Trouble Shooting - Cessna 188 Series Service Manual

MODEL 188 & T188 SERIES SERVICE MANUAL
NOTE
The 0-470-S engine is interchangeable with the 0-470-R engine on aircraft serials 18800833 THRU
18801824. Refer to Cessna Single-engine Service Letter SE75-2 Dated January 17, 1975.
11-9. TROUBLE SHOOTING.
TROUBLE PROBABLE CAUSE
REMEDY
ENGINE FAILS TO START. Improper use of starting
Refer to Owner's Manual
procedure.
Defective aircraft fuel system.
Refer to Section 12.
Spark plugs fouled. Remove and clean. Check gaps and
insulators. Use new gaskets.
Check cables to persistently fouled
plugs.
Magneto impulse coupling failure.
Repair or install new coupling.
Defective magneto switch
Repair or replace switch
or grounded magneto leads, and leads.
Defective ignition system.
Refer to paragraph 11-61.
Excessive induction air leaks. Correct cause of air leaks.
Defective carburetor. Repair or replace carburetor.
Water in fuel system.
Drain fuel tank sumps, fuel lines,
fuel strainer and carburetor.
Engine flooded.
Refer to Owner's Manual
Vaporized fuel in system.
Refer to Owner's Manual
ENGINE STARTS BUT DIES,
Improper idle speed or idle
Refer to paragraph 11-43.
OR WILL NOT IDLE. mixture adjustment.
Propeller control set in high
Use low pitch (high rpm) position
pitch position (low rpm).
for all ground operations.
Air leak in intake manifold.
Tighten loose connections or
replace damaged parts.
Spark plugs fouled by oil
Top overhaul engine.
escaping past piston rings.
Water in fuel system.
Drain fuel tank sumps, fuel lines,
fuel strainer and carburetor.
Defective ignition system.
Refer to paragraph 11-61.
Spark plugs fouled or
Clean and regap. Replace
improperly gapped.
if defective.
Defective fuel system.
Refer to Section 12.
11-5