Re: Help Bigshrimpin! 14 3/4 x 17 viper prop
 

I get about 47 mph at 5600.

Re: Help Bigshrimpin! 14 3/4 x 17 viper prop
 

That`s pretty impressive.

Are there any used ,er pre-owned powertechs around? If not ,think I`ll try a mirage plus.

Thanks again,
GFS
p.s.
How does diameter affect dynamics ?

Re: Help Bigshrimpin! 14 3/4 x 17 viper prop
 

There was one on ebay a couple of days ago. Yamaha, which is the same spline system as Merc. You'd have to rehub, which is about $60.

17P Powertech

Re: Help Bigshrimpin! 14 3/4 x 17 viper prop
 

Thank you Father.
See you in church!

Thx,
GFS

Re: Help Bigshrimpin! 14 3/4 x 17 viper prop
 

Only if you come out here!. I was born in WPB, but haven't lived there in 20 years.

Re: Help Bigshrimpin! 14 3/4 x 17 viper prop
 

Fr. Frank,
Were you running the Cleaver surfacing or submerged? I've read that cleavers should be run about half out of the water, otherwise the thick trailing edge makes them very inefficient. But running them high screws the acceleration because they can't bite as well. So, is that why you got higher RPMs, higher top end, but poor acceleration?

I've got a 21 Cleaver laying around. After reading your post, I thought I might try it on my 20SF/200Merc just to see what it does.
Thanks,
Dave

Re: Help Bigshrimpin! 14 3/4 x 17 viper prop
 

Hey Father,
Found a mirage + on weeway. 15 1/2 x 17 no nicks or divots. Merc`s prop selector recommends 15.38 x 18 or 15.38 x 17 for more top end. I`m looking to gain 4-500 rpm. Please see me in the confessional.

Re: Help Bigshrimpin! 14 3/4 x 17 viper prop
 

Surfacing. Had the motor on the highest mounting hole, trimmed out. Threw a 30' high rooster tail. But you began to wonder if it was ever going to get on plane. :D

Re: Help Bigshrimpin! 14 3/4 x 17 viper prop
 

Yep. That's what I figured. I'd probably need a Bob's Nosecone and a jack plate to get any benefit out of a cleaver.

Re: Help Bigshrimpin! 14 3/4 x 17 viper prop
 

I had a nosecone, but no jackplate.