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prop/speed on 86 revenge-175 johnson
hrnhunter	#1  Posted on 07/03/09 - 3:55 PM
Member Personal Page Posts: 5 Comments: 0 Joined: 06/25/09	I'm getting about 30 mph right now with unknown aluminum prop. I was considering going to a ss, any suggestions on size and pitch? What kind of speed can I expect? Thanks
Derwd24	#2  Posted on 07/03/09 - 4:04 PM
Member Posts: 1607 Comments: 9 Joined: 05/09/07	Take a look on the prop hub, in the round spot right behind the prop nut, sometimes the dia and pitch are shown there. Do you have a tach? Dave - 1983 Outrage 22
Phil T	#3  Posted on 07/03/09 - 4:19 PM
Administrator Personal Page Personal Album Project Albums Posts: 7043 Comments: 6 Joined: 03/26/05	As Dave said, we will need more information: 1986 Revenge ...(What length?) Propeller brand and size (diameter x pitch) Tach RPM's at WOT Speed measured by GPS Load (fuel, gear, passengers) Water and wind conditions at the time observations were taken Engine height All these answers will help us get you dialed in.
hrnhunter	#4  Posted on 07/03/09 - 9:07 PM
Member Personal Page Posts: 5 Comments: 0 Joined: 06/25/09	22 foot revenge- outrage hull with a cuddy. I found a 15x17 on the hub plus a serial number, but no brand. I hit the thirty mark by gps under optimum conditions, no wind, light load,35 gallons of fuel, two men and a 60 pound bluetick coonhound, with the tach running about 48-4900. If I'm pushing a slight head wind it's more like 27 or 28. also the gps measures sm/h, not sure what the s stands for? not sure what to measure for engine height?
Joe Kriz	#5  Posted on 07/03/09 - 9:13 PM
Site Owner Personal Page Personal Album Photo Albums Project Albums Posts: 11447 Comments: 452 Joined: 03/18/05	I owned a 1989 22' Outrage Cuddy. About the same weight of your Revenge. I had a 1999 Evinrude 175 hp on it and the boat would do 40 mph... The prop was a 14 1/ 2 x 17 Pitch - Renegade Offshore 4 Blade Prop I am not saying this prop is the right one for your motor as we don't know the year of your motor. As far as mounting height. It is measured by which hole the mounting bolts are installed in the engine bracket. Mine was mounted in the second set of bolt holes from the top which is called the second hole up... All boat can vary slightly due to many other reasons.. Therefore, each boat needs to be setup individually for optimum performance. Edited by Joe Kriz on 07/03/09 - 9:18 PM
hrnhunter	#6  Posted on 07/03/09 - 9:45 PM
Member Personal Page Posts: 5 Comments: 0 Joined: 06/25/09	I also have a 28 horse johnson kicker motor on it and I think both motors are original, "86, It seems like I read that somewere but I can't find it right now. The main motor is mounted in the top hole. I'd love to get 40 out of her but maybe this old motor is too tired to do it. any suggestions on what I might try?
Joe Kriz	#7  Posted on 07/03/09 - 10:04 PM
Site Owner Personal Page Personal Album Photo Albums Project Albums Posts: 11447 Comments: 452 Joined: 03/18/05	Your motor is definitely mounted too low. I would start by raising it up one hole to begin with. You might even end up going up two holes with the motor. Other members here can probably recommend a prop for you.
hrnhunter	#8  Posted on 07/03/09 - 10:11 PM
Member Personal Page Posts: 5 Comments: 0 Joined: 06/25/09	Thanks Joe, I'll try that. What can I expect if I go too far or not far enough?
Derwd24	#9  Posted on 07/03/09 - 10:22 PM
Member Posts: 1607 Comments: 9 Joined: 05/09/07	Give this a read, it should help explain the overall process: http://www.veradoclub.com/smf/index.p...opic=137.0 Dave - 1983 Outrage 22
RevengeFamily	#10  Posted on 07/04/09 - 4:06 AM
Member Personal Page Posts: 192 Comments: 2 Joined: 06/21/08	hrnhunter wrote: with the tach running about 48-4900. If I'm pushing a slight head wind it's more like 27 or 28. also the gps measures sm/h, not sure what the s stands for? I believe at WOT that engine should be turning between 5- 5500 rpm. Your GPS gives you the option for speed readings in either SM/H (statute miles) or NM/H (nautical miles).
Eri	#11  Posted on 07/10/09 - 10:12 AM
Member Personal Page Posts: 157 Comments: 4 Joined: 10/09/08	Just an FYI. After consultation with a well known Johnson/Evinrude dealer, at least for the 18 Outrage/Newport models, he recommended the cavitation plate up to one inch above keel.
hrnhunter	#12  Posted on 07/11/09 - 10:08 PM
Member Personal Page Posts: 5 Comments: 0 Joined: 06/25/09	Thanks, I moved my motor up two holes, putting me at the third hole up with 1/2 inch above keel and gained 2 mph, I think I'll try one more, putting me around 1 and 1/4 inch above keel. I was thinking about going to a 15x15 prop, I appreciate any advise anyone might have for me on this.