Engine Replacement - SailNet Community

   Search Sailnet:

 forums  store  

Quick Menu
Boat Reviews  
Search SailNet 
Boat Search (new)

Shop the
SailNet Store
Anchor Locker
Boatbuilding & Repair
Hatches and Portlights
Interior And Galley
Marine Electronics
Other Items
Plumbing and Pumps
Sailing Hardware
Trailer & Watersports
Clearance Items

Advertise Here

Go Back   SailNet Community > Contributing Authors > Gear and Maintenance Articles
 Not a Member? 

Closed Thread
LinkBack Thread Tools
Old 10-27-2001
Contributing Author
Join Date: Jan 2000
Posts: 251
Thanks: 0
Thanked 4 Times in 3 Posts
Rep Power: 16
Dan Dickison is on a distinguished road
Engine Replacement

Can I replace a Yanmar YSE8, 8 hp with a Yanmar GM 20F, 18hp on my 1978 Irwin 10/4 without difficulty? What would be the problems if there were any?

Dan Dickison responds:
Thanks for your question. The short answer is no, but let me qualify that. You can certainly do this, but you need to keep in mind that replacing an auxiliary inboard engine on a sailboat ranks right up there as one of the most difficult, involved, and time-consuming tasks that a boat owner can saddle him or herself with. To do this, you'll first need to line up the motor mounts on the new engine with those that exist in the boat. If they don't line up, you'll have to add new mounts to the boat, which means grinding and glassing in an area that's probably not particularly accessible. Of course you'll have to take a template from the new engine to figure out just where the new mounts need to be installed.

Then you'll have to make sure that the alignment of the prop shaft is similar enough to that of the old engine so that the prop will fit through the shaft log with relative ease. This is perhaps the most important consideration for the job. To be sure that these two engines are compatible in this way, check with your Yanmar dealer or Yanmar representative.

Then you'll have to deal with rewiring and realigning the fuel line, the cooling intake hose, and the exhaust lines. It doesn't take much imagination to realize that this is a pretty involved project. Plan on it occupying at least several full several days of your time. Sue Holt and Larry Hamilton, two of SailNet's most active contributors did this same project (albeit not with the same kind of engines) and they said it basically took them a week, and they had help from professional boat yard staff. Have a look at the article that they wrote for SailNet about this project and you'll get a taste of what you're in for. Here's a link to that piece: Replacing the Diesel Engine.

Quick reply to this message
Closed Thread

Quick Reply

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:
Please enter a password for your user account. Note that passwords are case-sensitive.
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:


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

All times are GMT -4. The time now is 02:35 PM.

Add to My Yahoo!         
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2015, 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.