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propeller help needed: 150HP Evinrude 1993
"mark" wrote in message ... I have a 225 ficht on a 26' v bottom aluminum workboat and at 6000rpm the 3 blade only gave me around 35mph and the 4 blade again at 6000 gave me 42 mph, I was amazed because I thought the 3 blade would give a higher top speed. Were they the same pitch and diameter? "bleezle" wrote in message oups.com... All, I have recently purchased a 1993 Stratos 274 DC bass boat, 17.5' long. It came with what I was told was a stock motor -- 150 HP Evinrude. The seller had changed the prop to a spare he had -- 25 pitch, 13.5", 4 blade propeller. The boat now has a hole shot that takes a long time, bow wayyyyyy up until you nurse back power a bit to bring it on plane. It generates 4400 rpms and reaches about 50 mph via gps (MFG range is 4500-5500 RPM at WOT). It has a jackplate and I've raised it from about 6 inches to about 4 currently. Does anyone know what the original prop would be? If not, does anyone have any advice about what I should try next? What I've read online suggests this: *get RPM's up first -- and that reducing pitch by 1" = 200 RPM's on average. So I'm thinking dropping pitch by 3-4" is the right place to be, or in my case either a 21 or 22" prop. *blades -- 3 or 4?? I have no idea what the difference might be. *diameter: I have no idea. Thanks much!! Please reply to |
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