Can you repower a sterndrive engine (v8) with a Rotax supercharged 255 hp engine? Are they durable enough ? Do they have enough Torque?
Do they have the duty cycle? I understand the automotive block engines have a large tolerance for load, however do the Rotax engines capable? Notably, the new Verado engines from Mercury are supercharged engines that are smaller in displacement are very succesful. Is a supercharged 4cyl capable to take over a V8?
Depends, the same old thing keeps poping up time and time again,Think about how hard and how fast the 4 cyl has to work, and how much load and torque has to be put on only 4 cyl, now I'm not saying they cant do the job, but only how long can it keep it up pushing a boat weighing so much and so much gear etc etc, it's like having a horse pulling a cart,one can do the job, but get 2 and it's easier, and more and the next thing you know, your horse can go longer and faster because it dosent have to work as hard, so ya they can get the job done but if you have a big heavy boat stick with the tried and true V8.
Myles nailed it.... but do tell:what boat and drive do you wish to repower with the ROTAX?
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This was a great question as I have often wondered why some of the outboard power-heads couldn't be used as I/O power being smaller and and more compact under the motor box ? OMC used to use their V4 against their stern drive many years ago, it was a very compact setup and as I remember did the job quite well. With the new fuel injected engines of today both 2 cycle and 4 it would seem they could do the job much better in so many ways i.e. size and weight, fuel economy and performance ! Your thoughts Kevin ?