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Johnson 6hp spark plug gap
.030
The required spark plug air gap for the 83 model, 15 hp Johnson is .030 in.
1984 Johnson 6 HP
The plug gap for a 70 Johnson would be .035 - .040.
.030
.030
The 25 hp Johnson outboard runs a plug gap of .030 in.
.030 .030
The recommended plug gap for the 2000 model, 4 hp Johnson is .030 in.
The plug gap for a 94 model, 50 hp Johnson is .030-.035 in.
The spark plugs on a 1988 model, 70hp Johnson outboard, should be gapped to .030in.