Repowering transom-gap outboard, installation? - SailNet Community
Reply
 
LinkBack Thread Tools
post #1 of 31 Old 09-17-2010 Thread Starter
Learning to sail
 
Join Date: Aug 2010
Location: San Francisco Bay Area
Posts: 116
Thanks: 1
Thanked 2 Times in 2 Posts
Rep Power: 5
 
Repowering transom-gap outboard, installation?

I'm looking at buying an 1972 Ericson 27. It was factory fitted with an outboard, but that motor has long since departed. The current outboard it has is dead, and I'd like to replace it with a completely new one, presumably 9 HP or 15 HP. (I specifically do not want to repower it with a used motor.)

1) What type of outboard do I need? Do new 2-stroke outboards still exist, or do I need to get a 4-stroke? The 4-strokes I've seen new are about $2K; is this about right, or is that paying too much?

2) How major of a deal is it to install the new outboard? Can I just drop the new outboard in, or will I need to drill holes in the transom? The previous outboard was clamped only, with no through-holes. I've attached some pictures of the old outboard mounting in case that's helpful.

3) Do I need to worry about getting an outboard that is not dimensionally-compatible? I know I will need to get the proper shaft length, but do I need to worry about the cowling fitting inside of the space available?

Edit: I think I may have been screwed by the outboard dealer. See my latest post.
Attached Thumbnails
transom1.jpg   transom2.jpg   transom3.jpg  

Last edited by aaronwindward; 09-22-2010 at 03:48 AM.
aaronwindward is offline  
Quote Quick Reply Share with Facebook
Sponsored Links
Advertisement
 
post #2 of 31 Old 09-17-2010
Telstar 28
 
sailingdog's Avatar
 
Join Date: Mar 2006
Location: New England
Posts: 43,290
Thanks: 0
Thanked 15 Times in 12 Posts
Rep Power: 14
         
Aaron—

The problem you're going to run into is that most modern engines in the size range you're looking at are going to be way too large to fit in that cutout. The cutout was designed for TWO-STROKE engines, which are generally a good deal more compact than their current FOUR-STROKE cousins.

You should probably get a 6 HP four-stroke with an extra long shaft. That would probably be about the largest engine that will work, given the size of current four-stroke engines.

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.
sailingdog is offline  
Quote Quick Reply Share with Facebook
post #3 of 31 Old 09-17-2010
Senior Member
 
dabnis's Avatar
 
Join Date: Jul 2007
Location: Truckee, CA
Posts: 8,644
Thanks: 2
Thanked 116 Times in 114 Posts
Rep Power: 9
 
Aaron,

You might try to make up a crude template out of a
cardboard box using the proposed motor's dimensions.
I suggest you get the largest HP motor with the longest
shaft that will fit. I had a Coronado 25 with a 6HP 2 stroke
which was marginal for SF Bay conditions. Changed to
a 15 HP 2 stroke which worked really well.

Dabnis
dabnis is offline  
Quote Quick Reply Share with Facebook
post #4 of 31 Old 09-17-2010
Telstar 28
 
sailingdog's Avatar
 
Join Date: Mar 2006
Location: New England
Posts: 43,290
Thanks: 0
Thanked 15 Times in 12 Posts
Rep Power: 14
         
Dabnis—

The template is a great idea. However, the OP isn't interested in getting a used motor, and I don't believe that they're selling new TWO-STROKE motors, especially in the People's Republic of California—which has stricter emissions standards than the rest of the country in many ways.

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.
sailingdog is offline  
Quote Quick Reply Share with Facebook
post #5 of 31 Old 09-17-2010
Senior Member
 
dabnis's Avatar
 
Join Date: Jul 2007
Location: Truckee, CA
Posts: 8,644
Thanks: 2
Thanked 116 Times in 114 Posts
Rep Power: 9
 
Dog,
My thought on the template was for any motor he is
considering. From looking at the picture it looks like
the old motor may be a Evinrude/Johnson 9.9 or 15 Hp
2 stroke. Craigs List may be a good source if he decides
on a 2 stroke rather than a new 4 stroke, it's his call.
At least the old 2 stroke fits and even a good used motor
would be a whole lot less.

Aaron, electric start would be a good option along with
remote controls, almost as good as an inboard from an
operating standpoint.

