Cessna 188 Series Service Manual page 218

MODEL 188 & T188 SERIES SERVICE MANUAL
11B-10. TROUBLE SHOOTING.
TROUBLE PROBABLE CAUSE REMEDY
ENGINE FAILS TO START.
Engine flooded or improper use Refer to the Information Manual
of starting procedure. for correct starting procedures.
Defective aircraft fuel system. Refer to Section 12.
Fuel tanks empty. Service fuel tanks.
Spark plugs fouled or defective. Remove, clean, inspect and regap.
Use new gaskets. Check cables
to presistently fouled plugs.
Re-
place if defective.
Magneto impulse coupling failure. Repair o- install new coupling.
Defective magneto switch or Repair or replace switch and leads.
grounded magneto leads.
Defective ignition system. Refer to paragraph 11-61.
Induction air leakage. Correct cause of air leakage.
Clogged fuel screen in fuel control Remove and clean. Replace
unit or defective unit. defective unit.
Clogged fuel screen in fuel Remove and clean screen. -Replace
manifold valve or defective defective valve.
valve.
Clogged fuel injection lines or
Remove and clean lines and nozzles.
discharge nozzles. Replace defective units.
Defective auxiliary fuel pump. Refer to Section 12.
Engine-driven fuel pump not Install new engine-driven
permitting fuel from auxiliary fuel pump.
pump to bypass.
Vaporized fuel in system. (Most Refer to the Information Manual
likely to occur in hot weather with
for correct starting procedures.
a hot engine.)
ENGINE STARTS BUT DIES. OR Propeller control in high pitch Use low pitch (high rpm) position
WILL NOT IDLE PROPERLY. (low rpm) position. for all ground operations.
Improper idle speed or idle Refer to paragraph 11B-39.
mixture adjustment.
Defective aircraft fuel system. Refer to Section 12.
Spark plugs fouled or defective. Remove, clean, inspect and regap.
Use new gaskets. Check cables to
persistently fouled plugs. Replace
if defective.
Water in fuel system. Drain fuel tank sumps, lines
and fuel strainer.
Defective ignition system. Refer to paragraph 11-61.
11B-4
Revision 1