The two-stroke Yamaha models of the 80s and 90s are reputed to be hard guys.
Just what I need for my 4m inflatable honwave, in which I sometimes embark the family. I can not afford to be lost in the sea because of engine failure. It has ever happened to me, going alone, nothing serious. But if happen going with my wife or the kids ... I know it's over for me to navigate. She is very scared.
I have recently been offered an enduro model of 20 hp from the year 1991.
The engine has been little used, and has only sailed in fresh water. By its appearance it would be said that it is very well preserved ... a moment ¿20 hp? But if the enduro is only made in 15 or 25 hp ... I think they have been wrong. Commenting with the owner, he replies that he was told by the nautical mechanic who checked the engine. He will ask again.
This is the "enduro" model
Indeed, after asking again, the mechanic continues to affirm that "it is an enduro, a reliable and robust engine like none, almost unbreakable". But in the sheet it says that it is a model 20C (6A9). It's a weird, unusual model. The 8hp Yamaha CMH model is a legendary engine for its reliability. I understand that this 20C is the same design of the "C series", and maybe that is why the mechanic has been confused. It is not an enduro, but it may be a very safe engine.
The label showing a "20CM 6A9" model
I have a Yamaha 25 BMHS from 2002.
This is a model of the "B series" from Yamaha, whose specifications are more sporting. The two engines weigh almost the same, about 50 kg. But the BMHS gets those extra 5hp versus the 20hp of the 20CM. It's another engine design, obviously.
It's not the mine but this one is a 25BMH
And here my great doubt, which one to stay with? Are there significant differences in reliability between the two engines
? Which is better in that it does not break while being at sea? I already know that these things depend above all on how careful the engine is and how it has been used. But it is also clear that there are more delicate outboards, while others like enduro do not break even with an intensive and neglected use. I guess the 20CM will be a rude boy, more than the 25BMHS, but I really do not know if there are significant differences.
Anyway, this is the dilemma I have. Welcome any opinion or advice. And very grateful.