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3 blade prop to 4 blade

G

gogolfted

New member
i have a mercurser v8 228 hp w

i have a mercurser v8 228 hp with a 1.50 sterndrive on it.i have a rampage 3 blade on it now and want to go to a 4 blade for better slow speed control.what would be a good pitch?my rampage prop is a 14.25 X 15 but i have very little clearance from the prop to the upper sterndrive.had to go to a flat zink.any ideas?
 
"Ayuh,......

I'd think

"Ayuh,......

I'd think you'll want to get as close as possible to a 15" Pitch as you can.......

Don't worry about the Diameter,....."
 
"ted;
Here is a spreadsheet I

"ted;
Here is a spreadsheet I made up that you can use to estimate your top speed and what pitch prop will work best.

Rod

<center><table border=1><tr><td>http://www.marineengine.com/discus/icons/mime_msexcel.gif""" align=left alt=""application/vnd.ms-excel"">Boat Speed Finder
[url=""][b]Boat Speed Finder.xls[/b][/url] (20.0 k)</td></tr></table></center>"
 
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