6hp Saildrive or 8hp regular? - 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 08-01-2012
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
6hp Saildrive or 8hp regular?

I've got a 24' sailboat (about 3500 lbs) that is currently powered by an 8hp Evinrude 2 stroke. For a bunch of different reasons I'm considering replacing the 8hp with a newer model. At first I was looking at the Honda 4stroke 8hp, but came across a nice deal on a Tohatsu 6hp Saildrive with an extra long shaft.

I understand that the general rule is about 1hp per 500 lbs, so that would suggest the 6hp will be a little underpowered, but I'm curious what difference the high thrust prop on the Saildrive model will make. I also like the appeal of the extra long shaft in a chop, as my current motor will bob out at times. Other advantages of the 6hp is a much lighter weight and a fair bit less expensive, but that will be little consolation if I find myself underpowered when I need it most.

Any thoughts on whether the 6hp Saildrive will work, or if I should stick with an 8hp or even a 9.9?
__________________
--
Skipper Chris
Reply With Quote Quick reply to this message Share with Facebook
  #2  
Old 08-01-2012
lajimo's Avatar
Senior Member
 
Join Date: Sep 2011
Posts: 187
Thanks: 0
Thanked 1 Time in 1 Post
Rep Power: 4
lajimo is on a distinguished road
6hp Saildrive or 8hp regular?

Years ago I had a long shaft 4.5 hp johnson powering a 23' sovereign sloop with a total wt of 3500 and it did just fine powering the boat, even in chop. I bet the 6 hp will be sufficient unless you frequently need to run against really strong currents.
Reply With Quote Quick reply to this message Share with Facebook
  #3  
Old 08-01-2012
Senior Member
 
Join Date: Mar 2008
Posts: 886
Thanks: 0
Thanked 1 Time in 1 Post
Rep Power: 7
GaryHLucas is on a distinguished road
6hp Saildrive or 8hp regular?

I had a Johnson 6 hp on an oday 20 with a standard prop. It seemed quite under powered. I did a little research and found out they offered a different low pitch larger diameter prop for using it as a trolling motor on a heavy power boat. That prop made a huge difference and I was very pleased with the motor after that. In reality a 6 hp motor with a very large very low pitch prop could push a large boat even against high winds, but at a very slow speed.
Reply With Quote Quick reply to this message Share with Facebook
  #4  
Old 08-01-2012
Banned
 
Join Date: Jul 2007
Location: Truckee, CA
Posts: 8,591
Thanks: 2
Thanked 115 Times in 113 Posts
Rep Power: 0
dabnis is on a distinguished road
Re: 6hp Saildrive or 8hp regular?

I had a Coronado 25 at about 4,500 lbs with a 6HP 2 stroke which was OK in calm conditions but in San Francisco Bay with strong currents and steep high chop it struggled at times. Went with a 15 HP 2 stroke, which was the same size and weight as the 9.9HP, and it was plenty. On both motors I went with a one inch less pitch prop which worked fine. If your 8HP has more thrust than you need the 6HP may be OK? Don't know your sailing conditions but when things get nasty it is nice to have extra power. I have a 6HP Tohatsu with the lowest pitch prop on a 750 lb Jon boat and at 6,000 feet elevation it will run at 10.5 MPH on a plane. It runs perfectly. I think about the only way to really tell if 6HP is enough is to try one?

Paul T
Reply With Quote Quick reply to this message Share with Facebook
  #5  
Old 08-01-2012
mikehoyt's Avatar
Senior Member
 
Join Date: Nov 2000
Posts: 684
Thanks: 0
Thanked 1 Time in 1 Post
Rep Power: 15
mikehoyt is on a distinguished road
Re: 6hp Saildrive or 8hp regular?

I have the Tohatsu 6hp 20" long shaft with hi thrust prop on a 27 foot 3800 lb boat. It is ideal
__________________
Mike

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 08-01-2012
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
Re: 6hp Saildrive or 8hp regular?

The HT prop is what makes the motor work and 6 HP is plenty as in the old days the prop was real a really bad two blade

The 6HP is singel cylinder with vibration VS the two cylinder 8 HP units which are much smother




Seafever 29' 8000# ++ was broken down in NYC and i had to bringe it out to glen cove over 16 miles which the 4HP did at 4.5 knots

Now the boats all happy and the A4 will push it to 6+ but the stern squat is so bad 5.5 knots is pretty much the speed unless you like standing in water
__________________
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
  #7  
Old 08-02-2012
Senior Member
 
Join Date: Dec 2011
Location: Lydia .La.
Posts: 205
Thanks: 2
Thanked 2 Times in 2 Posts
Rep Power: 4
Southron Spirit is on a distinguished road
Re: 6hp Saildrive or 8hp regular?

i have a 6 hp tohatsu saildrive on my spirit 23 with the throttle barely cracked it will do 5mph according to the gps .
__________________
S/V Erin Go Bragh
Spirit 23

Last edited by Southron Spirit; 08-02-2012 at 09:29 PM.
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
Yacht designs with 70+gal water tanks as part of regular specs? TheCruisingKitty Boat Reviews 18 04-25-2012 08:23 AM
Stainless or regular steel for exhaust nipple? killarney_sailor Gear & Maintenance 11 09-25-2011 08:21 PM
C&C 29 - shoal draft Vs. regular keel MichaelZZ Boat Review and Purchase Forum 5 01-09-2011 04:43 PM
Which Honda genst 20001 or 1A, Companion or regular? SanDiegoChip Gear & Maintenance 5 11-16-2009 07:22 PM
General questions painting non skid and regular surface Survivor Gear & Maintenance 1 07-28-2009 10:59 PM


All times are GMT -4. The time now is 04:32 AM.

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.