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Honestly how many ponies do you prefer on a 25'
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bshillam



Joined: 21 Aug 2007
Posts: 782
City/Region: Bellingham
State or Province: WA
C-Dory Year: 1981
Vessel Name: Heaven To Me
Photos: My Heaven
PostPosted: Mon May 25, 2015 10:13 pm    Post subject: Honestly how many ponies do you prefer on a 25' Reply with quote

I have seen 135-200 on the CD 25. I have also read a few post on this site about HP ratings and motors on the 25. I'd like to hear first hand, what HP rating do you have and would you prefer something different? Also what kind of economy you receive from your outboard set up? Thanks much!
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tsturm



Joined: 01 Nov 2003
Posts: 1134
City/Region: Soldotna
State or Province: AK
C-Dory Year: 2003
C-Dory Model: 25 Cruiser
Vessel Name: JMR TOO
Photos: JMR-TOO
PostPosted: Mon May 25, 2015 10:59 pm    Post subject: Re: Honestly how many ponies do you prefer on a 25' Reply with quote

bshillam wrote:
I have seen 135-200 on the CD 25. I have also read a few post on this site about HP ratings and motors on the 25. I'd like to hear first hand, what HP rating do you have and would you prefer something different? Also what kind of economy you receive from your outboard set up? Thanks much!


I bought a 175 Suzuki for my "03" 25, had there been a 200 suzi or Yamaha available that is what would be on it. I can cruise @ 4500 rpm, 17p prop, 18 knots & 10 gph, full fuel & water (8,000# ish). Light load, flat water, 19p prop, 6200 rpm = 35 knots @ 27gph Shocked Mr. Green Mr. Green (the boat handles just fine at that speed despite all the B/S you read here!) Moon

Have a good one!!
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Aurelia



Joined: 21 Aug 2009
Posts: 2331
City/Region: Gig Harbor
State or Province: WA
Photos: Aurelia
PostPosted: Tue May 26, 2015 12:08 am    Post subject: Reply with quote

Ours had twin 90s and while that was fine with 2-2.5mpg consumption and 30knot+ top speeds and great for maneuvering, I would have rather had a single 175-200 on the back. Less weight and simpler rigging plus a simple kicker.

Greg

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Gig Harbor
Aurelia - 25 Cruiser sold 2012
Ari - 19 Cruiser sold 2023
currently exploring with "Lia", 17 ft Bullfrog Supersport Pilothouse
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thataway



Joined: 02 Nov 2003
Posts: 20779
City/Region: Pensacola
State or Province: FL
C-Dory Year: 2007
C-Dory Model: 25 Cruiser
Vessel Name: thataway
Photos: Thataway
PostPosted: Tue May 26, 2015 12:48 pm    Post subject: Reply with quote

Many of the earlier boats had 130's which was the souped up 115, and those were under powered. That is what we had, it the boat needed more. I would say at least 150 (although the 135 Honda is the same block, and the only difference is the valve timing at the top end. I also like the 150/175 Hondas, and think that is one of the best combo's of that boat. I cannot comment of the handling over 30 mph on the 25, because with the 130 you could not reach that speed.

As for two 90/s vs one 150, there is a big weight difference (720# for two 90's, and 485 for a single 150. Add a 110# kicker, and you are still over 120 lbs heavier for the dual 90's. The boats are stern heavy to start with.

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Bob Austin
Thataway
Thataway (Ex Seaweed) 2007 25 C Dory May 2018 to Oct. 2021
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
Frequent Sea; 2003 C D 25, 2007 thru 2009
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Home port: Pensacola FL
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journey on



Joined: 03 Mar 2005
Posts: 3593
City/Region: Valley Centre
State or Province: CA
C-Dory Year: 2005
C-Dory Model: 25 Cruiser
Vessel Name: journey on
Photos: Journey On
PostPosted: Tue May 26, 2015 3:50 pm    Post subject: Reply with quote

I got Journey On up to 25 knts. It wasn't the handling I remember, it was the pounding over the ripples. All C-Dorys have a fairly flat bottom and they don't do real well on slicing through the waves.

So, to anybody who gets 35 knts out of a 25 has my compliments. I hope the water was like glass.

I've been underpowered my whole life.

Boris
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smckean (Tosca)



Joined: 18 Jan 2014
Posts: 974
City/Region: Guemes Island (Anacortes)
State or Province: WA
C-Dory Year: 2005
C-Dory Model: 25 Cruiser
Vessel Name: Tosca
Photos: Tosca
PostPosted: Tue May 26, 2015 4:14 pm    Post subject: Reply with quote

I recently did some speed testing. On almost flat water with little or no current, I got 32 MPH (not knots) at 5600 RPM with a S3x14.5x15R SS prop and and Honda 150 on a CD25 loaded relatively heavy and just me on board.
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fidalgoisland



Joined: 31 Jul 2009
Posts: 47
City/Region: Anacortes
State or Province: WA
C-Dory Year: 2004
C-Dory Model: 22 Cruiser
Vessel Name: Sea Critter
Photos: Sea Critter
PostPosted: Tue May 26, 2015 4:50 pm    Post subject: Reply with quote

70 hp on my 2004 Cruiser is just fine.
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localboy



Joined: 30 Sep 2006
Posts: 4656
City/Region: Lake Stevens via Honolulu
State or Province: WA
C-Dory Year: 2007
C-Dory Model: 25 Cruiser
Vessel Name: 'Au Kai (Ocean Traveler)
Photos: 'AU KAI
PostPosted: Wed May 27, 2015 10:17 pm    Post subject: Reply with quote

We have a Suzuki 150DF and it has always done what we needed it to do. I am a type A when it comes to maintenance. We rarely "floor it". Most of our trips are between 3500 and 4500 rpm's. I have had it maxed out with a light load & flat water and she topped out at ~29 knots.

