B
FAULT TESTING
Read all of SAFETY and this section before attempting any procedure. Pay particular attention to Notices, Cautions, Warnings and Dangers.
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Repair and Service Manual
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ERRATIC, SURGING, OR SUDDEN
CHANGE IN GOVERNED SPEED
Damaged governor spring
Replace
Problem with adjustment of accelerator,
governor and linkage
Adjust
Bent governor arm
Repair or replace
Bent governor shaft
Replace
Governor failure within the rear axle
Repair
FUEL DISTRIBUTION
Clogged fuel vents
Clean vents with solvent
Faulty fuel pump
Clean vent screen.
Faulty accelerator adjustment/function
Correct per the service manual
Dirty or restricted air filter
Replace and clean air box
High pressure in the fuel system
Check fuel cap for venting. Make sure fuel
vent tubes are venting
MECHANICAL
Faulty Ignition system
Check ignition output per the service man-
ual.
Low or unbalanced compression
Perform compression or leak down test.
Refer to the service manual for the specifi-
cation.
Poor valve sealing
Verify by compression or leak down test
OPERATION AND APPLICATION
Engine not reaching full temperature
Increase run time intervals to build higher
cylinder temperature
Continuous use at 1/4 throttle or less at low
engine speed
Instruct operator
Wide open throttle cranking
Instruct operator per operator’s manual
Long and continuous down hill use
Down hill use without the accelerator par-
tially pressed will flood the cylinder with
fuel due to no ignition present
Poor fuel quality
Do not use old fuel. Add stabilizer for ex-
tended storage. Have fuel tested for con-
taminants.
Use of summer blend fuel in the winter
Correct with fresh fuel
Condition
Possible Cause
Correction
