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-   -   School me on 1/2 Closed Cooling Systems Please (https://www.offshoreonly.com/forums/do-yourself-boating-budget/372148-school-me-1-2-closed-cooling-systems-please.html)

MooresWarlock 06-23-2021 10:30 AM

No It's on an aluminum I-beam tandem trailer

Baja Rooster 06-24-2021 11:29 PM


Originally Posted by underpsi68 (Post 4794747)
steel trailer?

Mine is. I think the dunk line is pretty obvious.


https://cimg9.ibsrv.net/gimg/www.off...f307108c2.jpeg

Dave M 06-25-2021 09:40 AM


Originally Posted by Baja Rooster (Post 4794669)
I honestly don’t know why boats don’t come with at least partial closed cooling from the factory. I don’t see any legit downside to it.

They pretty much did starting with the 496's and 525's.

flashgordon 06-26-2021 03:22 PM

i changed my motorws over to full closed system, thought i would be in NC, but will be one day,,anyways, bought my heate exchangers thru here used,,i did add to the brackets holding exchangers .think i paid 800 or 100 for both tanks?? my engine shop said was better running closed system.

good luck.......
https://cimg7.ibsrv.net/gimg/www.off...49de53f1f4.jpg
https://cimg5.ibsrv.net/gimg/www.off...debf6f23b7.jpg
https://cimg9.ibsrv.net/gimg/www.off...6a196974df.jpg

HawkX66 06-29-2021 07:15 AM


Originally Posted by flashgordon (Post 4795143)
i changed my motorws over to full closed system, thought i would be in NC, but will be one day,,anyways, bought my heate exchangers thru here used,,i did add to the brackets holding exchangers .think i paid 800 or 100 for both tanks?? my engine shop said was better running closed system.

good luck.......


https://cimg9.ibsrv.net/gimg/www.off...6a196974df.jpg

What did you use for a circulating pump to heat exchanger hose? Monitor's kit has you cut the factory hose. I want to replace mine, but it seems like a complete waste to buy a $60 hose just to cut it off...

flashgordon 06-29-2021 09:05 AM


Originally Posted by HawkX66 (Post 4795367)
What did you use for a circulating pump to heat exchanger hose? Monitor's kit has you cut the factory hose. I want to replace mine, but it seems like a complete waste to buy a $60 hose just to cut it off...

i used a johnson crank driven pump...works fine..i guess they were used on volvo motors uses ago
yes i had to some plumbing tricks with hose...had to cut on going from stack water outlet feeding up to heat exhanger,,had to make it longer

hope this helps....found pumps online from warehouse out of florida,,paid 150 a pump,,saw them listed for 250 on diff sites
https://cimg8.ibsrv.net/gimg/www.off...d15200b061.jpg
https://cimg1.ibsrv.net/gimg/www.off...3dff25ab24.jpg
https://cimg5.ibsrv.net/gimg/www.off...7ef1fa9711.jpg


HawkX66 06-29-2021 10:03 AM


Originally Posted by flashgordon (Post 4795385)
i used a johnson crank driven pump...works fine..i guess they were used on volvo motors uses ago
yes i had to some plumbing tricks with hose...had to cut on going from stack water outlet feeding up to heat exhanger,,had to make it longer

hope this helps....found pumps online from warehouse out of florida,,paid 150 a pump,,saw them listed for 250 on diff sites

Nice set up. I'm actually just asking about the one hose you had in the pic I quoted. I'm using the factory BBC style circulating pump. I can probably just look at an auto parts store for one that's similar. It's nothing special which is why I don't want to spend $60 on a Merc one just to cut it.

flashgordon 06-29-2021 11:00 AM


Originally Posted by HawkX66 (Post 4795402)
Nice set up. I'm actually just asking about the one hose you had in the pic I quoted. I'm using the factory BBC style circulating pump. I can probably just look at an auto parts store for one that's similar. It's nothing special which is why I don't want to spend $60 on a Merc one just to cut it.

yea that hose in first pic,,,i had to cut and make longer,,as my heat exchangers sat up little higher..
why do u have to cut that hose,,,???
it goes from stock pimp lower outlet,,,up to thermo housing correct???

good luck....

HawkX66 06-29-2021 11:24 AM


Originally Posted by flashgordon (Post 4795417)
yea that hose in first pic,,,i had to cut and make longer,,as my heat exchangers sat up little higher..
why do u have to cut that hose,,,???
it goes from stock pimp lower outlet,,,up to thermo housing correct???

good luck....

The Monitor system sits lower. When you cut the factory hose it fits. The first pic below shows when I rough cut mine. The one below it is the factory set up.

https://cimg0.ibsrv.net/gimg/www.off...8d18c29745.jpg
https://cimg3.ibsrv.net/gimg/www.off...1cd92975f.jpeg

flashgordon 06-29-2021 06:29 PM


Originally Posted by HawkX66 (Post 4795422)
The Monitor system sits lower. When you cut the factory hose it fits. The first pic below shows when I rough cut mine. The one below it is the factory set up.

https://cimg0.ibsrv.net/gimg/www.off...8d18c29745.jpg
https://cimg3.ibsrv.net/gimg/www.off...1cd92975f.jpeg


ahhh,,,,,,,i see your heat exchanger sits lower than mine,,,
looks like you could almost cut yours ,,put in a 45 degree elbow in the center ,,so hose mates up to your tanl outlet better.
its all fun..........
but i am at the end of all this fun...
boat is going for sale soon.
good luck........
i added a 8 inch peice to extend my hose,,, i got it from summit...


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