Maximum inboard prop diameter
 

Anyone know for sure?
I know they "growl" a little but want to maximize efficiency.

:confused:

I ran a 16" on my old 23. I think the stock one was 16 x16. I don't think you could run a 17" wheel as its to close to the tunnel and would cause cavitation and a bit of noise. The CC26's run a 17" but the tunnel is much bigger or wider and the shaft angle is slightly different. The 26's also had a cavitation issue with some noise also did not like to turn to port at speed.

I managed to get the prop from the previous owner, 17 x 17 3 blade. I now have a starting point.
So. I am really close to the engine decision. I believe it will be the PCM 409hp beast.
Prerequisites were, fast and clean. I really like the cooling system on the PCM. KISS theory!
I want to be able to "loaf" along at about 25 knots without a horrendous fuel burn, but have a little sumtin under the hood for when one of those pesky outboard fellas pull alongside.
Did i mention fast?

i run a 17x15 with some cup on mine and it does very well, plenty of clearance to hull.

If you dont mind me asking, would you share your gear ratio, HP of motor and cruise/WOT numbers please?

power will have to be increased exponentionally to gain speed...


there's no way a 23 inboard will run with the go fast outboards,such as the contenders,yellowfins and jupiters - ain't gonna happen...

smart move:

repower with a new merc 5.7 horizon,use a 1.5:1 zf gear and be done with it

it's gonna prove to be reliable and incredibly fuel efficient

the boat will run a real good speed with that power - and the best part:

it's an easy install/set up


if you want to run with the fast outboard rigs - get one

trying to make that inboard run with them is going to be like finding bigfoot - a dream...

I'm not sure about running with the new go fasts. I want to see a solid 40. Fast for an inboard.
I will routinely carry 5-6 people and a large cooler of water/beer!
The Sea Craft 23 inboard was fairly popular here. For a small island, I can count 4 without thinking about it much. I know 2 for sure have inboard Volvo Diesel and are pretty tired.
None are restored.
I'm trying to be a little different. My nature!

I ran a 17-17 for a while on mine but the old 260 hp was just not enough to spin it in the proper rpm range. Also tried a 4 blade 16 i believe and that was a waste of a grand too! Lol. Worked my way back to i think im turning a 16-15 now and that worked great with the old motor. Going with a new vortec this time so i will see how it does with an extra 50 ponys.

Ive got a fuel injected marine power 350 with 315hp and a 1.5-1 zf gear, cruise anywhere from 20 to 27mph depending on seas, seas here on the cape are generally crappy and the boat will cavitate a lot if you don't bump it down. if you want to run 40 go with the outboards

That cruise sounds great. What wheel are you running?