The 140 hp model Johnson outboard runs a plug gap of .030 in.
spark plug gap for 140hp suzuki 4 stroke
The 98 model, 70 hp Johnson 2 stroke outboard, requires a .030 plug gap.
.030
end of compression stroke and power stroke
Johnson 6hp spark plug gap
On the third stroke. 1-Intake stroke. 2-Compression stroke. 3-Power stroke (spark) 4-Exhaust stroke.
The 1955 model, 3 hp Johnson outboard, requires a spark plug gap of .030 in.
The correct spark plug gap for the 1979 model, 100 hp Johnson outboard is .030 in.
The required spark plug air gap for the 83 model, 15 hp Johnson is .030 in.
Its Fords twin plug ignition system - one spark plug fires on the power stroke and the other plug fires on the exhaust stroke to reduce emissions
Generally there is one spark plug per cylinder.
one plug fires on the power stroke and one plug fires on the exhaust stroke to reduce emissions