The spark plugs on a 1988 model, 70hp Johnson outboard, should be gapped to .030in.
0.035 is the gap size
23 years old made in 1988
The fuel to oil ratio for a 1988 model, 8hp Johnson outboard, would be 50:1, six gallons of fuel, to one pint of two cycle oil.
50:1 i have a 1988 johnson 88 spl thats what i run and it runs sweet
Model number J20ELCCA is a 20 hp Johnson outboard, electric start, long shaft, 1988 model, outboard engine.
Thre is no gap on the plug as it a surface fire plug.
1988
1988
The 1988 model, 28hp Johnson outboard, requires a 50:1 fuel to oil ratio. This is roughly, one pint of 2 cycle oil, to six gallons of fuel. If you have the same motor I have which is a 1988 Johnson 28 hp 2 stroke then the mixture is 100:1. The answer provided above is wrong. This is 8 ounces of 2 stroke oil to 6 gallons of gas. I have had this motor since it was new and it still runs great today.
in the box just above your top spark plug (four flat head screws hold it in)
just stay with the 50 to 1 ratio and you can't go wrong.
1988-89