Posts: 40
Threads: 21
Joined: Sep 2016
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Home Port: North East, Md. / Chesapeake Bay
Vessel Info: 2000 - 3500 Express,
8.3 CTA Cummins
I have a new to me 3500 express with 450 cummings 8.3 CTAs.
How much antifreeze per engine to winterize.
I will be adding the antifreeze through the sea strainers. I can't find the muffler drain plug, so I need to let the muffler fill with antifreeze too. I will be doing it in the water and the previous owner has run the exhaust hoses from the mufflers straight to the underwater exhaust. Thanks
Posts: 702
Threads: 14
Joined: Dec 2010
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Home Port: Kings Park, NY
Vessel Info: 2003 38' Open Cummin's 6CTA's (450 hp)
09-06-2022, 07:09 PM
(This post was last modified: 09-06-2022, 07:11 PM by ReelMagic.)
I have a 2003 38 Open with the same engines (6CTA 8.3) and have been winterizing them for 15 years, with the boat staying in the water for the winter.. I run 6 gallons of Non-Tox antifreeze through each engine using the raw water strainers as well.. Works for me. May be over kill but better safe than sorry. M2C
Posts: 40
Threads: 21
Joined: Sep 2016
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0
Home Port: North East, Md. / Chesapeake Bay
Vessel Info: 2000 - 3500 Express,
8.3 CTA Cummins
Anyone else know how much antifreeze for a 3500 express with Cummins.
The Mufflers look big, will 8 gallons per engine be enough?
Posts: 46
Threads: 4
Joined: Mar 2020
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Home Port: Gloucester
Vessel Info: 2011 3200 open - cummins QSB 5.9
I have a 3200 w/cummins 5.9 that i use 6 gal each engine. That has worked for me
