Textron Lycoming O-235-C User Manual

SECTION 6 LYCOMING OPERATOR’S MANUAL
TROUBLE-SHOOTING O-235 AND O-290 SERIES
TROUBLE PROBABLE CAUSE REMEDY
Low Power and Uneven Running Mixture too rich; indicated by
sluggish engine operation, red
exhaust flange at night. Extreme
cases indicated by black smoke
from exhaust.
Check primer shut-off valve for
leakage. Readjustment of
carburetor by authorized
personnel is indicated.
Mixture too lean; indicated by
overheating or backfiring.
Check fuel lines and filters for dirt
or other restrictions. Readjustment
of carburetor is indicated.
Leaks in induction system. Tighten all connections. Replace
defective parts.
Defective spark plugs. Clean or replace spark plugs.
Poor fuel. Fill tank with fuel of
recommended grade.
Magneto breaker points not
working properly.
Clean points. Check internal
timing of magnetos.
Defective ignition wire. Check wire with electric tester.
Replace any defective wire.
Improper ignition timing. Check magnetos for timing and
synchronization.
Defective spark plug terminal
connectors.
Replace connectors on spark plug
wire.
Incorrect valve clearance. Adjust valve clearance.
Failure of Engine to Develop Full
Power
Throttle lever out of adjustment. Adjust throttle lever.
Leak in the induction system. Tighten all connections, and
replace defective parts.
Restriction in carburetor air
scoop.
Examine air scoop and remove
restrictions. Clean air filter.
Improper fuel. Fill tank with recommended fuel.
Faulty ignition. Tighten all connections. Check
system with tester. Check ignition
timing.
6-2

Textron Lycoming O-235-C Specifications

General

Brand	Textron
Model	Lycoming O-235-C
Category	Engine
Language	English