ronan1776 wrote:
my boat has a 13-1/4 x 17 on her now which can turn at about 4900rpm(4200-4600wot recom) but would like to improve hot shot,mid range and fuel economy. been looking at 4 blades but getting lost in the mumbo gumbo.....help please
Based on what you have said, you are slightly "under-propped", as indicated by exceeding recommended WOT RPM. My suggestion is to go to a 19P SS (3 blade), with a slightly larger diameter, if possible. This should bring you down about 200 RPM at WOT. This will probably not change your hole-shot, but keep you from over-revving the engine. I would spend the time to dial in the correct 3 blade combo for your style, then step to 4 or 5 blade configuration.
First, do a search... we have beat the subject to death on 3, 4 and 5 blade props.
I've run 3, 4 and 5's. I'm a big fan of the Hi5. My 21P 5 blade gives me the same top end speed, RPM, and cruise as the 19P 3 blade, but with much better acceleration, and improved handling/less cavitation in tight turns.
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Walt B
"Debt-Charged"Black '07 H210SS6.2L Bravo One turning a 21P HIFive
Wakeboard Tower with Perfect Pass Stargazer version
Missouri River; Kansas City, Mo.