Maintenance Instructions for Ford Engine (continued…)
Governor
Adjustment (Continued…)
•
Adjust the high speed stop screw on the governor to attain the desired maximum engine
speed - DO NOT exceed the recommended maximum RPM.
•
Tighten the Locknut.
The next adjustment is for spread . Proper governor operation requires a difference between
full load and no load governor speed. Too small an RPM spread between the 2 speeds will
cause governor hunting and surging. Too large a spread will cause low response. For this gov-
ernor, normal RPM spread is approx. 250 RPM within the full load speed range of 2000 - 2800
RPM.
To increase the RPM spread, adjust the screw to move the spring away from the lever hub.
To decrease the RPM spread, adjust the screw to move the spring closer to the lever hub.
The no-load surge adjustment is set at the factory and rarely requires adjustment. If necessary,
this adjustment can be used to prevent hunting and surging at no-load speeds only, provided the
RPM spread adjustment is set properly. Make the adjustment with the tachometer installed. In-
crease the engine speed with the hand throttle control to 75 RPM lower than the maximum no
load desired control RPM. Then loosen the no-load surge adjustment screw locknut and turn
the screw inward until the RPM increases to the desired control RPM. Reset high speed adjust-
ment screw and tighten locknuts.
CAUTION - Do not turn the screw in all the way. It will interfere with proper governor
operation and prevent the governor from returning the engine to idle speed.
Lubrication
At the specified intervals, apply an appropriate lubricant, such as Lubriplate (COAZ-19584-A)
at the pivot points on the throttle, governor, and throttle linkage.
Storage
One Month
While engine is running, treat upper cylinders by spraying engine fogging agent into the air in-
take for about two minutes. Fogging agent can be obtained from your local aftermarket sup-
plier. Open throttle for a short burst of speed, shut off ignition and allow engine to come to a
stop while continuing to spray fogging agent into air intake.
42
Содержание PRO 1900
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