Pilots and A&P mechanics can bond over setting spark plug gaps or tossing them if they fail to meet muster. Diving deeper into the world of aviation spark plugs, we will pull back the cowling and ...

Compared to aviation plugs, which cost $40 to $160 each ... Simply cut the drive end off a ⅞-inch 12-point hex socket and machine the remaining ring just long enough to engage the hex on ...