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25p prop on a senator

F

fastride

New member
I found a stainless prop for my 1990 senator for a good price, It is a 25p 4 blade stainless omc shooter. My trouble is I am not sure my boat can run that much pitch. I have a omc w/ford 351 260hp 20' boat. I normally run a 21 3 blade aluminum but mainly run on shallow inland lakes I thought this would be good for bigger water like st clare. With the 21 I run about 55 but stop gaining speed at 3/4 throttle. Any thoughts or advice would be great thanks.
 
im gonna guess its to much, ive spun a 25 & 26 (3 blade) on my senator but its a few more horsepower than stock... and it still kinda planed slower than i like.

i would recommend a 21-23" for yours. (3-blade)
or like a 21" in a 4 blade

i personally like the 3 blade props... my $0.02
 
Thats exactly what I`ve found with my `88 Senator, what Mr Buss says. I was running a 454 with a mild cam and Imco headers and with a 23" 3 blade prop repitched to a 25 with extra cup in it I could get 69 to 70 out of it, but it would hit the rev limiter in good air. I also run an XZ drive with a 2" Imco shorty on it. The best thing to do is try everything you can borrow or steal to find out what your combination really likes, all motors are different. Keep an eye on your spark plugs, if they are black you are giving up power. Also watch your tach, you too may be on your rev chip!
 
Oh, I also agree with the 3 blade prop sugestion. There is 33% more drag spinning that extra blade through the water, on a bigger boat with more hull drag it is worth it to reduce slip, but my Senator didnt like the extra blade either.
 
Thank you MR. Buss,and Moisturemissile for the advice you may have saved me $125. I went with a new hustler 21 aluminum from dans props they said that this model is cast the same as the stainless for better performance they also added that the mich wheel model I currently own is not a very good prop. hopefully I notice a difference but I still would like to try a 23.
 
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