Outboard for 23ft sailboat - SailNet Community

   Search Sailnet:

 forums  store  


Quick Menu
Forums           
Articles          
Galleries        
Boat Reviews  
Classifieds     
Search SailNet 
Boat Search (new)

Shop the
SailNet Store
Anchor Locker
Boatbuilding & Repair
Charts
Clothing
Electrical
Electronics
Engine
Hatches and Portlights
Interior And Galley
Maintenance
Marine Electronics
Navigation
Other Items
Plumbing and Pumps
Rigging
Safety
Sailing Hardware
Trailer & Watersports
Clearance Items

Advertise Here






Go Back   SailNet Community > On Board > Gear & Maintenance
 Not a Member? 
  #1  
Old 12-23-2010
Junior Member
 
Join Date: Dec 2010
Posts: 7
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
Brucet1988 is on a distinguished road
Outboard for 23ft sailboat

What is the minimum hp outboard I should consider for a 23ft sailboat?
Reply With Quote Quick reply to this message Share with Facebook
  #2  
Old 12-23-2010
JKCatalina310's Avatar
Senior Member
 
Join Date: Nov 2010
Location: Randolph, MA
Posts: 164
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 5
JKCatalina310 is on a distinguished road
6 hp on C&C 24

Our old boat was a C&C 24 and had a 6 hp Johnson 4-stroke. That pushed the boat fine, comfortably at 5 kts.
__________________
“Twenty years from now you will be more disappointed by the things that you didn't do than by the ones you did do. So throw off the bowlines. Sail away from the safe harbor. Catch the trade winds in your sails. Explore. Dream. Discover.” -Mark Twain
Reply With Quote Quick reply to this message Share with Facebook
  #3  
Old 12-23-2010
sailingdog's Avatar
Telstar 28
 
Join Date: Mar 2006
Location: New England
Posts: 43,290
Thanks: 0
Thanked 11 Times in 11 Posts
Rep Power: 13
sailingdog is just really nice sailingdog is just really nice sailingdog is just really nice sailingdog is just really nice sailingdog is just really nice
Any reason for posting this twice?
__________________
Sailingdog

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Telstar 28
New England

You know what the first rule of sailing is? ...Love. You can learn all the math in the 'verse, but you take
a boat to the sea you don't love, she'll shake you off just as sure as the turning of the worlds. Love keeps
her going when she oughta fall down, tells you she's hurting 'fore she keens. Makes her a home.

—Cpt. Mal Reynolds, Serenity (edited)

If you're new to the Sailnet Forums... please read this
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
.

Still—DON'T READ THAT POST AGAIN.
Reply With Quote Quick reply to this message Share with Facebook
  #4  
Old 12-23-2010
LakeSuperiorGeezer's Avatar
Senior Member
 
Join Date: Oct 2010
Posts: 551
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 5
LakeSuperiorGeezer is on a distinguished road
Three to four horsepower per ton. This is more than necessary to attain hull speed, but you could need the extra for headwinds and waves. If the boat weighs 3000 pounds, then figure 4.5 to 6 HP. If you want to calculate speed in knots, take the square root of the horsepower, multiply by 15 and divide by the beam. Say you have an Erickson 23 with a 7.9 foot beam and 4 HP engine, which gives 3.4 knots, but you should probably go with 6 horsepower for this 3200 pound boat in bad weather.

Last edited by LakeSuperiorGeezer; 12-23-2010 at 09:46 AM. Reason: Miss calculation
Reply With Quote Quick reply to this message Share with Facebook
  #5  
Old 12-23-2010
tommays's Avatar
Senior Member
 
Join Date: Sep 2008
Posts: 4,282
Thanks: 1
Thanked 29 Times in 29 Posts
Rep Power: 7
tommays will become famous soon enough


The formula is flawed in that outboard high thrust prop design has evolved to allow the motors to use there full HP at displacement speed

While i would not do it everyday i moved Seafever at 29' and well over 8000# over 16 miles to be hauled with a 4HP high thrust unit at 4.5 knots with a pretty dirty bottom


And on my J24 nothing above 4HP makes any difference in any weather
__________________
1970 Cal 29 Sea Fever

