Finally Powered to my liking!

A forum for discussion of how to rig and tune your boat or kicker to achieve the best sailing performance.

Moderators: Catigale, Paul S, Heath_Mod, beene, Hamin' X, kmclemore, tangentair

User avatar
Phil M
Captain
Posts: 801
Joined: Sun Jun 08, 2008 11:29 am
Sailboat: Other
Location: 43' Jeanneau, Saskatoon, SK, Canada

Re: Finally Powered to my liking!

Post by Phil M » Thu Feb 05, 2015 7:16 pm

dlandersson wrote:Isn't everything in Canada measured in Imperial whatevers? :)

Yes, our beer is measured in Imperial tankards. :P

User avatar
mallardjusted
Engineer
Posts: 174
Joined: Fri Oct 21, 2005 7:33 pm
Sailboat: MacGregor 26X
Location: Puget Sound, 2001 MACX4169K001 "Aqua Dawg", 70hp Yamaha

Re: Finally Powered to my liking!

Post by mallardjusted » Thu May 07, 2015 12:19 pm

mallardjusted: The Michigan aluminum 101036 (14" x 11P) was ok, but on the higher end (6200-6300) for rpm. The Michigan 10132 (13 1/2" x 15P) is what I have ....
An update on the prop for my Yamaha 70 ........ I did a 4 day San Juan Islands trip, and I was FULLY LOADED! 2 adults, 2 extra batteries (for a total of 4 .... the 2 extras for CPAP machines), 10 gallons water, 21 gallons fuel, 2000W Honda generator, pop/food/etc, etc. I found the several hundred extra pounds impacted my RPMs with the 13 1/2" prop. Max RPMs only got up to 5400 (instead of 5800 when lightly loaded), and my top speed reduced to 20mph. I am going to go back to the 14" x 11P prop, that should get me into the more efficient RPM zone when loaded.

bahama bound
Captain
Posts: 533
Joined: Wed Sep 21, 2011 9:45 am
Sailboat: MacGregor 26X
Location: charleston sc
Contact:

Re: Finally Powered to my liking!

Post by bahama bound » Thu May 07, 2015 4:44 pm

mallardjusted wrote:
mallardjusted: The Michigan aluminum 101036 (14" x 11P) was ok, but on the higher end (6200-6300) for rpm. The Michigan 10132 (13 1/2" x 15P) is what I have ....
An update on the prop for my Yamaha 70 ........ I did a 4 day San Juan Islands trip, and I was FULLY LOADED! 2 adults, 2 extra batteries (for a total of 4 .... the 2 extras for CPAP machines), 10 gallons water, 21 gallons fuel, 2000W Honda generator, pop/food/etc, etc. I found the several hundred extra pounds impacted my RPMs with the 13 1/2" prop. Max RPMs only got up to 5400 (instead of 5800 when lightly loaded), and my top speed reduced to 20mph. I am going to go back to the 14" x 11P prop, that should get me into the more efficient RPM zone when loaded.
how much of that 21 gallons did you burn ? How many miles ? How much of that was motoring ?

User avatar
mallardjusted
Engineer
Posts: 174
Joined: Fri Oct 21, 2005 7:33 pm
Sailboat: MacGregor 26X
Location: Puget Sound, 2001 MACX4169K001 "Aqua Dawg", 70hp Yamaha

Re: Finally Powered to my liking!

Post by mallardjusted » Thu May 07, 2015 7:19 pm

how much of that 21 gallons did you burn ? How many miles ? How much of that was motoring ?
Used approximately 19 gallons for 70 to 75 statute miles (actually put some more fuel in the tanks during the trip .... not wanting to chance running out!).

All was motoring ...... with my bad knees, my mast and sails are always left at home!



As a side note, "Richard" sent me a note about using the CPAP ..... I've tried sending a pm reply twice, but it just sits in the Outbox. I have no idea how to get it sent! :| But, rather than run my CPAP directly to the battery, I use a 240W inverter (costs approx $30). Seems like it regulates the voltage better .... used it 3 nights without charging. Without the humidifier I believe it uses up to 2 amps per hour.

User avatar
Seapup
Captain
Posts: 923
Joined: Tue Nov 16, 2010 10:05 am
Location: 2002 26x - Virgina Beach, Va

Re: Finally Powered to my liking!

Post by Seapup » Fri May 08, 2015 6:43 am

Sounds like a good motor for the mac, barely any size or weight difference to a 50 and a significant performance increase.

User avatar
tp56ihs
Chief Steward
Posts: 98
Joined: Sun Dec 16, 2012 4:51 pm
Sailboat: MacGregor 26X
Location: Wilmington, NC

Re: Finally Powered to my liking!

Post by tp56ihs » Thu Jun 18, 2015 11:16 am

I was wondering if the transom needed to be strengthened for the extra HP when going to a Yamaha 70. I have a 1998 Honda 50 and thinking on a change in the next year or so.

Wind Wager :macx:

User avatar
ris
First Officer
Posts: 415
Joined: Sat Feb 28, 2015 7:27 pm
Sailboat: MacGregor 26X
Location: Frostproof Florida

Re: Finally Powered to my liking!

Post by ris » Thu Jun 18, 2015 1:04 pm

Hey mallardjusted I did get your pm. Thanks for the info. I am going to try and source a 12 v dc cpap machine.

User avatar
Catigale
Site Admin
Posts: 10363
Joined: Fri Jun 11, 2004 7:59 pm
Sailboat: MacGregor 26X
Location: Admiral .............Catigale 2002X.......Lots of Harpoon Hobie 16 Skiffs....Island 17
Contact:

Re: Finally Powered to my liking!

Post by Catigale » Fri Jun 19, 2015 10:17 am

Pm sidebar....

PM sit in your outbox until the recipient reads them, unlike email

Rich has been busy testing novel lightening ( for Kevin) methods involving magnets suspended from planes this summer

User avatar
mallardjusted
Engineer
Posts: 174
Joined: Fri Oct 21, 2005 7:33 pm
Sailboat: MacGregor 26X
Location: Puget Sound, 2001 MACX4169K001 "Aqua Dawg", 70hp Yamaha

Re: Finally Powered to my liking!

Post by mallardjusted » Fri Jun 19, 2015 11:08 am

I was wondering if the transom needed to be strengthened for the extra HP when going to a Yamaha 70.
I didn't do anything extra on the transom. The outboard is only a few pounds different (30 or less?). I would think about it if I was going up to 90 or more horses with 80 lbs or more sitting on the transom.

Post Reply