Reply
 
Thread Tools Search this Thread Display Modes
 
Old 06-10-2019, 02:23 PM   #41
Veteran Member
 
City: st john's , nl
Join Date: Sep 2013
Posts: 38
120 hp

I would keep the 120 hp and rebuild. I had a smaller Lehman in a 36' boat (displacement hull) for a number of years, and it was faster than the speed of "heat"!
Very odd that 3000 hrs you would have a problem.

Best of luck

J
__________________
Advertisement

Virginias Run is offline   Reply With Quote
Old 06-10-2019, 02:49 PM   #42
Veteran Member
 
City: Seattle
Join Date: Jul 2017
Posts: 29
Seen some video's of older (and larger) diesel engines in inland waterway vessels in Europe. (Deutz, MAN, Brons, etc.) Many of these have a sequence of things to be done before starting and one of them is to pump the lub oil (which has been sitting at the bottom of the engine) throughout the engine with a manual pump. I would not know if one could do that with a Lehman, never heard of it, but hey, not too old to learn. Good luck and yes, my money would be on a rebuild, those Lehmans are amazingly reliable engines.
__________________

GB3295 is offline   Reply With Quote
Old 06-10-2019, 03:20 PM   #43
Member
 
boatmon's Avatar
 
Join Date: Jun 2010
Posts: 22
Ahoy all. The engine is coming out on Wednesday. Wabi Sabi will be drydocked as we have the seized Lehman evaluated and most likely rebuilt.

More will be revealed then. I will keep you all posted.

Capt Harry
boatmon is offline   Reply With Quote
Old 06-10-2019, 03:58 PM   #44
Guru
 
OldDan1943's Avatar
 
City: Aventura FL
Vessel Name: Kinja
Vessel Model: American Tug 34 #116
Join Date: Oct 2017
Posts: 7,589
Quote:
Originally Posted by boatmon View Post
Ahoy all. The engine is coming out on Wednesday. Wabi Sabi will be drydocked as we have the seized Lehman evaluated and most likely rebuilt.

More will be revealed then. I will keep you all posted.

Capt Harry
I hope it is nothing too expensive nor time consuming...
I think you will be happy reinstalling the original (rebuilt) engine. No surprises.
__________________
The meek will inherit the earth but, the brave will inherit the seas.
OldDan1943 is offline   Reply With Quote
Old 06-10-2019, 06:32 PM   #45
TF Site Team
 
Comodave's Avatar
 
City: Au Gres, MI
Vessel Name: Never Say Never
Vessel Model: President 41 DC
Join Date: Jul 2015
Posts: 11,806
Quote:
Originally Posted by Nomad Willy View Post
Como,
Are you guys taking pics w i-pads ect?
Been my experience that you must take the pic w the pad (or ?) oriented correctly. Need to take some test pics and take notes how the pad/camera was oriented. Then if you always hold the pad that same way all the pics on TF will be right side up. Or should I say right end up. The saying right side up is not right. Confusing anyway .... You don’t want the side up you want the top or bottom up. But there’s no word for that that includes both .. ???
Usually I use an iPhone and mostly keep it the same way. Some photos taken at the same time and orientation willupload differently. Don’t know, I am not a computer expert by any means.
Comodave is offline   Reply With Quote
Old 06-11-2019, 03:05 AM   #46
Senior Member
 
City: Aposentillo
Join Date: Jul 2018
Posts: 135
Quote:
Originally Posted by Choices View Post
I would be willing to bet it is your dampner plate. Sounds just like a rod letting go or a dropped valve. If you have rust in bell housing even more proof.

The pieces fall between the block and flywheel.

Try turning crank backward, to see if it falls free.

Dampner plate is only good for 2500 hrs. Never heard of a Lehman failing catastrophically. Great engine.

Changed mine at 5000 hours, noise reduction was dramatic. Plate was completely shattered.
It is never a good idea to turn a motor backwards...
Juggerknot is offline   Reply With Quote
Old 06-11-2019, 03:37 AM   #47
Member
 
steve marcus's Avatar
 
City: Clare
Vessel Name: ARGO
Vessel Model: Bristol 42
Join Date: Oct 2014
Posts: 22
Exhaust back wash

I am wondering how it seized. Were you driving along and it suddenly stopped or was it seized when you went to start it after it had been turn of for a few days.
I had the misfortune of buying my boat and the motors (120 Lehman's) ran fine but the time before that engine run, it got a guts full of sea water as a result of an unacceptable exhaust system, and when it was run for me it pumped that water through the engine. After I took possession one of the motors wouldn't start as it was seized and what actually stopped the motor from turning over was salt on the mains that was left there after the water evaporated from the engine heat. The motor was still tight until I took the last main bearing off. I probably could have used the original bearings as there was no engine damage or bearing damage but decided to replace anyway while the motor was down, the rings were okay as was everything else.
I must stress that it was impossible to turn the motor at all until all the big ends were off and half the mains and even then it was very very tight.
This info is redundant if you had and oil or heat related seizure
good luck
__________________
Steve Marcus
Port Broughton
South Australia
steve marcus is offline   Reply With Quote
Old 06-11-2019, 05:53 AM   #48
Guru
 
psneeld's Avatar
 
City: Ft Pierce
Vessel Name: Freedom
Vessel Model: Albin 40
Join Date: Oct 2011
Posts: 23,668
Quote:
Originally Posted by Juggerknot View Post
It is never a good idea to turn a motor backwards...
A slight attempt to rock the engine to get the crank turn seems pretty common in the Lehman world.


Is there something in particular with this engine that a half rotation in the opposite direction will hurt?


