Piper ARROW III Service Manual

Figure 8-29. Removing Frozen Spark Plug
8-47. INSPECTION AND CLEANING OF SPARK PLUG.
a. Visually inspect each spark plug for the following non-repairable defects:
1. Severely damaged shell or shield threads nicked up, stripped or cross-threaded.
2. Badly battered or rounded shell hexagons.
3. Out-of-round or damaged shielding barrel.
4. Chipped, cracked or broken ceramic insulator portions.
5. Badly eroded electrodes worn to approximately 50% of original size.
b. Clean the spark plug as required, removing carbon and foreign deposits.
c. Set the electrode at .015 to .018 inches.
d. Test the spark plug both electrically and for resistance.
8-48. INSTALLATION OF SPARK PLUGS. Before installing spark plugs, ascertain that the threads within the
cylinder are clean and not damaged.
a. Apply anti-seize compound sparingly on the threads and install gasket and spark plugs. Torque 360 to
420 inch-pounds.
CAUTION
Make certain the deep socket is properly seated on the spark plug hexagon
as damage to the plug could result if the wrench is cocked to one side when
pressure is applied.
b. Carefully insert the terminal insulator in the spark plug and tighten the coupling unit.
Revised: 8/31/77
2B23
CHEROKEE ARROW III SERVICE MANUAL
POWER PLANT - CONTINENTAL

Piper ARROW III Specifications

General

Manufacturer	Piper Aircraft
Model	ARROW III
Engine	Lycoming IO-360-C1C6
Horsepower	200 hp
Maximum Takeoff Weight	2, 750 lb (1, 247 kg)
Seating Capacity	4
Propeller	2-blade, constant speed
Length	24 ft 7 in (7.49 m)