Re: prop survey
 

yosh...contact these guys and tell 'em what you got and what's goin' on w/ it...they'll fix ya up! ;)

http://www.ptprop.com/

Re: prop survey
 

reelapeelin: I hooked up my merc tach yesterday and ran the 3 blade aluminum 15.5 by 17 and it was a real eye opener. Red line is 5,600 for the Merc 150. I ran it up to a little over 5,400 and the GPS speed was right at 41 MPH solid with a half tank of gas , trimmed up and just me. I am now using the 4 blade comprop as a spare. I think I am going to leave well enough alone...Many thanks for your prop advice , Frank

Re: prop survey
 

sfprovyn, GLAD to hear it worked out for ya!! ;D ...that size prop seems to be turnin' in best numbers for these V 20s w/ 150s... 8)...

Re: prop survey
 

I've got a 260hp Volvo I/O 280T with a Michigan 15x19 3 blade aluminum prop. *I feel my numbers could really be improved with a better prop, but I'm having trouble getting numbers for it. *I don't even know what my WOT rpm is. *The highest I've ever taken it was 4000 rpm, the book states 4400 for WOT, but it seems like I have a lot more to give it. *The trouble is, I hardly ever get any flat water here and the boat is coming completely out of the water by 4000. *My cruise is only 28 mph at 3200 rpm and 2500 rpm only gets me 12 mph. *I would like something that holds on to the water a little better at 2500 and would help pick up my cruise some. *I could care less about the top end, I've got no use for that. *I was looking at a 14 3/8ths x 19 4 blade stainless. *There may be a 330-350 hp engine in this boat's future as well (fuel efficiency reasons). *Don't worry about overpowering the hull, the motor will be derated from a 5500 rpm redline to 4500 which should keep me within the 310 horsepower rating for my hull. These numbers are with full gas, gear, and 2 POB.

Re: prop survey
 

18.5 dia
aluminum
5500 rpm 42 mph

i have a new rebuilt chevy 305 with a 2 barrel.......saves gas!

volvo penta 280 outdrive

Re: prop survey
 

sfprovyn - Keep your eyes peeled on ebay for

17 Merc Mirage Plus
17 or 19 Mercury Offshore (Vensura)
19 Mercury Laser2
17 or 19 Mercury Tempest

The Mirage, Offshore and Laser 2 pop up on ebay - now and again for under $200. You'll pick up an extra 2-4 mph . . . just by changing to a thinner blade stainless. These are all good designs above.

Re: prop survey
 

BS, I'm running a 14x19 Vengeance. Is that a low end SS prop?

Re: prop survey
 

Tin - Vengeance is a good prop, but it's not as fast as the Offshore, Laser or Tempest Plus.

Re: prop survey
 

http://cgi.ebay.com/ebaymotors/Mercu...QQcmdZViewItem

This would be good for someone with a 150hp Merc or Yamaha.

Re: prop survey
 

After hangin' on the Honda, I tried a Merc Mirage 15 1/2 x 17...GREAT performance, but a little too heavy and caused a rattle in the gear-case...would probably turn in good numbers on the 150 Merc on a V-20... ;)...