I understand that on some engines it can be a problem depending how many rotations are done.
psneeld is offline   Reply With Quote
Old 06-11-2019, 06:16 AM   #49
Guru
 
twistedtree's Avatar
 
City: Gloucester, MA
Join Date: Jan 2013
Posts: 6,536
Quote:
Originally Posted by psneeld View Post
A slight attempt to rock the engine to get the crank turn seems pretty common in the Lehman world.


Is there something in particular with this engine that a half rotation in the opposite direction will hurt?


I understand that on some engines it can be a problem depending how many rotations are done.

Where and how is it a problem? I've never heard of it being an issue either.
__________________
MVTanglewood.com
twistedtree is offline   Reply With Quote
Old 06-11-2019, 07:14 AM   #50
Guru
 
psneeld's Avatar
 
City: Ft Pierce
Vessel Name: Freedom
Vessel Model: Albin 40
Join Date: Oct 2011
Posts: 23,668
Post #46 triggered my post.
psneeld is offline   Reply With Quote
Old 06-11-2019, 07:21 AM   #51
Guru
 
Cigatoo's Avatar
 
City: Narragansett Bay
Vessel Model: Grand Banks 36
Join Date: Sep 2016
Posts: 1,209
Quote:
Originally Posted by psneeld View Post
Post #46 triggered my post.
Many diesels will take a 1/4 to a 1/2 turn backwards on their own when shut down. At least the older ones.
Cigatoo is offline   Reply With Quote
Old 06-11-2019, 07:36 AM   #52
Guru
 
jleonard's Avatar
 
Join Date: Jun 2008
Posts: 4,247
Quote:
Originally Posted by Cigatoo View Post
Many diesels will take a 1/4 to a 1/2 turn backwards on their own when shut down. At least the older ones.
I've seen a few degrees at shut down on my old Dodge truck Cummins, but never 1/4 turn (90 degrees).
__________________
Jay Leonard

New Port Richey,Fl
jleonard is offline   Reply With Quote
Old 06-11-2019, 08:14 AM   #53
Guru
 
Cigatoo's Avatar
 
City: Narragansett Bay
Vessel Model: Grand Banks 36
Join Date: Sep 2016
Posts: 1,209
Quote:
Originally Posted by jleonard View Post
I've seen a few degrees at shut down on my old Dodge truck Cummins, but never 1/4 turn (90 degrees).
I never measured.
Cigatoo is offline   Reply With Quote
Old 06-11-2019, 09:04 AM   #54
Guru
 
City: Carefree, Arizona
Vessel Name: sunchaser V
Vessel Model: DeFever 48
Join Date: Apr 2008
Posts: 9,253
Possibly I'm alone. I do not find it odd that a +40 year old diesel, of unknown previous maintenance and having sat for 6 years - failed. Yes, 3,000 hours seems low for a Lehman, but not necessarily a good singular measuring point.
sunchaser is offline   Reply With Quote
Old 06-11-2019, 09:15 AM   #55
Guru
 
ben2go's Avatar
 
City: Upstate,SC
Vessel Name: Shipoopi
Vessel Model: derilic sailboat
Join Date: May 2012
Posts: 2,803
I wonder if an exhaust valve was partially hanging open and over the course of the run it slowly sucked water back into a cylinder and seized the engine. I have seen this on gas engines before. It's the main reason marine engines run cams with no overlap if the exhaust is water cooled.
__________________
This is my signature line. There are many like it but this one is mine.

What a pain in the transom.

ben2go is offline   Reply With Quote
Old 06-11-2019, 09:21 AM   #56
Guru
 
City: Boston
Vessel Name: Adelante
Vessel Model: IG 30
Join Date: Nov 2016
Posts: 1,206
Quote:
Originally Posted by psneeld View Post
Is there something in particular with this engine that a half rotation in the opposite direction will hurt
The only way to bar a Lehman is a 1 1/4" nut holding the pulley on to the crank. Turning it backwards on a seized engine will simply unscrew the nut. But other than that issue, no problem in rotating backwards
SoWhat is offline   Reply With Quote
Old 06-18-2019, 03:07 PM   #57
Member
 
boatmon's Avatar
 
Join Date: Jun 2010
Posts: 22
Look what I just brought home today.... Still not sure why engine seized. Pulled the dampener plate off when I got home and all is as it should be.

More will be revealed when I start taking this one apart. We decided on having a new rebuilt 120 going back in. What the heck, it's only money!
Attached Thumbnails
20190618_145537.jpg  
boatmon is offline   Reply With Quote
Old 06-18-2019, 03:16 PM   #58
Senior Member
 
SeaBreeze's Avatar
 
City: Va Beach
Vessel Name: SeaShell
Vessel Model: 1974 Marine Trader 34 Sedan
Join Date: Aug 2018
Posts: 169
Boatmon where will you be getting your newly rebuilt from and what are they charging for one if you don't mind. I have the same engine and have always been curious.
SeaBreeze is offline   Reply With Quote
Old 06-18-2019, 03:18 PM   #59
TF Site Team
 
Comodave's Avatar
 
City: Au Gres, MI
Vessel Name: Never Say Never
Vessel Model: President 41 DC
Join Date: Jul 2015
Posts: 11,806
That is what boats are for, to give you a place to use all your excess money...
Comodave is offline   Reply With Quote
Old 06-18-2019, 03:21 PM   #60
Member
 
boatmon's Avatar
 
Join Date: Jun 2010
Posts: 22
The Lehman's are pretty basic. Most all diesel rebuilders could do one. I've been quoted from $7K to $11K.
__________________

boatmon is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

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



» Trawler Port Captains
Port Captains are TF volunteers who can serve as local guides or assist with local arrangements and information. Search below to locate Port Captains near your destination. To learn more about this program read here: TF Port Captain Program





All times are GMT -5. The time now is 05:33 AM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2021, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2006 - 2012
×