2) AR21 (20 HP Honda)
ENGINE SPEED WAS ADJUSTED AT THE FACTORY TO 3,000 RPM +100/-0 WITH
NO LOAD. DO NOT EXCEED THIS SPEED. If speed adjustment is required adjust as follows:
1) Start engine and allow to warm up for 5 minutes.
2) Open throttle to full speed. Turn throttle lever to the full clockwise position.
3) Loosen hex jam nut on throttle lever limiting screw.
4) Turn throttle lever limiting screw clockwise to decrease maximum engine speed or
counterclockwise to increase maximum engine speed.
5) After adjusting to desired speed, tighten jam nut on throttle.
6) Turn throttle lever to the full counter-clockwise position (idle speed) and then to the
full clockwise position (full speed). Verify RPM and readjust if necessary.
7) Refer to Honda engine manual for additional information.
ADJUST MAXIMUM ENGINE SPEED TO 3000+100/-0
RPM UNDER NO LOAD. TURN C.W. TO INCREASE SPEED.
TURN C.C.W. TO DECREASE SPEED.
MAXIMUM ENGINE SPEED ADJUSTING SCREW
SPEED CONTROL
SECURE SCREW WITH
NUT 22 AS SHOWN.
3.5 - Setting Engine RPM, continued
SECTION 3
SERVICE
055838 Page 57
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