Installation & Operation Manual
O-360 and IO-360 Series Engines
2
© March 2004 Superior Air Parts Inc. Chapter 7 • Abnormal Operating Procedures
2. ENGINE WILL NOT START
3. ROUGH IDLING
Table 7-2 • Engine Will Not Start
Probable Cause Correction
No Fuel Fill with fuel
Excessive Priming Leave ignition "Off" and mixture control in "Idle
Cut-Off", open throttle and clear cylinders by
cranking a few seconds. Turn ignition switch
"On" and proceed to start.
Defective ignition wire Check with electric tester, and replace any
defective wires.
Dead battery Replace battery.
Malfunction of magneto breaker Clean points. Check internal timing of
magnetos
Lack of sufficient fuel flow Disconnect fuel line and check fuel flow
Water in fuel injector or carburetor Drain fuel injector or carburetor and fuel lines.
Internal failure Check oil screens for metal particles. If found,
complete overhaul of the engine may be
required.
Table 7-3 • Rough Idling
Probable Cause Correction
Incorrect idle mixture Adjust mixture
Leak in the induction system Tighten all connections in the induction system.
Replace any damaged parts.
Incorrect idle adjustment Adjust throttle stop to obtain correct idle.
Uneven cylinder compression Check condition of piston rings and valve seats
Faulty ignition system Check entire ignition system