Lycoming IVO-540 Series, Operator'S Manual

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LYCOMING OPERATOR’S MANUAL SECTION 6
VO, IVO & TIVO-540 SERIES ENGINES TROUBLE-SHOOTING
TROUBLE PROBABLE CAUSE REMEDY
Failure of Engine to Develop Full
Power (Cont.)
Improper fuel flow. Check strainer, gauge and flow at
fuel inlet.
Restriction in air scoop. Examine air scoop and remove
restrictions.
Improper fuel. Drain and refill tank with
recommended fuel.
Faulty ignition. Tighten all connections. Check
system with tester. Check ignition
timing.
Low Oil Pressure Insufficient oil. Check oil supply.
Relief valve out of adjustment. Adjust valve. See Section 5.
Dirt in relief valve. Remove and clean oil pressure
relief valve.
High oil temperatures. See “High Oil Temperature” in
“Trouble” column.
Defective pressure gauge. Replace gauge.
Stoppage in oil pump intake
passage.
Check lines and filter for
obstructions.
Failed or failing bearings. Check sump for metal particles.
High Oil Temperature Insufficient oil supply. Fill oil to proper level.
Improper grade of oil. Replace with oil conforming to
specifications.
Excessive blow-by. Usually caused by worn or stuck
rings. Complete overhaul is
required.
Failing or failed bearings. Examine sump for metal particles.
If found, overhaul of engine is
indicated.
Oil cooler malfunction. Check cooler thermostat; replace
if defective.
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