Thread Tools Search this Thread Display Modes
Old 06-28-2022, 04:21 PM   #1
Senior Member
City: Baltimore Md
Vessel Name: Graceful
Vessel Model: Marine Trader
Join Date: Jul 2013
Posts: 128

Have a Ford Lehman on our boat. The previous owner had always used the green Prestone antifreeze in the engine. Iím going to be flushing the system out and am wondering if I should be using the orange coolant I see thatís for Ford ? If I switch how well do I need to flush the system. Am guessing you canít have any mixing of the two. I guess my question is green or orange ?
gonesailing13 is offline   Reply With Quote
Old 06-28-2022, 05:28 PM   #2
RT Firefly's Avatar
City: Slicker?
Join Date: Oct 2007
Posts: 15,432
Mr. g. I use purple. Hahaha....Seriously, I purchase 50/50 premixed DIESEL anti-freeze from NAPA. I think the "brand name" is Fleetguard. Yep, evidently there is AF specific to diesels. Something to do with cavitation bubbles along the cylinder walls of some diesels (I don't know if the Lehman is one of those but I use it anyway).

As to flushing???? I have no idea. 2X, perhaps? I think you are correct about not mixing different types (colours).
RT Firefly is online now   Reply With Quote
Old 06-28-2022, 06:14 PM   #3
TF Site Team
Comodave's Avatar
City: Au Gres, MI
Vessel Name: Black Dog
Vessel Model: Formula 41PC
Join Date: Jul 2015
Posts: 16,387
We had SP225s in our last boat. I asked Brian at AD and he said it really didnít matter so we used some kind of Zerex.
Boat Nut:
If you are one there is no explanation necessary.
If you arenít one, there is no explanation possible.
Comodave is offline   Reply With Quote
Old 06-28-2022, 07:38 PM   #4
Cigatoo's Avatar
City: Narragansett Bay
Vessel Model: Grand Banks 36
Join Date: Sep 2016
Posts: 1,491
You can use either. Green / yellow or the extended life red / orange. If using the extended life be sure to flush the old coolant out of the system well with fresh water 1st. You can’t mix the extended life with the old green / yellow. Best to mix new coolant of either type with distilled water to eliminate minerals. Cavitation issues were an issue with the high horse power to displacement diesels. Yanmar being the most common. Those engines require the extended life coolant to eliminate the cavitation issues.
Cigatoo is offline   Reply With Quote
Old 06-29-2022, 05:32 AM   #5
TF Site Team
Bacchus's Avatar
City: Seneca Lake NY
Vessel Name: Bacchus
Vessel Model: MS 34 HT Trawler
Join Date: Nov 2014
Posts: 6,574
Good idea to use fistilled water for the last flush.
2008 MS 34 HT Trawler
Bacchus is online now   Reply With Quote

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 02:28 PM.

Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2022, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2006 - 2012