30 thousands of an inch
The stator is usually underneath the flywheel and produces power for the power packs to fire the spark plugs
The spark plugs on a 1988 model, 70hp Johnson outboard, should be gapped to .030in.
Johnson 6hp spark plug gap
The 25 hp Johnson outboard runs a plug gap of .030 in.
1984 Johnson 6 HP
.03
RJ8C Champion
.030
.030
The 1955 model, 3 hp Johnson outboard, requires a spark plug gap of .030 in.
The recommended plug gap for the 1972 model, 20 hp Johnson outboard is .030 in.
The correct spark plug gap for the 1979 model, 100 hp Johnson outboard is .030 in.