Prop suggestions new 351w

EJ OJPROP who works for OJ said "We supplied Brendella with 14 X 16's as original equipment with that ratio. I would offer a 13.7 X 15.5 XMP for that set up"

Do you think the 4 blade 13.5x14.25 is a poor choice? I should have it Friday. I ordered a prop pulling kit and the 1793 Monday. I ordered it new from acme so I can return and exchange till I get the one I like. Can you explain the logic between the 3-4 blade prop choice. I understand how size and pitch affect I don't understand how the extra blade affects everything?

TRBenj wrote: [QUOTE=svxwilson]The correctcraft forum doesn't have nearly the amount of helpful people either. I have tried both.

Well thats certainly not going to make you many friends here.



I was frustrated i apologize. I will repost on that mastercraft forum my apology Was not trying to piss anyone off I posted here and people basically told me to find another forum. Got no help. I know I have a low production boat. I have had a hard time finding info on it. But thank YOU for your reply. Yes I have a reverse motor with a 1.23/1pcm and a left hand prop. I do not know enough about Ski Brendella to tell you if that was the original config or not. But it's what I am working with.

US MARINE ENGINES
www.usmarineengine.com

Is where I got the long block from. They explained the extra HP came from the cam and higher compression. Please forgive my engine ignorance. I can turn a wrench and replace parts but by no means am I a mechanic.
From their webpage
"High quality components that equal high quality rebuilt marine engines. All of our marine engines come with new rings, new springs, new pistons, new valves, new push rods, new timing set, new rockers, new brass freeze plugs, new push rods, new bearings, and new lifters. Head castings, crankshafts, camshafts, and rods are all machined back to marine engine specifications and blocks are bored oversize."

I reused the holly carb and intake from old engine. The engine builders had to search for the reverse parts because they are harder to find.

I talked with Greg at ACME and he recommended a 4 blade 13.5x14.25 model 1793. So I ordered that, he was convincing about their customer service that they would exchange until I found the prop that works best with my boat.

I know 50mph is something I won't get to. But close is what I am aiming for. I do mostly slalom skiing and cruising up and down a very large lake. So lower rpm at higher speed is the desired result.

I have never been pulled out of the water as fast as it can do right now with the current prop ACME 543. But 4000rpm was 31-32 mph. I never took it to wot with that prop and current engine only had it out once after install so I was breaking it in and I wasn't sure if wot would be a good idea first break in trip out. The engine builders said the desired rpm was 4200 and not to exceed 4600.

Once again thank you for your help. I will happily listen to anything you have to say or recommend. If there is a better forum for my peticular brand boat then let me know.

Billings area. Wish I was in the flathead area.

What ratio is the tranny on the Ski Nautiques?

I don't imagine a lot of guys have info on hull performance numbers on this site for that boat. Just as a reference most 240 HP 351W engines in 1982-1988 Ski Nautique 2001's (2400 dry weight) run between 4400 and 4600 RPM with an Acme 540. With an Acme 542 (equivalent opposite rotation to the 543) these boats would run between 4600 and 4800 rpms.