Excessive Oil Consumption; Cold Weather Difficulties; Engine Does Not Stop - Lycoming O-290 Operator's Manual

SECTION 6
TROUBLE-SHOOTING
TROUBLE

Excessive Oil Consumption

Cold Weather Difficulties

Engine Does Not Stop

6-4
PROBABLE CAUSE
Low grade of oil.
Failing or failed bearing.
Worn piston rings.
Incorrect installation of piston
rings.
Cold oil.
Inaccurate pressure readings.
Weak battery.
Overpriming.
Linkage does not permit full
travel of "Idle Cut-Off".
Leaking "Idle Cut-Off".
Faulty ignition switch.
LYCOMING OPERATOR'S MANUAL
O-235 AND O-290 SERIES
REMEDY
Fill tank with oil conforming to
specification.
Check sump for metal particles.
Install new rings.
Install new rings.
Move aircraft into a heated
hangar. Heat oil.
In extreme cold weather, oil
pressure readings up to
approximately 100 lbs. do not
necessarily indicate
malfunctioning.
Install fully charged battery.
Leave throttle open and ignition
"off". Put mixture control in "Idle
Cut-Off" and crank until engine
starts. Immediately return to "full
rich" mixture.
Readjust linkage for full travel.
Overhaul carburetor.
Check ground wires, overhaul
switch.