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alainP
Joined: 07 Oct 2016 Posts: 198 City/Region: TUCSON
State or Province: AZ
C-Dory Year: 2011
C-Dory Model: 25 Cruiser
Vessel Name: deja la
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Posted: Mon Jul 03, 2017 2:00 pm Post subject: First cruise on CD-25 Deja La |
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I just got back from 10 days or so in Lake Powell, this was my maiden cruise on "deja la". The Yamaha F-150 has a 15 x 15 1/4 alu prop. During the test ride with the PO last November, with a virtually empty boat with only a 1/4 tank of gas we reached 5300 rpm at WOT. i thought that was a bit low at the time but did not give it further thought until this lake Powell trip.
The boat was now fully loaded for a two week cruise, tanks full, plus 2 5gl. jugs one for extra water the other for the Honda 2000 and kicker fuel.
I added Permatrim, the 9.8 kicker and bracket, the honda generator, the inflatable dink, fair amount of tools, more chain on the rode, 2 spare anchors, food, drinks etc..
It was obvious right away that i needed to raise the water line..
In terms of performance it was also clear I needed a different prop, the first day i would top out at 4200. After playing with the permatrim a bit and the trim tabs and with a little lesss fuel in the tank i was able in super flat water to reach 4500 rpm, still not good and my best speed was with the trim tabs all the way down, as soon as i tried to raise them a bit the speed would drop. the Permatrim was up about 30% for best speed. I was very stern heavy and felt like i needed to add weight to the bow so i did not have to rely so much on the trim tabs. Do any of you C-25 owners go through the same thing? what did you end up with prop. wise? Any insight appreciated. Alain Provost |
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thataway
Joined: 02 Nov 2003 Posts: 20829 City/Region: Pensacola
State or Province: FL
C-Dory Year: 2007
C-Dory Model: 25 Cruiser
Vessel Name: thataway
Photos: Thataway
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Posted: Mon Jul 03, 2017 4:24 pm Post subject: |
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We had a C Dory 25 with the 130 Honda (same block as the 115, so less torque than the 150). We started with a 15 " pitch, and had about the same experience or worse. We dropped to a 13", and it was better, still a struggle to get on a plane. I talked with Ken at Prop Gods, and he suggested an 11" pitch. We sold the boat to a C Brat who keeps it on Powell, and he has stuck with the 11".
It is very possible that the 13" pitch may be enough for you. With the 11" you are reving up fairly high still at displacement speeds. But we did get the boat up to the 5500 RPM and on a plane at 17 knots WOT.
Looks as if you got two threads going. I'll copy and put this on the other one. _________________ 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
KA6PKB
Home port: Pensacola FL |
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