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Repower26 Venture w/ twin 90 Suzuki

 
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cwthayer



Joined: 17 Dec 2004
Posts: 14
City/Region: Anchorage
State or Province: AK
C-Dory Year: 2007
C-Dory Model: 26 Venture
Vessel Name: Miz Josie
Photos: Miss Josie
PostPosted: Tue Mar 13, 2018 1:49 am    Post subject: Repower26 Venture w/ twin 90 Suzuki Reply with quote

I am repowering my 26 Venture w/ twin 90 Suzuki from Twin 90 Tohatsu TDLI next month. Any suggestions on prop size and pitch? Performance estimates?
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26 Cape Cruiser/Venture 2014-
30 Norstar--2004-2014
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jennykatz



Joined: 15 Dec 2003
Posts: 1504
City/Region: naples
State or Province: FL
C-Dory Year: 2006
C-Dory Model: 23 Venture
Vessel Name: Jennykatz
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PostPosted: Tue Mar 13, 2018 7:50 am    Post subject: Repower Reply with quote

Why how were the Tohatsu s
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Duck c-22 cruiser sold 6/23/08
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00 cd16 cruiser honda 40 sold 3/12
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little wing



Joined: 21 Sep 2016
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City/Region: Oakland
State or Province: MI
C-Dory Year: 2005
C-Dory Model: 22 Cruiser
Vessel Name: Toots
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PostPosted: Tue Mar 13, 2018 4:20 pm    Post subject: Reply with quote

Me also. What was wrong?
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tsturm



Joined: 01 Nov 2003
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City/Region: Soldotna
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C-Dory Year: 2003
C-Dory Model: 25 Cruiser
Vessel Name: JMR TOO
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PostPosted: Wed Mar 14, 2018 10:34 am    Post subject: Re: Repower26 Venture w/ twin 90 Suzuki Reply with quote

cwthayer wrote:
I am repowering my 26 Venture w/ twin 90 Suzuki from Twin 90 Tohatsu TDLI next month. Any suggestions on prop size and pitch? Performance estimates?


I would start with the same pitch & dia. as you have now.
After the break-in period see what your Wide, Open, Throttle RPM is. Change props as nec. to make WOT (in owners manual) with a loaded boat. My dealer let me experiment with props as long as no damage, I could return/exchange.
On my 175 Suz. 6200rpm is wot.

You will like the Suzuki's.

Have fun. Beer Mr. Green
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Sea Wolf



Joined: 01 Nov 2003
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City/Region: Redding
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C-Dory Year: 1987
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PostPosted: Wed Mar 14, 2018 11:02 am    Post subject: Reply with quote

One more consideration:

Before you select a prop to start out with, consider both the final drive ratio.

Final drive ratio the same? If so, no change, but, for example, if going from 1.5:1 to 1.75:1 (a 14% difference, then add 14% to the pitch. e.g., 13" pitch original, to 14.8", or 15".

Joe. Teeth Thumbs Up

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"Most of my money I spent on boats and women. The rest I squandered'. " -Annonymous
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thataway



Joined: 02 Nov 2003
Posts: 16105
City/Region: Pensacola
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PostPosted: Wed Mar 14, 2018 6:02 pm    Post subject: Reply with quote

Both engines are probably going to be swinging a 14" diameter prop. The Final gear ratio in the Suzuki is 2.59/1 and the Tohatsu is 2.33/1. The Suzuki is only about 11% lower...and that is not going to give you a full 2" increase in pitch. I would start with the same pitch you had, and perhaps go up 1"....The difference between the various 90's is no where as dramatic as the 150's or 175's in final gear ratio.

I am also interested in why the switch, unless the engines are shot.

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Thataway
Thataway (Ex Seaweed) 2007 25 C Dory May 2018
Thisaway 2006 22' CDory November 2011 to May 2018
Caracal 18 140 Suzuki 2007 to present
Thataway TomCat 255 150 Suzukis June 2006 thru August 2011
C Pelican; 1992, 22 Cruiser, 2002 thru 2006
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Home port: Pensacola FL
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cwthayer



Joined: 17 Dec 2004
Posts: 14
City/Region: Anchorage
State or Province: AK
C-Dory Year: 2007
C-Dory Model: 26 Venture
Vessel Name: Miz Josie
Photos: Miss Josie
PostPosted: Fri Mar 16, 2018 2:36 am    Post subject: Reply with quote

The Tohatsu have been great engines----However, they are 2006 models and are starting to have issues. I would rather repower in the spring then have issues during the summer. The most important reason----the admiral suggested the repower.

