What shaft length outboard? 2 tubes and strakes?

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ROBBSRACINGENGINES
Posts: 73
Joined: Sun Aug 28, 2011 9:40 am
Location: New Hampshire

What shaft length outboard? 2 tubes and strakes?

#1 Post by ROBBSRACINGENGINES » Sat Aug 02, 2014 5:33 am

I have a 2 tube 24' Aqua Patio. 25" tubes with NO strakes. Rite this minute it has a Yami 50Hp outboard on it with a 20" shaft. I have sold the motor and will be replacing it with a 150hp. I also will be installing lifting strakes at roughly the same time. My question is do I want a 25" shaft motor now because of the strakes? It would seem that with the strakes the motor will be much higher in the water at speed. Any thoughts? Are there any straked 2 tube owners that can chime in here? Tri- toons are 25 inch motors correct? Im sure transom design plays a big role in this but for the most part they are 25"?
1986 Suntracker Party Barge-2000 130hp. Yamaha Deck off Resto SOLD
2001 Godfrey AquaPatio 240LE- 2006 150hp. Yamaha 4 stroke Deck off Resto. A work in progress!

http://www.robbsracingengines.com

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litgrep
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Joined: Fri Jun 13, 2014 3:12 pm
Location: mid-Michigan

Re: What shaft length outboard? 2 tubes and strakes?

#2 Post by litgrep » Sat Aug 02, 2014 3:37 pm

My expirience, although on v-hulls is that cavitation plate should be 1 to 2 inches below transom base. Strakes won't lift that. 25 inches is a lot below water and will tent to dig prow down - don't want. If not changing transom mount stick with 20 inches. Imo

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ROBBSRACINGENGINES
Posts: 73
Joined: Sun Aug 28, 2011 9:40 am
Location: New Hampshire

Re: What shaft length outboard? 2 tubes and strakes?

#3 Post by ROBBSRACINGENGINES » Mon Aug 04, 2014 5:18 am

Anyone else?
1986 Suntracker Party Barge-2000 130hp. Yamaha Deck off Resto SOLD
2001 Godfrey AquaPatio 240LE- 2006 150hp. Yamaha 4 stroke Deck off Resto. A work in progress!

http://www.robbsracingengines.com

NH Tooner
Posts: 212
Joined: Sun Dec 18, 2011 11:13 am

Re: What shaft length outboard? 2 tubes and strakes?

#4 Post by NH Tooner » Mon Aug 04, 2014 5:30 am

Hey Rob.
I have a tritoon with a 25" motor. I also have a jack plate which is all the way up. I could probably put a 20 on mine no problem. Come by and take measurements if you want
Dave
Dave

2012 Homebuilt 28' Tritoon
225 hp Mercury

1993 24' Forester
50 hp mercury

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