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TM5-4210-229-14&P
Table 5-1. Direct Support Troubleshooting Chart (Continued).
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
8.
RESCUE SAW ENGINE FAILS TO START OR STARTS WITH DIFFICULTY
Step 1.
Check for empty fuel tank.
Fill fuel tank.
Step 2.
Check for not enough choke.
Pull starter cord repeatedly with full choke.
Step 3.
Check for too much choke.
Open choke flap and pull cord again.
Step 4.
Check for wet spark plug.
Remove plug, wash, blow dry.
Step 5.
Check if choke flap has not opened after engine fired for the first time.
Open choke flap and pull cord again. If this does not help, remove and clean spark plug.
9.
RESCUE SAW ENGINE RUNS BUT WITHOUT POWER AND RACES WHEN IT IS OFF LOAD
Check if fuel mixture is too lean.
Turn fuel mixture adjuster screw slightly in counterclockwise direction.
10.
RESCUE SAW ENGINE DOES NOT ACCELERATE FROM IDLING SPEED
Step 1.
Check if engine is not warmed up.
Run engine until warm and then adjust fuel mixture adjuster screw if required.
Step 2.
Check if low speed mixture is too lean.
Turn fuel mixture adjuster screw slightly in counterclockwise direction.
11.
RESCUE SAW ENGINE DOES NOT ACCELERATE FROM IDLING SPEED AND IS SMOKEY
Step 1.
Check if air cleaner is blocked.
Clean air cleaner and then adjust fuel mixture adjuster screw if required.
Step 2.
Check if low speed fuel mixture is too lean.
Turn fuel mixture adjuster screw slightly in counterclockwise direction.
12.
RESCUE SAW ENGINE STOPS WHEN SAW IS TURNED
Check if low speed mixture is too rich.
Turn fuel mixture adjuster screw slightly in the clockwise direction.
13.
RESCUE SAW ENGINE RUNS ROUGHLY OR MISFIRES
Step 1.
Check if air cleaner is blocked.
Clean air cleaner.
Step 2.
Check if spark plug is oily or sooty.
Clean and adjust spark plug.
Step 3.
Check for loose ignition cable.
Attach cable properly.
Step 4.
Check for proper carburetor adjustment.
Adjust carburetor (paragraph 5-7).
Step 5.
Check for water or dirt in the fuel.
Clean tank and fuel lines.
14.
RESCUE SAW ENGINE OVERHEATS
Check for blocked cylinder cooling vanes.
Clean cooling air passages.
5-5
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