TM 5-6115-405-15
Caution:
c. Move the toothed end of governor shaft guide in
Under no circumstances should the
small increments until speed is adjusted as required.
speed be changed by pushing
Note the direction of movement for increase and
against the carburetor linkage.
decrease as indicated on figure 3-5.
Moving this linkage even for an
d. When speed is correct, maintain slight pressure
instant will cause immediate damage
on the governor shaft guide and tighten the two outer
to the governor.
No. 832 screws.
a. Allow the generator set to operate until it is
Note.
warm and has stable output.
Do not loosen or attempt to adjust
b. Keep a slight pressure on governor shaft guide
the throttle return spring clamp
(fig. 3-5) to prevent unwanted movement, and loosen
screws
inside
the
carburetor
the two outer No. 8-32 screws.
chamber assembly.
Caution:
Do not loosen the center No. 440
screw or the governor shaft will fall
into the engine housing.
Section IV. TROUBLESHOOTING
3-13. General
Probable cause
Possible remedy
This section provides information useful in
Breaker points defective
Regap or replace breaker
diagnosing and correcting unsatisfactory operation or
or improperly gapped.
points (report this condi-
failure of the generator set and its components. Each
tion to direct support
trouble symptom stated is followed by a list of probable
maintenance).
causes.
The possible remedy recommended is
Capacitor defective .............. Replace capacitor (report
described opposite the probable cause. Any trouble
this condition to direct
beyond the scope of organizational maintenance shall
support maintenance).
be reported to direct support maintenance.
Carburetor dirty or
Clean or replace defective
defective.
parts (report this condi-
3-14. Engine Fails to Start or Starts with Difficulty
tion to direct support
maintenance).
Probable cause
Possible remedy
Starter binding or
Disassemble and correct
Ignition switch not set
Set ignition switch to ON.
defective.
trouble (report this
correctly.
condition to direct support
No fuel in tank ....................Fill fuel tank (para 2-5c).
maintenance).
Fuel tank selector valve
Set valve as required
set to incorrect
(para 2-11a).
Note.
position.
A quick check of generator set condition for
Spark plug fouled with
Clean or replace spark
troubleshooting purposes is to disconnect
fuel or excessive
plug (para 3-11).
shielded ignition cable from spark plug (para
carbon.
3-11a), and hold end of the cable
Spark plug gap incorrect .....Regap spark plug (para
approximately 1/4 inch from rear end of
spark plug while pulling starter handle (this
Muffler clogged ...................Clean muffler (para 3-8).
may require two men). If sparks do not
Exhaust manifold or
Clean exhaust manifold
jump, the trouble is in the electrical system.
cylinder exhaust port
and cylinder exhaust
(Report this condition to direct support
clogged;.
port (para 3-9).
maintenance.) If sparks jump, replace spark
Air cleaner element
Clean or replace air cleaner
plug. If this does not correct the problem,
clogged.
element (para 3-7).
the trouble is in the fuel system. Check fuel
Water or dirt in fuel
Drain, clean, and refill fuel
lines, fuel tank, carburetor, etc.
tank.
tank with correct fuel
mixture (para 2-5c).
3-15. Engine Overheats or Locks Power
Engine needs choking ........... Pull choke button out and
restart.
Probable cause
Possible remedy
Fuel tank cap valve
Remove cap and restart.
Incorrect fuel mixture ..........Drain, clean, and refill fuel
clogged.
If engine runs better,
tank with correct fuel
replace fuel tank cap.
mixture (para 2-5c).
3-7
