4-2
ENGINE OVERSPEED
1. If the engine runs wide open (faster than normal),
shut the engine off immediately.
2. Check the condition of the external governor shaft,
linkage, governor spring, and speed control assembly
for breakage or binding. Correct or replace binding
or damaged parts.
3. Follow the governor static adjustment procedure and
reset the governor - see “Service” in this chapter.
4. Start the engine. Be ready to shut the engine off if
an overspeed condition still exists. If the problem
persists, attempt to hold the solid link between the
governor arm and the carburetor throttle plate in one
position. If this controls the condition, the engine will
require disassembly to inspect the governor gear
assembly for damage, binding, or wear. See Chapter
7 under “Disassembly Procedure”.
5. Remove the governor gear assembly. Repair or
replace as necessary.
ENGINE SURGING
1. Try to stabilize engine R.P.M. by holding the solid
link between the bell crank lever and the carburetor
throttle plate in a fixed position using a pliers or
fingers. (Illust. 4-4)
4-4
4-5
2. If the engine R.P.M. stabilizes, re-adjust the governor
setting. Check the governor shaft, linkage, bushing
clips and spring for binding, wear, or improper
hookup. Replace as necessary. If none of these
correct the problem it may be necessary to
disassemble the engine for internal governor repair.
3. If the engine R.P.M. does not stabilize, it may require
additional checks of the fuel system, see the fuel
system trouble shooting section.
GOVERNOR SERVICE
STATIC ADJUSTMENT - GOVERNOR
With the engine stopped, loosen the screw holding the
governor lever to the governor shaft. Push the governor
lever up to move the carburetor throttle plate(s) to the
wide-open throttle position. Rotate the governor rod
counterclockwise. Hold the lever and rod in this position
while tightening the screw. (Illust. 4-5)
ROTATE
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