Dabnis
dabnis is offline  
Quote Quick Reply Share with Facebook
post #6 of 31 Old 09-17-2010
Sundance 23
 
carl762's Avatar
 
Join Date: Jan 2010
Location: Portland Oregon
Posts: 878
Thanks: 2
Thanked 5 Times in 5 Posts
Rep Power: 6
 
Up round these here parts 4-strokes are going for $2,800 on up.

Water is Life
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
carl762 is offline  
Quote Quick Reply Share with Facebook
post #7 of 31 Old 09-17-2010
Senior Member
 
casioqv's Avatar
 
Join Date: Jun 2009
Location: Riverside, CA
Posts: 410
Thanks: 1
Thanked 2 Times in 2 Posts
Rep Power: 7
 
AFAIK you can't get 2 strokes anymore. The new 4 strokes are much more fuel efficient, but the single cylinders have a bad vibration, and the two cylinders are much heavier and larger than the old 2 cylinder 2 strokes at the same power level.

A 2 stroke makes a lot more sense than a 4 stroke if you don't plan to motor long distances. Otherwise, you'll need to look at single cylinder 4 strokes and get used to the vibration (although they are quieter).

It's quite a shame you're not willing to consider used engines. I picked up a 1967 Evinrude for $200, and with another $100 in parts it's probably good for another 43 years of reliable use. It's your money though!

Last edited by casioqv; 09-17-2010 at 06:54 PM.
casioqv is offline  
Quote Quick Reply Share with Facebook
post #8 of 31 Old 09-17-2010
Senior Member
 
dabnis's Avatar
 
Join Date: Jul 2007
Location: Truckee, CA
Posts: 8,644
Thanks: 2
Thanked 116 Times in 114 Posts
Rep Power: 9
 
Agree with Casioqv,

I ran my 15 HP Evinrude 2 stroke for 10 years, Wide open for
hours on end, never flushed it. It ran as when new when I sold the boat,
never had any problems of any kind. Scanning through Craig's List
many motors appear to be in good shape with not too many hours
on them. If you are selective and carefull you can probably find a
good 9.9 or 15 HP 2 stroke, like what appears to be on the boat in your
pictures. Best part is that it fits, although a long shaft model is
much better in the short high chop we have in the bay and outside.
I think Dog is right, the 4 strokes of equivelent power probably wouldn't
fit. As mentioned earlier I started with a 6HP on a boat smaller than
yours and had to change it to a 15 HP for inside and outside the bay.
dabnis is offline  
Quote Quick Reply Share with Facebook
post #9 of 31 Old 09-18-2010
islander bahama 24
 
newhaul's Avatar
 
Join Date: Feb 2010
Location: bremerton wa
Posts: 1,713
Thanks: 7
Thanked 53 Times in 53 Posts
Rep Power: 6
 
evinrude 15 h.O. the only one i could find new that says carb compliant myself i would do the cl thing for a good used unit. 15 hp keep up on zinks and impellers and all is good much better power to weight ratio.
newhaul is offline  
Quote Quick Reply Share with Facebook
post #10 of 31 Old 09-19-2010
Capt Blithe
 
Join Date: Sep 2005
Posts: 46
Thanks: 2
Thanked 0 Times in 0 Posts
Rep Power: 0
 
A used engine isn't going to make the OP happy. I loved the honesty of the post: drilling holes in the transom was a bigger deal than desired. Futzing with an old fashioned ignition will ruin the boating experience for this new skipper. I'm too lazy to post a link (nor do I know how) but I think Tohatsu makes small two stroke outboards that are sold online or at boat dealers.

Aaron, go with a new engine for sure. Push the button, it starts. Modern two strokes are great. The four stroke is much quieter though. A plus. I'll bet that the dealer where you want to buy a 4 stroke from can hook you up with a guy who can enlarge your engine well for under $100. A couple of years from now, you'd do it yourself.
tgzzzz is offline  
Quote Quick Reply 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:
OR

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
Show Printable Version Show Printable Version
Email this Page Email this Page



Similar Threads
Thread Thread Starter Forum Replies Last Post
Outboard Mount and the transom of a Cal 20 lostcoast Cal 9 03-04-2013 12:26 PM
transom outboard backing board tmalcolm Gear & Maintenance 11 06-17-2010 01:19 PM
Repowering with an outboard? MattGardner Gear & Maintenance 14 08-19-2008 05:03 AM
Transom Cutout for Outboard...Problems? Gillfowdy Sailboat Design and Construction 9 04-02-2008 08:48 PM
transom ladder installation alibi Gear & Maintenance 4 08-06-2004 06:15 PM

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome