mercruiser alpha gearing for 23 tsunami

[1bayouboy]

And which prop are you running......just changing your prop could get you to WOT. I gave up some top end and a little efficiency to get my merc/bravo to the right WOT range....which crazily of you ask me....on the 350 MAG MPI Horizon is rated to 5200RPMs!!

[hedgehog]

Thanks for the input....I was trying to do the math in my head and was assuming, maybe incorrectly, that the 1.65 ratio would give me a little more low end which is much needed for the weight of the boat.

I am running a 15x17 alum prop which seems to perform well...just keeps me a few hundred rpm shy of max wot. I am more interested in overall performance rather than speed so looks like I will stay with the same dia/pitch this season.

Thank you both for your reassurance and input

[1bayouboy]

The 1.65 is engine rev to 1 prop rev. So the lower the ratio the less prop pitch you can usually turn. Bravo 3 drive with 22 pitch props are more like 2 or 2.2.