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2001 boston whaler conquest 28 repower
conquest1977	#1  Posted on 03/08/14 - 3:10 PM
Member Posts: 4 Comments: 0 Joined: 09/03/12	Hello all, I have a 2001 boston whaler conquest 28 with twin Yamaha 250 EFI ox66 2 stroke engines. I am repowering with twin 2005 mercury verado 250. The boat is 30'8" LOA, 10'4" beam, and 8400 pound dry weight without engines. Looking for some info on what props to run. (brand, diameter, and pitch) Looking for a combination of top speed and fuel efficiency. Also any other info on this repower. Kris
aeriksen	#2  Posted on 03/08/14 - 4:41 PM
Member Posts: 242 Comments: 0 Joined: 07/24/12	Tom Clark is the guy that I found really understands props. If he doesn't chime in I would suggest sending him a personal message. I hope this doesn't upset anyone. If it does mia copa, mia copa.
Joe Kriz	#3  Posted on 03/08/14 - 4:47 PM
Site Owner Personal Page Personal Album Photo Albums Project Albums Posts: 11447 Comments: 452 Joined: 03/18/05	Yes, it is much better to share information here so others in the future can benefit. Members send me email frequently asking me questions but I refer them back to this site to ask questions for the same reason I gave above. I believe the other moderators feel the same way and refer members back to this site to ask questions. Otherwise we should just shut our doors and let people try and find the information somewhere else on the net. Edited by Joe Kriz on 03/08/14 - 4:50 PM
Tom W Clark	#4  Posted on 03/08/14 - 6:22 PM
Member Personal Page Posts: 4280 Comments: 7 Joined: 09/30/05	Try a pair of 14-5/8" x 17" Revolution4s or 14-1/4" x 18" Enertias. If cruise speed fuel economy is your primary goal, try a pair of 15-1/2" x 17" MIRAGEpluss or see if you can order a set of the new Enertia ECOs (though I do not believe they are on the market yet).
conquest1977	#5  Posted on 03/09/14 - 6:49 AM
Member Posts: 4 Comments: 0 Joined: 09/03/12	Thanks for the reply. Though new Ecos are only available in 19" pitch and above.
Tom W Clark	#6  Posted on 03/09/14 - 8:49 AM
Member Personal Page Posts: 4280 Comments: 7 Joined: 09/30/05	19" will be too much pitch.
conquest1977	#7  Posted on 03/09/14 - 1:27 PM
Member Posts: 4 Comments: 0 Joined: 09/03/12	Mercury states that their only propeller that you get the best of both worlds (top end speed and hole shot) is the enertia Is that true.
Tom W Clark	#8  Posted on 03/09/14 - 2:07 PM
Member Personal Page Posts: 4280 Comments: 7 Joined: 09/30/05	No.
conquest1977	#9  Posted on 03/09/14 - 4:13 PM
Member Posts: 4 Comments: 0 Joined: 09/03/12	Try a pair of 14-5/8" x 17" Revolution4s or 14-1/4" x 18" Enertias. Tom, how come you recommend a 17" for revolution4s and an 18" Enertia. Why the 2 different pitches. Does it have to do with the different designs of the props. Also, what does a larger or smaller diameter affect. Thanks Kris Edited by Joe Kriz on 03/09/14 - 6:11 PM
Tom W Clark	#10  Posted on 03/09/14 - 6:09 PM
Member Personal Page Posts: 4280 Comments: 7 Joined: 09/30/05	The Rev 4s will yield about 7 percent calculated propeller slip, the Enertias will yield about 10 percent slip. The Enertias will also have a slightly higher top speed.
Tom W Clark	#11  Posted on 03/09/14 - 6:23 PM
Member Personal Page Posts: 4280 Comments: 7 Joined: 09/30/05	Don't concern yourself with the diameter; the Revolution 4 and Enertia are completely different propellers with different blade geometry.