TM 5-3895-360-13
4-6. TROUBLESHOOTING SYMPTOM INDEX.
Number
Promblem
Page
Problem Title
Number
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
ENGINE
Engine Will Not Start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ......
Engine is Hard To Staff . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...
Engine Starts But Will Not Continue To Run . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Engine Lacks Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Engine Stalls Under Load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Engine Misses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...
Engine Overheats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Engine ls Noisy or Knocking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Engine ContinuesTo Run After Shoting Switch Is Pushed . . . . . . . . . . . . . . . . . . . .
Engine Has Poor High Speed Perfomance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Engine Has Poor Acceleration.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Table 4-2. Unit Troubleshooting.
4-6
4-7
4-7
4-8
4-9
4-9
4-10
4-10
4-10
4-10
4-10
PROBLEM
PROBABLE CAUSE
TEST PROCEDURE/REMEDY
ENGINE
1. Engine will not start.
a. Spark plug is not firing.
a. Check for incorrect, defective, or
fouled spark plug. Clean and ad-
just spark plug gap as neces-
sary. Check for spark by perform-
ing the following. Remove spark
plug (see paragraph 9-3) and at-
tach lead wire and ground plug
against cylinder. Crank engine to
determine if spark will jump gap
on plug. If no spark or weak
spark, remove flywheel (see
paragraph 9-2) and check wiring,
connections,
hi-tension lead
wire, lead wire spark plug con-
nector, coil, condenser, and
points.
b. Carburetor is out of adjustment.
b. Adjust carburetor (see paragraph
7-2).
c. Fuel line is pinched.
c. Replace fuel line (see paragraph
7-6).
4-6
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