5.7
Section 5
Fuel System and Governor
5
Figure 5-7. Governor Springs Installed.
Figure 5-8. Checking Spring Looseness.
3. Hold the governor lever away from the
carburetor so the thro le lever is against the idle
speed (RPM) adjustment screw of the carburetor.
Start the engine and allow to warm up, then
adjust the screw to set approximately 1200 RPM.
Check using a tachometer. Turn the adjustment
screw (inner) clockwise (in) to increase or
counterclockwise (out) to decrease speed.
4. Release the governor lever and check that the
thro le lever is in the idle (centered) position.
See Figure 5-9. Turn the governed idle (outer)
adjustment screw to obtain the equipment
manufacturer’s recommended idle speed
(1500-1800 RPM). The governed idle speed
(RPM) is typically 300 RPM (approximate) higher
than the low idle speed. See Figure 5-10.
Figure 5-9. Throttle Lever in Idle Position.
Figure 5-10. Setting Governed Idle Speed RPM
(Air Cleaner Removed For Clarity).
5. Move the thro le lever to the wide-open/full
thro le position and hold in this position. Check
the RPM using a tachometer. Turn the high speed
screw to obtain the intended high speed no-load
RPM. The governed idle speed must be set
before making this adjustment. See Figure 5-11.
Governed Idle
Spring
Governor
Spring
Hold/Pull Governor
Lever Back
Governor Spring Must
Be Loose In Slot
Governed Idle Speed
Adjustment Screw
High Speed(RPM)
Adjustment Screw
High Speed
Adjustment
Screw
Full Throttle
Position
Figure 5-11. Setting High Speed RPM (Air Cleaner
Removed for Clarity).
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