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

1981 J24 Tangent 2930
Tommays
Northport NY


If a dirty bottom slows you down what do you think it does to your boat
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Reply With Quote Quick reply to this message Share with Facebook
  #6  
Old 12-23-2010
LakeSuperiorGeezer's Avatar
Senior Member
 
Join Date: Oct 2010
Posts: 551
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 5
LakeSuperiorGeezer is on a distinguished road
The old rule of thumb I used was for inboard engines. Not sure why you should be so much faster. You might have been going downwind a little.
Reply With Quote Quick reply to this message Share with Facebook
  #7  
Old 12-23-2010
Member
 
Join Date: Aug 2010
Location: St. John's, NL
Posts: 36
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
cdhickey is on a distinguished road
We've got an Evinrude 8hp 2 stroke on our 24' (3750 lbs), and it will push us all day at about 5 kts.
__________________
--
Skipper Chris
Reply With Quote Quick reply to this message Share with Facebook
  #8  
Old 12-23-2010
Banned
 
Join Date: Jul 2007
Location: Truckee, CA
Posts: 8,591
Thanks: 2
Thanked 114 Times in 112 Posts
Rep Power: 0
dabnis is on a distinguished road
Brucet,

I had a Coronado 25, about 4,500 lbs, i think. Started with a 6HP
2 stroke which was OK for calm conditions. Changed to a 15 HP
which was more than enough for the high head winds and steep chop
in San Francisco Bay. 6HP may be enough for your boat depending
on its weight and windage. Don't know what your sailing conditions
are or your motor mount configuration. If it is transom mounted,
suggest you get the longest shaft with a high thrust prop that will fit.
I think there may be very little weight difference between a 6HP
and an 8HP motor? In my opinion,FWIW, when things get nasty one
can never have too much power.

Dabnis
Reply With Quote Quick reply to this message Share with Facebook
  #9  
Old 12-23-2010
mstern's Avatar
Senior Member
 
Join Date: May 2002
Posts: 719
Thanks: 17
Thanked 8 Times in 7 Posts
Rep Power: 13
mstern is on a distinguished road
I have an 8hp two stroke on my Oday 23; it is adequate to push the boat at hull speed at about 2/3 throttle. My boat weighs about 3500 lbs, with equipment and a couple of passengers. The 8 hp replaced an older 9.9 two stroke, which was less efficient. Nowadays, if you are buying a new outboard, it will have to be a four stroke. You can probably use a 6 hp four stroke on a 23 footer.
Reply With Quote Quick reply to this message Share with Facebook
  #10  
Old 12-23-2010
Senior Member
 
Join Date: Oct 2006
Location: Tampa, FL
Posts: 150
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 9
BlueWaterMD is on a distinguished road
Had a Honda 8hp on my 23' and it pushed it 7.5 knots. If I had to do it over agoin I would go with the 6hp as it is more than enough power and there is a significant weight savings with the 6hp
Reply With Quote Quick reply to this message Share with Facebook
Reply

Quick Reply
Message:
Options

By choosing to post the reply above you agree to the rules you agreed to when joining Sailnet.
Click Here to view those rules.

Register Now

In order to be able to post messages on the SailNet Community forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
Please note: After entering 3 characters a list of Usernames already in use will appear and the list will disappear once a valid Username is entered.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

 
Posting Rules
You may post new threads
You may post replies
You may post attachments
You may edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On


Similar Threads
Thread Thread Starter Forum Replies Last Post
outboard for sailboat? mventm Gear & Maintenance 27 04-28-2013 10:46 AM
Outboard for 23ft sailboat Brucet1988 Gear & Maintenance 0 12-23-2010 06:11 AM
Outboard Size for 23ft sailboat? snider General Discussion (sailing related) 37 08-16-2009 06:38 PM
Best Pocket Cruiser under 23ft? henrynlouisville General Discussion (sailing related) 20 04-25-2009 04:18 AM
Wanted a 23ft sailboat/yacht Franksalt Boat Review and Purchase Forum 2 04-08-2001 01:07 PM


All times are GMT -4. The time now is 08:20 PM.

Add to My Yahoo!         
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
SEO by vBSEO 3.6.1
(c) Marine.com LLC 2000-2012

The SailNet.com store is owned and operated by a company independent of the SailNet.com forum. You are now leaving the SailNet forum. Click OK to continue or Cancel to return to the SailNet forum.