ARMY TM 9-2805-262-14
AIR FORCE TO 38G2-90-1
NAVY NAVFAC P8-613-14E
4-28. Spark Plugs.
This task covers:
General Mechanics Tool Kit (Item 1, Appendix B)
Rags, Wiping (Item 7, Appendix D)
Wrench, Torque (NSN 5120-00-640-6364)
Solvent, Drycleaning (Item 8, Appendix D)
(Item 5, Appendix B)
The following procedures are the same for all spark plugs.
a. Removal. (figure 4-22).
(1) Loosen connector nut (1) and tag and remove high tension cable (2) from spark plug (3).
(2) Remove spark plug (3).
b. Inspection/Test. (figure 4-22).
Drycleaning solvent PD-680 used to clean parts is potentially dangerous to personnel and
property. Avoid repeated and prolonged skin contact. Do not use near open flame or
excessive heat. Flash point of solvent is 100°F-138°F (38°C-60°C).
(1) Clean spark plug (3) in drycleaning solvent, and dry thoroughly.
(2) Inspect spark plug for stripped threads, burnt electrode, broken or cracked ceramic insulator, and
replace a damaged spark plug.
(3) Regap spark plug (3) to 0.028 to 0.033 in. (0.071 to 0.084 cm).
c. Installation. (figure 4-22)
(1) Install spark plug (3) and torque to 23-25ftlb(49115-53580 gr cm).
(2) Install high tension cable (2) and tighten connector nut (1).