“ON” position.
2. Leave the throttle trigger in the idle position and pull the starter grip.
3. If the engine fails to start after three to four pulls, follow the instructions
in the Cold Starting Procedure section above. If the engine fails to start
after you follow the above procedures, contact an authorized
MARUYAMA dealer.
ENGINE OPERATION
After starting, allow the engine to a few minutes to warm it up before using.
NOTE: DO NOT
have the engine under any load during this warm up
period. By squeezing the throttle trigger, increase the engine RPM to the
speed required for operation before placing the Brushcutter under load.
ALWAYS reduce the engine speed to idle when it is not under a load.
Do not operate the engine at high RPM’s with no load.
TO STOP THE ENGINE
1. Release the throttle trigger.
2. Slide the stop switch to the “STOP” position.
CARBURETOR ADJUSTMENT
This Brushcutter is equipped with non-adjustable fuel mixture carburetor.
The engine idle speed is the only adjustment for the operator.
When the throttle trigger is released, the engine should return to an idle
speed between 2700 and 3300 r/min, 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.
If idle speed adjustment is necessary, and after adjustment the Attached Tool rotates or the engine stalls,
stop using the Brushcutter immediately!
Contact your local authorized MARUYAMA dealer for assistance and servicing.
Primer Bulb
Fuel Return
Line
Starter grip
Choke lever
STOP(OFF)
Stop
switch
START(ON)
Fast-idle
start
position
Idle position
Fast-idle start
lock
