Service Manual

2-4 PERIODIC MAINTENANCE
Periodic Maintenance Procedures
Fuel System
Low Idle Speed Adjustment
•
Disconnect all possilble external loads from the engine.
•
Start the engine and warm it up thoroughly.
Always keep your hands clear of the moving parts.
•
Move the throttle lever on dash to the idle position, and hold the
throttle lever on the carburetor in closed position (turn the governor
arm clockwise all the way) and adjust the low idle speed screw [A]
until the engine idles at specified speed.
Idle Speed (Carburetor idle rpm)
1450 rpm
•
Release the throttle lever and adjust the low idle speed set screw [B]
on the control plate to obtain the specified governed low idle speed.
Low Idle Speed (Governed idle rpm)
1550 rpm
High Idle Speed Adjustment
NOTE
High idle speed adjustment should be made after the idle speed
adjustment is performed.
CAUTION
Do not adjust high idle speed with the air cleaner removed.
•
Start and warm up the engine throughly.
Always keep your hands clear of the moving parts.
•
Move the throttle lever at a dash to the high idle position and match
the lever hole position with the panel hole by inserting 6 mm dia., pin
or bolt [A].
•
Loosen two M6 control panel mounting bolts [B] enough to move the
control panel assembly.
•
Carefully move the control panel assembly right side [C] up or down
to obtain the specified high idle speed.
High Idle Speed
3600 rpm
•
Tighten the M6 Mounting bolts.
Torque - Control Panel Mounting Bolts: 5.9 N m (0.60 kgf m, 52 in lb)
•
Remove the 6 mm dia., pin or bolt.
•
Check the idle speed, and readjust the idle speed if necessary.
CAUTION
Be sure to make the idle and high idle speeds respectively
correspond to those of the equipment.