Textron LYCOMING O-320 Series - Oil System Issues

LYCOMING OPERATOR’S MANUAL SECTION 6
O-320 SERIES TROUBLE-SHOOTING
TROUBLE PROBABLE CAUSE REMEDY
Failure of Engine to Develop Leak in induction system Tighten all connections and
Full Power replace defective parts.
Throttle lever out of adjustment Adjust throttle lever.
Improper fuel flow Check strainer, gage and flow
at the fuel inlet.
Restriction in air scoop Examine air scoop and remove
restrictions.
Improper fuel Drain and refill tank with recom-
mended fuel.
Faulty ignition Tighten all connections. Check
system with tester. Check
ignition timing.
Rough Engine Cracked engine mount Replace or repair mount.
Defective mounting bushings Install new mounting bushings.
Uneven compression Check compression.
Low Oil Pressure Insufficient oil Fill to proper level with recom-
mended oil.
Air lock or dirt in relief valve Remove and clean oil pressure
relief valve.
Leak in suction line or pressure Check gasket between accessory
line housing and crankcase.
High oil temperature See “High Oil Temperature” in
“Trouble” column.
Defective pressure gage Replace.
Stoppage in oil pump intake Check line for obstruction. Clean
passage suction strainer.
High Oil Temperature Insufficient air cooling Check air inlet and outlet for
deformation or obstruction.
Insufficient oil supply Fill to proper level with specified
oil.
6-3