19 degrees BTDC, + or - 1 degree at WOT. Around 4 degrees ATDC idle timing.
19 degrees
The dry weight of the 1985 model, 70 hp Evinrude outboard is 257 lbs.
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.
50:to1
135 to 160 most important thing is that they are all less than 5 psi difference
The 1981 model, 70 hp Evinrude, requires a 50:1 ratio, one pint of 2 cycle oil, to six gallons of fuel.
The compression for a 1984 70 hp Evinrude outboard motor should typically be between 100 and 130 psi per cylinder. It's important that the compression is relatively consistent across all cylinders, with no more than a 10% variance between them. If the compression is significantly lower than this range, it may indicate issues such as worn rings, damaged pistons, or other mechanical problems. Always refer to the specific service manual for your model for the most accurate specifications.
That in for a 1984 Johnson 70 hp outboard engine.
The plug gap for a 70 Johnson would be .035 - .040.
It is a 70 HP 1975 Evinrude. The 5 indicates the year. I just bought a1975 Evinrude yesterday & looked up the number.
1992