Ford Lehman Engine - SailNet Community
LinkBack Thread Tools
post #1 of 4 Old 04-06-2007 Thread Starter
Ne'er Do Well
TSteele65's Avatar
Join Date: Oct 2006
Location: Maryland
Posts: 569
Thanks: 0
Thanked 1 Time in 1 Post
Rep Power: 11
Ford Lehman Engine

I'm looking at a boat built in '72, with the original Lehman 120 engine. The broker just let me know the engine has 10,000 hours on it, but he's not sure when/if it's had a major overhaul or rebuild.

I'm thinking re-power, but I'd be interested in hearing alternative opinions.
TSteele65 is offline  
Quote Quick Reply Share with Facebook
Sponsored Links
post #2 of 4 Old 04-06-2007
Senior Member
Valiente's Avatar
Join Date: Jun 2006
Location: Toronto
Posts: 5,491
Thanks: 0
Thanked 2 Times in 2 Posts
Rep Power: 13
I don't think you'll know without having it hauled, throughly inspected and the oil analyzed. I would suspect that a 35 year old marine diesel with 10,000 hours on it was due for a complete overhaul, and depending on corrosion, cost of replacement parts and availability, might be past it. I saw a boat with an otherwise fine Thorneycroft diesel I rejected because the cost to repower was 50% of the asking price.

On the other hand, there are 40 year old Perkins 4-107s and 108s happily chugging away, not to mention Atomic 4s going back to the '50s. Parts and more importantly, a competent "user base", is available in order to make the best decisions.

A repower can give you a warranty, likely greatly improved emissions and fuel efficiency, and access to current parts. Depending on your usage, this might be the way to go. If you want a slow-turning workhorse, however, you could just as easily drop in a reconditioned Perkins for a fraction of a new repower...if it doesn't mean rebuilding engine stringers and mounts!

I will say that the old engines were designed to be rebuilt. Whether that is cost-effective is another story.
Valiente is offline  
Quote Quick Reply Share with Facebook
post #3 of 4 Old 04-06-2007
Senior Member
Join Date: Apr 2006
Location: Big Horse Creek, NC - Summer
Posts: 100
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 12
This is the link to American Diesel. The owner, Bob Smith, was president of the Lehman division of Ford. American Diesel Corporation

They can put you in touch with companies that can give you a price for a rebuild of the Lehman. Unless you do it yourself, I'm guessing that it won't be that much less than a new Yanmar. The real question is, do you want to put a new engine in a '72 boat or spend less with the rebuild.

Lehman is a great engine, but even one that has been babied, will need major work @ 100,000 hours.

stoutwench is offline  
Quote Quick Reply Share with Facebook
post #4 of 4 Old 04-06-2007
Seņor Member
TrueBlue's Avatar
Join Date: Oct 2004
Location: Narragansett Bay
Posts: 4,858
Thanks: 0
Thanked 2 Times in 2 Posts
Rep Power: 15
My Lehman Super Turbo 90 is just a baby at 1,780 hrs. It's got to be one of the most reliable diesels ever marinized. Of course, much credit is due to the Ford tractor engine, but leave it to those Brits to make a great marine conversion.

True Blue . . .
sold the Nauticat
TrueBlue is offline  
Quote Quick Reply Share with Facebook

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

Similar Threads
Thread Thread Starter Forum Replies Last Post
Engine questions, Ford Lehman photojoe Gear & Maintenance 1 02-09-2007 11:13 PM
Runaway Diesel Engine Ben Hilke Gear and Maintenance Articles 0 07-19-2004 08:00 PM
Surveying a Diesel Engine Tom Wood Buying a Boat Articles 0 01-26-2003 07:00 PM
Surveying a Diesel Engine Tom Wood Gear and Maintenance Articles 0 01-26-2003 07:00 PM
Replacing the Diesel Engine Sue & Larry Gear and Maintenance Articles 0 06-12-2000 08:00 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