This is a 1973 Evinrude Norseman 40 hp. The 3 in the model number tells you it's a 1973.
Look up and see answer entered for "25 hp Evinrude". It is the same.
For the 1995 model 40 hp Evinrude, mix at a 50:1 ratio.
An Evinrude outboard, model number 35530, is a 1962 year model, 40hp engine.
The earlier model 40 hp Johnson and Evinrude outboards use a special flush adapter. It fits over the water pickup screen in the side of the exhaust horn, located under the backside of the antiventilation plate, just above the propeller. I doubt that this flusher is still available on the market, so probably your best bet would be to use a large garbage barrel. I have, and on occasion still do, use this method when serviceing the older J/E outboards.
Certain models of Johnson and Evinrude engines are not equipped with a tell tale water indicater outlet. These models discharge cooling water out the exhaust passages, and or the propeller.
The dry weight of a 1983 model, 40hp Mercury outboard, is 156lbs.
The dry weight of a 1992 40hp Johnson is between 180 and 190lbs. depending on the model.
The maximum speed of the 1965 Fiat 850 Multipla 4cyl 40hp is 78 mph.
how do u check timing in a 40 hp yamaha 2 stroke
This sounds like your engine warning system is trying to alert you to a cooling problem. Overly high running temperatures are deadly to an outboard, and can lead to very expensive repair costs. Check to see that the thermostat is operating properly, and that the engine is running in an acceptable heat range.
50:1