Originally Posted by simsy
converting a modern tohatsu 4 stroke from 25 to 30 will involve
inlet throttle body
I would guess £800 for parts
converting a yamaha 25hp 2 stroke to 30hp is not possible.. 4 stroke is as above?
A four stroke is out the question due to weight.
Yamaha did do a 25/30 from a two cylinder block, the one on bill highams site. That's too much though!
Yamaha also did a slightly smaller 20/25 again 2 cylinder, I did have one of these once, 1992, but I have seen them maybe up to 2002, not sure if they were done any later. I think these were usually autolube.
I like the merc/mariner 25hp as they are simple, I forgot about the Tohatsu 25 that would also be good.
I like Yamaha and Mariner as I have access to the parts for these, and as mariner rebadge the Tohatsu 25, these are good aswell.