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The dry weight of a 1999 model, 70 hp Johnson outboard is 250 lbs.
.030
The dry weight of a 1979 70hp Johnson outboard is 240 to 256lbs. depending on the model.
The spark plugs on a 1988 model, 70hp Johnson outboard, should be gapped to .030in.
The plug gap for a 70 Johnson would be .035 - .040.
The dry weight of an 1986 model, 70hp Johnson outboard, with tilt and trim, is 256 lbs.
For a comprehensive answer to this go to marinedoctor.com Ther is a section dealing with this specif question on a 70 hp johnson.
A 1989 model, 70 hp Johnson outboard requires a 50:1 ratio, one pint of 2 cycle oil, to six gallons of fuel.
A 70hp Mercury outboard, with serial number 5354187, is a 1979 year model.
A 1979 70 HP Johnson burns about 3.5 GPH at 3/4ths WOT
The dry weight of a 1988 model, 70hp Yamaha is 233 lbs.
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