TM 3-4230-218-12&P
Table 3-1.
Operator Troubleshooting - Continued
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
3.
LOW
Step
ENGINE POWER OR SPEED - Continued.
4.
Check for presence of 2-cycle oil in fuel.
The 2-cycle oil is tinted and will produce an aqua-tint to the gaso-
line when mixed.
A slight tint to fuel, however, does not mean that
oil has been added, as some gasoline is tinted.
If in doubt of the
fuel mix, pour the engine fuel mix into the burner fuel can and
re-mix fuel for the engine.
Refer to page 2-20.
If fuel is properly mixed, notify organizational maintenance.
4.
ENGINE BACKFIRES.
Step 1.
Check for contaminated or wrong grade of fuel.
If fuel is contaminated or wrong grade, replace fuel with fresh,
uncontaminated fuel of correct grade.
(See MALFUNCTION 2, Step
7).
If fuel is not contaminated and is of correct grade, proceed to Step
2.
Step 2.
Check engine spark plug for fouling.
3-6
If plug is
If plug is
fouled, clean or replace plug.
not fouled, notify organizational maintenance.
5.
ENGINE OVERHEATS/RUNS IRREGULARLY.
Step 1.
Check for correct fuel mixture.
If fuel mixture is incorrect, use correct oil and gasoline mixture (see
MALFUNCTION 3, Step 4).
If fuel mixture is correct, proceed to step 2.
Step 2.
Check to see if engine cooling fins are blocked.
Engine is air cooled; cylinder fins and head fins must be free of
debris.
If blockage exists use small screwdriver to clean debris from around
cooling fins.
Excessive blockage may require removing engine fan
cover for adequate cleaning.
