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DISASSEMBLY, REASSEMBLY, INSPECTION, AND MAINTENANCE 3-5
Carburetor
Minimum No-Load Speed Adjustment
•
After completing the pilot screw adjustment, the minimum no-load
adjustment must be adjusted.
•
Keep the throttle lever on the carburetor pushed gently to the fully
closed position, and turn the idle adjustment screw so that the engine
runs at 100 rpm lower than the set idle speed. (This is called the
"carburetor’s idle speed setting".)
•
Release the throttle lever of the carburetor to free the speed
adjustment lever. Turn the low-speed set screw on the control panel
to set the engine speed to the minimum no-load speed.
Minimum No-Load Speed (idling) Setting (crankshaft speed)
FE120, 170: 1600 rpm
FE250, 290, 350, 400: 1300 rpm
NOTE
If the minimum no-load speed is specified for a particular piece of
equipment, follow that specification.
Maximum No-Load Speed Adjustment
•
After completing the minimum no-load speed, it is necessary to adjust
the maximum no-load speed.
•
Keep the speed adjustment lever to the high-speed side, and turn the
high-speed set screw on the control panel to set the engine speed
to the specified maximum no-load speed. (If the maximum no-load
speed is specified for a particular piece of equipment, follow that
specification.)
Maximum No-Load Speed Setting
4000 rpm (crankshaft)
NOTE
All adjustments described in steps "1." through "3." must be
performed on a warm engine and do not change their adjustment
sequence.
A: Pilot Screw
B: Throttle Lever
C: Idle Adjustment Screw
D: High-Speed Set Screw
E: Low-Speed Set Screw
F: Governor Arm
G: Pivot Arm