TM 5-3810-294-34
Table 2-1. Troubleshooting - Continued
Malfunction
Probable Cause
Corrective Action
springs, or valve guides as
required (chap. 4 and 13).
a. Fuel filter is clogged.
a. Refer to TM 5-3810-294-10 and
11.
Engine lacks power
service fuel filter.
b. Restricted air intake.
b. Refer to TM 5-3810-294-10 and
service air cleaner.
c. Fuel pump not operating properly. c. Refer to TM 5-3810-294-20 and
replace fuel pump.
d. Dirty or faulty carburetor.
d. Refer to TM 5-3810-294-20 and
clean or replace carburetor.
e. Refer to TM 5-3810-294-20 and
e. Faulty spark plugs.
replace plugs.
f. Ignition points burned, pitted, or
f. Refer to TM 5-3810-294-20 and
sticking.
replace points.
g. Faulty ignition or timing.
g. Refer to TM 5-3810-294-20 and
inspect and/or replace points,
plugs, and other ignition com-
ponents.
h. Excessive load on engine,
h. This is a serious condition which
can be corrected only by overhaul
of the item which is faulty.
Determine cause and overhaul
the overheated binding assembly.
i. Clutch slipping.
i. Refer to TM 5-3810-294-20 and
adjust clutch. Replace clutch
drive plate lining (chap. 14, sec.
III.)
j. Broken or worn valves or piston
j. Refer to TM 5-3810-294-20 and
rings.
check compression. Repair or
replace rings and/or valves as
required (chap. 4 and 13).
k. Valves stuck (open or closed) in
k. Free valves and replace faulty
valve guides.
valves, springs, or valve guides as
required (chap. 4 and 13).
l. Improper fuel mixture.
I. Repair carburetor or fuel pump
(chap. 3 and 12).
a. Dirty fuel or fuel tank.
a. Refer to TM 5-3810-294-10 and
12.
Engine "cuts out" suddenly
under load.
drain fuel
tank. Refill with proper fuel.
b. Restricted fuel line.
b. Refer to TM 5-3810-294-20 and
replace line.
c. Faulty fuel pump.
c. Refer to TM 5-3810-294-20 and
replace fuel pump.
Engine tends to stall at full load. a. Fuel filter is clogged.
a. Refer to TM 5-3810-294-10 and
13.
service fuel filter.
b. Refer to TM 5-3810-294-10 and
b. Restricted air intake.
service air cleaner.
c. Faulty fuel pump.
c. Refer to TM 5-3810-294-20 and
replace fuel pump.
14.
Engine exhaust is smoky.
combustion due to poor spark
replace spark plugs and adjust
plugs or ignition timing.
ignition timing.
b. If exhaust is blue, the engine is
b. Repair engine as required (chap. 4
burning oil due to leaking oil into
and 13).
exhaust manifold or blow-by past
piston rings.
15.
Engine overspeeds.
Incorrect engine speed governor
Refer to TM 5-3810-294-20 and
adjustment
adjust speed governor.
a. Improper clutch, adjustment.
a. Refer to TM 5-3810-294-20 and
16.
Engine clutch overheats or
jump out of engagement.
adjust clutch.
b. Clutch plates worn.
b. Repair clutch (chap 14).
Batteries discharge with engine a. Loose connections.
a. Tighten connections.
17.
b. Alternator V-belt loose.
b. Refer to TM 5-3810-294-10 and
running.
adjust V-belt tension.
c. Faulty alternator.
c. Refer to TM 5-3810-294-20 and
replace alternator.
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