Cruisers Forum

Thread Tools Search this Thread Rate Thread Display Modes
Old 21-06-2016, 11:40   #1
Registered User

Join Date: Feb 2013
Posts: 80
Lehman hours

I'm looking at a Marine Trader Trawler that has a Ford Lehman with 4400 hours.
The engine seems to have been maintained well, so how many total engine hours untill some sort of overhaul is needed. And what kind of overhaul. Top end or full redo?
kingwoodie is offline   Reply With Quote
Old 21-06-2016, 16:05   #2
Marine Service Provider

Community Sponsor
Cruisers Forum Supporter

Join Date: Aug 2006
Location: La Paz, Mexico
Boat: 1978 Hudson Force 50 Ketch
Posts: 3,836
Re: Lehman hours

American Diesel Corp
The folks at American Diesel have forgotten more about the Ford Lehman that most ever know. So they would be a good source for engine technical details. They told me that until the engine has 7500hrs on it it's still in the "break in period". Now that I'm sure was a little tongue-n-cheek but I think it also speaks to how long lasting these engines are.
Rich Boren owner of:
Cruise RO Water High Output Water Makers
Technautic CoolBlue Refrigeration
La Paz Cruisers Supply and Yacht Management and Brokerage
SV THIRD DAY is offline   Reply With Quote
Old 21-06-2016, 16:22   #3
Registered User

Join Date: Mar 2010
Location: Wandering around North America
Boat: Defever 43 - Gray Hawk
Posts: 602
Re: Lehman hours

Marine diesels don't die - they get killed. If it's running good, not filling the crankcase with blowby and cleans up once it warms up then don't worry about it.

R.J.(Bob) Evans
R.J.(Bob) Evans
M/V Gray Hawk, 43 Defever Offshore Cruiser
bobofthenorth is offline   Reply With Quote
Old 21-06-2016, 16:55   #4
Senior Cruiser

Cruisers Forum Supporter

Join Date: May 2013
Location: Oregon to Alaska
Boat: Wheeler Shipyard 83' ex USCG
Posts: 2,878
Re: Lehman hours

I haven't done a Ford Lehman in a long time... they are light duty engines.

If it's a non-turbo, not abused but cared for, about it's 1/2 way to an overhaul. If it's a turbo model, near overhaul.

Undamaged but compression loss and smoking overhaul is usually new rod and main bearings, cam bearings, sleeves/bore, pistons, rings. Heads in good shape just valve grind and seals, otherwise complete head rebuild. Rebuild turbo, injector pump, other accessories as needed determined by use. Find an online service manual. Maybe worth buying before buying the engine.
Lepke is offline   Reply With Quote
Old 21-06-2016, 17:36   #5
Registered User

Join Date: Jun 2011
Location: Warwick, RI
Boat: Albin Trawler 40'
Posts: 27
Re: Lehman hours

8,000+ on ours and going well. 7knts @ 1700 rpm.

Sent from my SAMSUNG-SGH-I337 using Cruisers Sailing Forum mobile app
mike66 is offline   Reply With Quote


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not 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 Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
Engine hours how many over 10k hours? stevensuf Engines and Propulsion Systems 1 10-05-2015 19:50
Lehman 120 rebuild? Buddy_Y Engines and Propulsion Systems 10 28-02-2008 18:38
Ford Lehman Mechanic Saildude Engines and Propulsion Systems 4 29-09-2006 18:49
ISO Sources for Ford Lehman Overhaul Kit Geoff S. Construction, Maintenance & Refit 4 01-08-2005 02:19

Advertise Here

All times are GMT -7. The time now is 23:09.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2020, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.