Piper CHEROKEE WARRIOR PA-28-151 1995 Maintenance Manual page 286

PIPER CHEROKEE WARRIOR SERVICE MANUAL
TABLE VIII-V. ENGINE TROUBLESHOOTING CHART (cont.)
Trouble
Low power and uneven running
engine (cont.).
Failure of engine to develop full
power.
Rough running engine.
Revised: February 28, 1995
Cause
Improper engine operation.
Improper grade of fuel.
Magneto not working properly.
Defective ignition wire.
Defective spark plug terminal
connectors.
Restriction in exhaust system.
Improper ignition timing.
Throttle lever out of adjustment.
Leak in induction system.
Restriction in carburetor air
scoop.
Improper fuel.
Faulty ignition.
Cracked engine mounts.
Unbalanced propeller.
Bent propeller blades.
Defective mounting bushings.
1L22
Island Enterprises
Remedy
Check entire engine.
Fill tank with recommended fuel
grade.
Check timing of magneto.
Check wire with electric tester.
Replace defective wire.
Replace connectors on spark plug
wire.
Check for loose muffler baff l e s .
Check magnetos for timing
and synchronization.
Adjust throttle lever.
Tighten all connections, and
replace defective parts.
Examine air scoop and remove
restriction.
Fill tank with recommended fuel.
Tighten all connections.
Check system. Check ignition
timing.
Repair or replace engine mount.
Remove propeller and have it
checked for balance.
Check propeller for blade track.
Install new mounting bushings.
POWER PLANT