Reply
 
Thread Tools Search this Thread Display Modes
 
Old 09-08-2019, 09:43 PM   #21
Newbie
 
City: Vashon, Wa
Join Date: Sep 2019
Posts: 2
thanks

Thanks for you quick reply. I am planning to have the pump checked out ASAP. You have both verified what I suspected.

Cheers from Vashon
__________________
Advertisement

Pugetrawler is offline   Reply With Quote
Old 09-09-2019, 02:52 PM   #22
Guru
 
catalinajack's Avatar
 
City: Edgewater, MD
Vessel Name: Catalina Jack
Vessel Model: Defever 44
Join Date: Nov 2011
Posts: 2,435
Quote:
Originally Posted by Comodave View Post
I took Bob Smiths last Lehman seminar. He talked about the oil in the 120 injection pump and how it gets diluted with diesel. His opinion was that this was a critical issue and should not be overlooked. I would fix it asap. Some will say it is ok, but Bob did not. Now who are you going to listen to?
A friend is still running his Lehman 120 after finding out eight years ago that the injection pump oil should be changed. Before that he ran it for THIRTEEN years and probably 2,000 hours without changing the oil. When he did it was very diesely. That pump is still running that 120 today. I don't know what to conclude from this except maybe these pumps are more robust than most think. Maybe it's also why Bob Smith updated his oil change recommendation from 50 to 150 hours. Perhaps no one has ever tested how long a pump can go without an oil change so no one one really knows what the best interval ought to be, hence, change it often.
__________________

catalinajack is offline   Reply With Quote
Old 09-09-2019, 03:40 PM   #23
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: 11,833
Fortunately my engines don’t have the same system as the 120 so I don’t have a separate oil to change. However if I had a 120 I would change the oil. Just because someone got away without oil or changing the oil does not mean that it will work for everyone. Do you run your engine without oil or diluted oil, of course not. So why would anyone do that to an expensive injection pump. There is a signature on this site something like; There is the right way, the wrong way and the way someone said they got away with... Getting away with it does not make it right. And Bob did say that 50 hours was the recommended starting point and that any given engine might be able to go longer. He said this at his last seminar shortly before he died, so I will take it as his last opinion.
__________________
Boat Nut:
If you are one there is no explanation necessary.
If you aren’t one, there is no explanation possible.
Comodave is offline   Reply With Quote
Old 09-09-2019, 04:02 PM   #24
Guru
 
psneeld's Avatar
 
City: Ft Pierce
Vessel Name: Freedom
Vessel Model: Albin 40
Join Date: Oct 2011
Posts: 23,680
This is what I have heard through the years....


Bob also has said the 50 hrs was simpler than trying to figure out if you DID have dilution.


Bob also said that a new injection pump probably could go longer but the trick was to figure out when the dilution started and start decreasing change interval.


He also changed his mind on more than a few things through the years and now his son has changed a few more.


Bomac who knows a thing or two about Lehman's has some different thoughts too from Bob's.


It's OK to understand why an expert might say one thing knowing most owners aren't mechanically inclined or given to analytical thought and think beyond that.
psneeld is online now   Reply With Quote
Old 09-09-2019, 04:41 PM   #25
Guru
 
catalinajack's Avatar
 
City: Edgewater, MD
Vessel Name: Catalina Jack
Vessel Model: Defever 44
Join Date: Nov 2011
Posts: 2,435
I wasn't suggesting not to change the oil. I change mine at 100 hours. The anecdote I related was to illustrate that these pumps, apparently, can take a lot of abuse. Some boaters might be frightened into an expensive repair unnecessarily just because their oil hadn't been changed out for a long time or it was run dry. Change the oil at 50, 100, 150 hours, whatever you feel comfortable with and run the pump until it dies. Methinks that will be a long time coming but with boats one never knows. Injector pumps generally don't just stop one day. There will be warning signs.
Quote:
Originally Posted by Comodave View Post
Fortunately my engines don’t have the same system as the 120 so I don’t have a separate oil to change. However if I had a 120 I would change the oil. Just because someone got away without oil or changing the oil does not mean that it will work for everyone. Do you run your engine without oil or diluted oil, of course not. So why would anyone do that to an expensive injection pump. There is a signature on this site something like; There is the right way, the wrong way and the way someone said they got away with... Getting away with it does not make it right. And Bob did say that 50 hours was the recommended starting point and that any given engine might be able to go longer. He said this at his last seminar shortly before he died, so I will take it as his last opinion.
__________________

catalinajack 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 10:54 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
×