[Gary Black]

Hello Guys,

Are there any straight forward upgrades to increase the power of a standard Mercruiser 3 litre? I have a new prop to install for the start of the season but was wondering if anyone can advise me on easy power gains (apart from the obvious, buying a bigger boat).

Thansk very much,

Gary

[mikeyt]

Originally Posted by Gary Black

Hello Guys,

Are there any straight forward upgrades to increase the power of a standard Mercruiser 3 litre? I have a new prop to install for the start of the season but was wondering if anyone can advise me on easy power gains (apart from the obvious, buying a bigger boat).

Thansk very much,

Gary

There's not a lot you can do to a 3 litre to provide a 'significant' power increase without going to considerable expense and reducing your reliability. Keeping it tuned and correctly propped, keeping the hull clean and reducing any excess weight in the boat is about the best you can do........ but i would consider swapping your motor for a 4.3 litre. Should be a straight swap and the Alpha one should bolt right on. That will take you from the mid - high 30mph range up to closer to 50mph and provide much more grunt.

[nglauer]

I was curious, found this old post and you mention that the 4.3L should be a direct swap? I was just curious if a swap would ever be possible on my 2001 Diablo 180. I don't plan on doing anything like this for a long time... but 4-5 years from now I may be interested in doing such a swap. My plan is to hold onto our boat and just upgrade it over time. I'd like to make the interior a little nicer one day (it's mint now... but could be more upscale with some professional help), although I have to admit that for a base model it looks a heck of alot better than some current models out there.

[Sparky]

LOL ,,,,get a bigger motor