A 25 hp Evinrude, model number E25RCNB, would be a 1982 year model.
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Look up and see answer entered for "25 hp Evinrude". It is the same.
I have a 1988 25 hp LS Evinrude pull start and I weighed it at 123 lbs.Retired auto tech
The correct spark plug gap for the 1994 model, 25 hp Evinrude outboard is .030 in.
A 25 hp Evinrude outboard, model number E25TECUR, would be a 1987 year model.
The 1979 model, 25 hp Evinrude requires a 50:1 ratio, one pint of 2 cycle oil, to six gallons of fuel.
You can find an external wiring harness for a 1971 Evinrude 25 Hp outboard at different boating shops. You can also check with the manufacturer.
The year model for a Evinrude outboard engine is determined from the engine model number. Yes, the 25 hp can be easily converted to electric start.
The Approach is the difference between wet bulb temperature and outlet water temperature from cooling tower. That means , in this case, Approach = 35-25=10 degrees.
0.8mm or 0.030 US
If you will go to Crowley Marine you can look up just about any old outboard motor. There is a diagram there for the 1971 25 hp Evinrude and if you will look there is a plate on the right side looking at the motor from the propeller end just below where the gearcase extension bolts on. It has several small holes in it and this is the water intake. On the Crowley gearcase drawing it is part #19.