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.
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
Joan Coles has written: 'Seloc's OMC cobra stern drive, 1985-1987' -- subject(s): Handbooks, manuals, Inboard-outboard engines, Maintenance and repair 'Seloc's Mercury outboard' -- subject(s): Handbooks, manuals, Maintenance and repair, Outboard motors 'Seloc Johnson/Evinrude outboards 1956-70 repair manual' -- subject(s): Handbooks, manuals, Maintenance and repair, Outboard motors 'Seloc's Mercury/Mariner outboard' -- subject(s): Handbooks, manuals, Maintenance and repair, Outboard motors 'Seloc's Volvo Penta stern drive' -- subject(s): Handbooks, manuals, Inboard-outboard engines, Maintenance and repair 'Seloc's Force Outboard Repair Manual' 'Seloc's OMC stern drive, 1964-1986' -- subject(s): Handbooks, manuals, Inboard-outboard engines, Maintenance and repair 'Seloc's OMC Cobra and King Cobra stern drive, 1985-1995' -- subject(s): Handbooks, manuals, Inboard-outboard engines, Maintenance and repair 'Seloc's Mercruiser stern drive tune-up and repair manual, includes Alpha and Bravo, 1964-1991' -- subject(s): Handbooks, manuals, Inboard-outboard engines, Maintenance and repair 'Seloc's Johnson/Evinrude outboard' -- subject(s): Handbooks, manuals, Maintenance and repair, Outboard motors 'Seloc Johnson/Evinrude outboards 1971-89 repair manual' -- subject(s): Handbooks, manuals, Maintenance and repair, Outboard motors