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 TM 5-2805-261-13
Section IV. TROUBLESHOOTING
The tests are grouped by what system they
4-9.
GENERAL. This section contains troubleshooting
belong to. (The fuel system tests are with the
procedures to be performed by organizational maintenance
fuel system.) Within each group the tests are
personnel.
arranged so that the easier tests come before
the harder tests.
4-10.
TROUBLESHOOTING CHART.
C.
CORRECTIVE ACTION. Corrective actions
A.
MALFUNCTION. Malfunctions listed are the
are listed to help you eliminate the
ones most likely to happen. Not all possible
malfunction. Where the corrective action is
malfunctions can be foreseen and listed.
too complicated to be listed in full detail, the
paragraph number of the detailed procedure is
B.
TEST OR INSPECTION. Tests or inspections
given in parentheses.
are listed to help you find the cause of the
malfunction.
Table 4-2. Troubleshooting
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
MANUAL STARTER
1.
STARTER DOES NOT ENGAGE FLYWHEEL WHEN TRYING TO START MOTOR.
Check for broken pawl.
Replace pawl (para 4-15).
IGNITION SYSTEM
2.
IGNITION SYSTEM MALFUNCTIONING.
Step 1.
Check ignition system (para 4-11).
Replace components as necessary.
FUEL SYSTEM
3.
FUEL SYSTEM MALFUNCTIONING.
Step 1.
Check fuel delivery (para 4-24).
a.
Disconnect fuel hose at motor. Squeeze primer bulb until definite pressure is felt.
Check hose for leaks. Replace if necessary (para 4-25).
b.
Connect fuel hose at motor. Squeeze primer bulb until definite pressure is felt. Inspect
for leaks at hoses, filter, fuel pump, and carburetor. Repair as necessary (para 4-24 thru
c.
If you cannot get a definite pressure on the primer bulb, and there is no leakage
elsewhere, replace the primer bulb valve (para 4-25).
Step 2.
Inspect carburetor throat for flooding (squeeze primer bulb and observe carburetor throat.)
Service carburetor (para 4-27).
Step 3.
Test fuel pump.
Connect fuel pump gage to discharge side of fuel pump. Crank engine and observe gage.
Gage should read a minimum pressure of 2.5 psi (17 kPa).
Replace fuel pump (para 4-26).
4-3
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