IIIRC Marc at Wefings recommended the Suzuki 175; best of both worlds. Weight of a 150 but more power.

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starcrafttom



Joined: 07 Nov 2003
Posts: 7878
City/Region: marysville
State or Province: WA
C-Dory Year: 1984
C-Dory Model: 27 Cruiser
Vessel Name: to be decided later
Photos: Susan E
PostPosted: Wed May 27, 2015 10:52 pm    Post subject: Reply with quote

I have had the good fortune to drive a lot of boats with a lot of motors and i have always thought the 135 hp to 150 were under powered to my taste. a 175 to 200 is more in line with what should be on the boat.

I have always thought that driving a boat at 25 mph at half or 3/4 throttle was a better idea then driving a boat at 25 mph at full throttle. Better fuel mileage at lower rpms.

I have a 225 on my 27. (bit of a different cdory then the 25) and rarely run at more then 4000rpm ( 25 mph with a heavy boat). I can get up to 35 plus on clean water but have no need to. While fishing the other day we ran back from the bar with 4 on board in heavy chop at 27mph at 4300rpm with the bow down. One of the advantages of having more motor is lowering your bow into the chop and smoothing out your ride with out losing speed. You just burn a little more gas.

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Pat Anderson



Joined: 02 Nov 2003
Posts: 8551
City/Region: Birch Bay, WA
State or Province: WA
C-Dory Year: 2005
C-Dory Model: 25 Cruiser
Vessel Name: Daydream
Photos: Daydream and Crabby Lou
PostPosted: Wed May 27, 2015 10:58 pm    Post subject: Reply with quote

While we have a 150 on Daydream, I sort of have to agree with Tom...run a bigger engine at a lower throttle setting for better overall efficiency. Plus you have the oomph to get 'er really going if the going gets tough.
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Sunbeam



Joined: 23 Feb 2012
Posts: 3990
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C-Dory Year: 2002
C-Dory Model: 22 Cruiser
Photos: Sunbeam
PostPosted: Wed May 27, 2015 11:31 pm    Post subject: Reply with quote

No argument against a larger engine running at a lower RPM, but does that really provide better fuel "mileage"? I thought I had read (here in the past) that basically it takes "X" power to run the boat at "X" speed and strictly for fuel efficiency it doesn't take measurably more or less fuel to be running, say, a 200hp at one level or a 150hp at another level.

(Obviously not talking about extreme outlier engine sizes.)

Is this not generally true then?
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Aurelia



Joined: 21 Aug 2009
Posts: 2331
City/Region: Gig Harbor
State or Province: WA
Photos: Aurelia
PostPosted: Thu May 28, 2015 12:08 am    Post subject: Reply with quote

Larger motors running at a lower RPM (larger prop) to push the same boat the same speed as a smaller motor spinning faster can use less fuel. Brands and models vary based on fueling design and parameters. Talking with an honest professional can reveal some recommendations that are counter intuitive. I clearly remember being surprised by the advice of one of our local experts when it came to re-powering.

Greg

One example graph of two motors on the same boat.

http://s177.photobucket.com/user/Whaler-Fleet/media/CW%20Posts/etec2.jpg.html
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Sunbeam



Joined: 23 Feb 2012
Posts: 3990
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C-Dory Year: 2002
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PostPosted: Thu May 28, 2015 1:43 am    Post subject: Reply with quote

Interesting - thanks for posting.
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JamesTXSD



Joined: 01 Mar 2005
Posts: 7444
City/Region: from island boy to desert dweller
State or Province: AZ
C-Dory Year: 2007
C-Dory Model: 25 Cruiser
Vessel Name: "Wild Blue" (sold 9/14)
Photos: Wild Blue
PostPosted: Thu May 28, 2015 9:08 am    Post subject: Reply with quote

That graph that Greg posted is very interesting. When we were in the buying process for the 25, Jeff M. asked how we intended to use our boat. Our response: "Cruising - displacement speeds and mid to upper teens." He recommended the Honda 135. The Honda 135 and 150 are the same block, with the 150 gaining those extra horses above 4800 RPM.

My original thought was to put twin 90s on... at the time, though, the Honda 90s were not fuel injected. Having FI was important to us.

For our use, the 135 was a good solution. As a side note, most of our boating was done at sea level. The performance at high elevations (Lake Yellowstone: 7,800'; Jackson Lake: 6,800'; Lake Tahoe: 6,200') was a bit lacking (same could be said for the crew Wink ), but a prop change could bring most of that back.

Each owner will have a different idea of the best combination of size/hp/weight/speed. This is a circumstance where "YMMV" is appropriate.

Good luck with the decisions,
Jim
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ssobol



Joined: 27 Oct 2012
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C-Dory Year: 2008
C-Dory Model: 22 Cruiser
Vessel Name: SoBELLE
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PostPosted: Thu May 28, 2015 12:25 pm    Post subject: Reply with quote

If you look at the second graph (click right arrow) you see that the opposite is also true. Although it doesn't say what boat the graph represents but it is still comparing an Etec 150 to a 115. In the second graph you'll see that while the first graph shows that the 150 is more efficient at ~40mph than the 115, in the second graph the 115 is more efficient at ~25mph. The first graph also shows that the 115 is more efficient above ~48mph until the 115 runs out of steam.

Also, the graphs show that the max difference in efficiency (where the engines overlap) is about 1 gph max.

I guess, like a lot of things, the answer is "It depends."
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