TM 5-6115-405-15
Probable cause
Possible remedy
3-16. Engine Misfires
Choke closed ......................Push in choke button fully
to open choke.
Probable cause
Possible remedy
Carburetor improperly
Adjust carburetor (para
Choke closed .....................Push in choke button fully
adjusted.
3-23).
to open choke.
Carburetor improperly
Adjust carburetor (para
or cylinder exhaust
exhaust manifold, and
adjusted.
3-23).
port clogged.
cylinder exhaust port
Spark plug fouled ...............Clean and regap or
replace spark plug (para
Cylinder fins clogged ..........Clean cylinder fins.
Inadequate ventilation .........Provide adequate cooling
Shielded ignition cable,
Replace defective parts
air flow (para 2-5).
ignition coil, or breaker
(report this condition to
Engine speed incorrect
Adjust governor (para
points defective.
direct support mainte-
nance).
Engine or generator
Perform overhaul (report
parts binding.
this condition to direct
3-17. Excessive Smoke from Muffler
support maintenance).
Air leak in fuel line from
Inspect and replace fuel
Probable cause
Possible remedy
fuel tank to carburetor.
line if required (para
Excessive oil in fuel
Drain fuel tank and fill
mixture.
with correct fuel mixture
Ruptured fuel pump
Disassemble carburetor
diaphragm.
and correct trouble
Carburetor set too rich.........Adjust carburetor (para
(report this condition to
3-28).
direct support mainte-
nance).
Air cleaner clogged ............Inspect air cleaner and
Spark plug fouled ................Clean and regap or replace
clean an necessary.
spark plug (para 3-11).
Section V. RADIO INTERFERENCE SUPPRESSION
Methods used include shielding the ignition and high-
3-18. Definitions
a. Interference. The term "interference" as used
straps, and using capacitors and resistors.
herein applies to electrical disturbances in the radio
3-20. Interference Suppression Components
set and which may interfere with the proper operation of
radio receivers or other electronic equipment, or enable
The suppression components used on the generator
the enemy to locate the equipment.
set are the shielded ignition cable (fig. 1-1) and the
b. Interference
Suppression.
The
term
integral suppressor-type spark plug.
"interference suppression" as used herein applies to the
methods used to eliminate or effectively reduce radio
3-21. Replacement of Suppression Components
interference generated by the' generator set.
Replacement of the shielded ignition cable is
beyond the scope of organizational maintenance
3-19. General Methods Used
to
Attain
Proper
personnel.
Refer to direct support maintenance
Suppression
instructions given in chapter 6. For replacement of the
spark plug, refer to paragraph 3-11.
Essentially, suppression is attained by providing a
low resistance path to ground for stray currents.
Section VI. CARBURETOR
3-22. General
3-23. Carburetor Adjustment
The carburetor is located under the air
Note.
cleaner element cover directly below the air cleaner
Before attempting to remedy a
element. (fig. 33.)
trouble by adjusting the carburetor,
be sure that the air cleaner element
is clean, and the fuel is fresh, clean,
and correctly mixed.
3-8