Latest News: Forums Cruising Novel Selva 4-stroke outboard Re: Re: Novel Selva 4-stroke outboard


The mixture is that of a 2 stroke but it fires every fourth stroke with the aid of a valve train. It will smoke the same as a two stroke but on paper it’s a four stroke. I think it may be called ”taking advantage of a loophole”.

The efficiency will be down to the fact that it will run lean and therefore hot. Modern engines have pressurised coolant so they can run leaner and hotter without boiling. Probaly why the Seva is air cooled. I guess you could save on the weight of a cooker in the boat and fry your bacon and eggs on the Selva’s head!

It’s a good idea to put the right amount of oil in a 2 stroke mix as too much oil will NOT have the advantage of extra lubrication but WILL make the tired old smoker run lean and hot.