There are a couple of options... Coil is number one, Or the electronic box......
The spark plug gap for a 2003 Mercury 125hp outboard motor is .040"
The spark plugs on a 1988 model, 70hp Johnson outboard, should be gapped to .030in.
Johnson 6hp spark plug gap
1984 Johnson 6 HP
.030
.030
The 25 hp Johnson outboard runs a plug gap of .030 in.
.030 .030
.030
The plug gap for a 70 Johnson would be .035 - .040.
You have a 1961 Johnson 75hp outboard motor model no v4sl-14b need a owners manual or a print out of the motor so you can order parts for the ignition no spark can anyone help?
The recommended plug gap for the 2000 model, 4 hp Johnson is .030 in.