Trouble
Cause
Remedy
Failure of engine to start.
Lack of fuel.
Check fuel system for leaks. Fill fuel
tank.
Clean dirty lines, strainers,
or fuel cocks.
Underpriming.
Prime with two or three strokes
of primer.
Overpriming.
Open throttle and "unload"
engine by turning in counter-
clockwise direction.
Incorrect throttle setting.
Open throttle to one-tenth of its range.
Defective spark plugs.
Clean and adjust or replace
spark plug or plugs. Refer to
Table I for spark plug gap
adjustments.
Defective ignition wire.
Check with electric tester and
replace any defective wires.
Improper operation of
Check timing of magnetos.
magneto.
Internal failure.
Check oil sump screen for
metal particles. If found,
complete overhaul of the
engine may be indicated.
Improper switch wiring for
Reverse magneto switch wires.
Ieft magneto starting.
Magnetized impulse coupling
Demagnetize impulse couplings.
Ieft magneto only.
Frozen spark plug electrodes.
Replace spark plugs or dry out
removed plugs.
Mixture control in idle cut-off.
Open mixture control.
Shorted ignition switch or
Check and replace or repair.
loose ground
PIPER AIRCRAFT
PA-28-161 CADET
AIRPLANE MAINTENANCE MANUAL
Issued: FEBRUARY. 28, 1989
POWER PLANT
1K15
TABLE VIII-II. ENGINE TROUBLESHOOTING CHART