I appreciate the thoughts about the props. I am interested in seeing the different performance in the boat.
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jennykatz



Joined: 15 Dec 2003
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City/Region: naples
State or Province: FL
C-Dory Year: 2006
C-Dory Model: 23 Venture
Vessel Name: Jennykatz
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PostPosted: Fri Mar 16, 2018 7:40 am    Post subject: new eng . Reply with quote

We did that in 2016 we sold our Yamaha 115 and bought the merc 115 CT .There were a few reasons

1-eng was 11 years old in salt water had 1100 hours
2- resale was still very good got $3500 for her
3-We keep hearing that new engines will have to have catalytic converters on them (just like the I/O s have for 2017
4- we had some trim issues that could become problematic and costly
5-the person buying the engine would not be trimming eng up and down it would go on a barge and stay in one position .

If I had a boat I liked and had older moters and could afford the repower now is a good time to do it .Jim (little treasure ) jennykatz
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TyBoo



Joined: 23 Oct 2003
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PostPosted: Fri Mar 16, 2018 10:24 am    Post subject: Reply with quote

I don't have anything to offer on the prop selection but it looks like you have some good advice from a few others.

I agree with the repower sooner than the hour meter suggests. I had to do it last year in the middle of salmon season because I waited a year too long.

My old Honda had about 1600 hours when it gave up and I had expected another year or two out of it. The dealer didn't want it in trade but said he'd give me a couple hundred for it for parts. It wasn't worth hauling up there for that so I stuck it on Craigslist for $1000 and just before I was going to give up and donate it to the local college auto shop I got an offer of $800 from a mechanic who figured he could fix it. I told him the problems with finding parts for that particular motor and sort of tried to talk him out of buying it but when he drove off we were both happy.

The point is, if I had done the repower a year earlier I would have caught more fish and maybe made more on the resale of the Honda.

You will like the Suzukis.

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1996 25' Cruise Ship
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Robert H. Wilkinson



Joined: 26 Jan 2011
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PostPosted: Sun Mar 25, 2018 9:42 am    Post subject: Reply with quote

Our newest member Braveheart equipped their new RF246 with twin Suzuki 90's. Going to give them a good workout this summer doing the great loop.

Regards,

Rob

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forrest



Joined: 02 Nov 2003
Posts: 304
City/Region: Chehalis
State or Province: WA
C-Dory Year: 2007
C-Dory Model: 26 Venture
Vessel Name: Long Story
Photos: Long Story
PostPosted: Sun Mar 25, 2018 12:01 pm    Post subject: Reply with quote

I have heard that all the Japanese motors have corrosion problems but the Etecs don't. Don't know if that is true or not.
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jennykatz



Joined: 15 Dec 2003
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City/Region: naples
State or Province: FL
C-Dory Year: 2006
C-Dory Model: 23 Venture
Vessel Name: Jennykatz
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PostPosted: Mon Mar 26, 2018 9:01 am    Post subject: corrosion Reply with quote

Mercury and Yamaha seem to have the best metals and best protection . Honda's and Suzuki's seem to have more corrosion problems down here in SW Florida .Yamaha and Mercury had a mutual agreement up until 2005 or so where merc got 4 stroke eng from Yamaha and Yamaha got the paint and metal process

We see many different engines at the vo-tec school in Collier county .
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Larry H



Joined: 01 Nov 2003
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C-Dory Year: 1991
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PostPosted: Mon Mar 26, 2018 7:00 pm    Post subject: Reply with quote

Many years back, Evinrude researched corrosion in outboard legs and lower units. They found that any copper at all in the aluminum will cause corrosion in salt water. For that reason, they sampled each batch of molten aluminum that arrived at their casting plant, and rejected any shipments that did not comply. Because of this quality control Evinrude/Johnson outboards did not have excessive corrosion problems.

This research and quality control put Evinrude ahead of the Japanese motors for years and might still today.

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Larry H

A C-Brat since Nov 1, 2003
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