TM 5-3740-218-13&P
Table 4-2. Unit Troubleshooting
Malfunction
Test or Inspection
Corrective Action
2. ENGINE IS HARD TO START.
Step 1.
Check fuel supply.
Check fuel tank and fill with fuel (item 19, Appendix E).
Check that fuel valve is completely open. Open fuel valve.
Restart.
Step 2.
Remove spark plug and inspect electrodes.
WARNING
Death or serious injury could result by repeated and/or prolonged
breathing and/or skin contact of drycleaning solvent (PD-680). Use in a
well-ventilated area. Do not use near open flame or in excessive heat.
The flash point of this solvent is 100F-183F (38C-59C).
If spark plug is dry, check for blockage of fuel tube and
screen:
Turn off fuel valve and remove sediment cup. Clean sediment
cup and screen with drycleaning solvent (item 59, Appendix E).
If spark plug is wet, check vacuum tube for vacuum. If no
vacuum, replace vacuum tube and dashpot check valve
Step 3.
Check for partially discharged battery.
Replace battery (para 4-33).
Step 4.
Check for defective hand control unit.
Replace hand control unit (para 4-38).
Step 5.
Check for defective battery cables or corroded terminals.
Clean and make sure battery cables are securely connected
and corrosion free.
Replace cables if defective (para 4-31).
Step 6.
Check for defective spark plug.
Remove and replace spark plug (para 4-25). Set gap to 0.039 in.
