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 TM 5-2805-261-13
4-38. ENGINE TEMPERATURE TEST
This task covers:
Testing engine temperature
INITIAL SETUP :
Tools:
Equipment Condition:
163 (73 ) markal thermomelt stik
F
C
Follow procedure
Materials/Parts:
None
Personnel Required:
Approximate Time Required (minutes):
1 Mechanic
20
LOCATION/ITEM
ACTION
REMARKS
TEST
NOTE
This test is best performed on an operating engine, on a boat. If this is not possible run motor in test tank at
3/4 throttle for at least 5 minutes.
1.
Engine
Make a mark on the surface
with the stik.
NOTE
The mark will be dull and
chalky in appearance. When
the surface reaches the rated
temperature of the stik, the
mark will melt, becoming
liquid and glossy in appear-
ance.
2.
Mark
If the mark melts, the cool-
ing system of the motor is
Figure 4-36. Markal thermomelt stik
not functioning properly.
a.
Check the inlet screen.
See para 4-37.
b.
Replace the water pump.
See para 4-36.
4-63/(4-64 blank)
4-63/(4-64 blank)
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