TROUBLESHOOTING ENGINE PRIMARY SYSTEMS
I
.A
WARNING I Many troubleshooting procedures
present
hazards which can
result
in
severe
personal
injury
or
death.
Only
qualified
service
personnel
with
knowledge
of
fuel, electricity,
and
machinery
hazards
should
perform
service procedures. Review
safety
precautions
on
inside
cover
page.
Trouble
Possible Cause
1.
Restricted airflow due to:
Engine
Overheats
a.
debris blocking air inlet
or
outlet
Black
Exhaust
Smoke
White or
Blue
Exhaust
Smoke
b.
improper installation
2. Dirt or oil covering engine
cooling fins.
3.
Lean fuel mixture due to:
a.
incorrectly adjusted fuel
mixture screws.1
b.
incorrect float level.
1.
2
c.
dirt in carburetor.
d. vacuum leak.
1.
Rich fuel mixture
due.
to:
a.
incorrect float level
b.
faulty carburetor float.1 · 2
1. Lean fuel mixture due to:
a.
incorrect float level. 1 • 2
b.
incorrectly adjusted fuel
mixture screws.1
c.
dirt
in
carburetor
d. vacuum leak
2. Contaminated fuel.2
3.
Excessive engine wear
1 - Prior to Spec F only
2 - Gasoline models only
6-3
Corrective Action
1.
a.
Clear away debris. Do not use genset
compartment for storage.
b.
See the Installation Manual.
2. Clean away all dirt and oil from engine
cooling fins.
3.
a.
Adjust carburetor main and idle
adjustment screws. 1
3.
b.
Adjust carburetor float level.
1
c.
Disassemble carburetor and clean all
internal passages.
1
Replace fuel filter.
d.
Repair vacuum leak.
1
a.
Adjust carburetor float level.
1
1
b.
Replace carburetor float.
1
1
a.
Adjust carburetor float level.
1
1
b.
Adjust carburetor idle and main
adjustment screws.1
1
c.
Disassemble carburetor and clean
all internal passages.
1
1 d. Repair vacuum leak.
2. Drain and replace fuel.
3.
See Engine Block Assembly section.
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