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50:to1
135 to 160 most important thing is that they are all less than 5 psi difference
The dry weight of the 1985 model, 70 hp Evinrude outboard is 257 lbs.
19 degrees
The 1977 model, 70 hp Evinrude outboard requires an NGK BZ7HS-10, or a Champion QL77JC4 Plug gapped to .030 in.
A 70 hp Evinrude outboard, model number E70ELCO, would be a 1985 year model.
It is a 70 HP 1975 Evinrude. The 5 indicates the year. I just bought a1975 Evinrude yesterday & looked up the number.
The 1981 model, 70 hp Evinrude, requires a 50:1 ratio, one pint of 2 cycle oil, to six gallons of fuel.
19 degrees BTDC, + or - 1 degree at WOT. Around 4 degrees ATDC idle timing.
i have a 70hp mercury outboard older late 70's model and the cylinder compression is 135 across the board. it shouldnt be below 100 psi and not more that 15 between any 2 cylinders
The 1975 model, 70 hp Chrysler requires a 50:1 ratio. This is 3 oz. of 2 cycle oil, to each gallon of fuel.
1992