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Trans cooler dumps
I'm trying to figure out the best way to dump my trans cooler water overboard. They are 3/8" hose. I see 3 options:
1. Send two 3/8" through hull dumps out the sides of the boat. Would be able to use much shorter through hull fittings. 2. Send two 3/8" through hull dumps out the transom of the boat. I would need to find a spot that doesn't dump all over all of my rigging just to keep things cleaner? 3. Send one 3/4" through hull with a tee out the transom. I'm not sure if these would fight each other and if one motor had a litlte more pressure than the other, it could it prevent the other from draining. I'm leaning toward number 1 but am worried you guys are going to say it will look like a jetski or something :) |
https://cimg1.ibsrv.net/gimg/www.off...7397a655c6.jpg
I dump everything overboard off the side . Like you said shorter fittings and easier to access. Once in a while you might get a question on why are your bilge pumps running all the time? lol |
ICD, are dumping any intake water ? I'm going to dump two -6 per intake to relieve the hot water issue in the rear of the intake
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I recall that the side of the outlet was important on a trs transmission cooler. My boat has smaller fittings for the discharge. I can take a picture tonight for you. But its defiantly less than 3/8 fitting. My boat is all original with merc2 transmissions.
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Originally Posted by slpcamaross97
(Post 4674289)
I recall that the side of the outlet was important on a trs transmission cooler. My boat has smaller fittings for the discharge. I can take a picture tonight for you. But its defiantly less than 3/8 fitting. My boat is all original with merc2 transmissions.
Slpcamaross97, I understood the in and out to not matter on merctrans so would be interested in learning more. Makes sense to me that you are just running cool water through a set of internals to cool the oil so direction probably shouldn't matter? The lines on the in and out on the trans are 3/8" so I'm assuming 3/8" would be the dump. Tom |
https://cimg9.ibsrv.net/gimg/www.off...8da12bcf9e.png Here the way I ran them , my boat has merctrans, I ran the dump above the drives now they pump water on the drives as a drive shower. |
Originally Posted by F-2 Speedy
(Post 4674279)
ICD, are dumping any intake water ? I'm going to dump two -6 per intake to relieve the hot water issue in the rear of the intake
https://cimg3.ibsrv.net/gimg/www.off...2c997f8064.jpg |
^^^ you`d have to have higher pressure in the block then the headers.. otherwise there will be no water flow. Isn`t the pressure the same in both?
https://cimg5.ibsrv.net/gimg/www.off...43cbcda3d9.jpg I have two -4AN dumps above the drives. |
That's what I thought at first, it would flow a little, just enough to get rid of the hot spots. I actually put restrictors in the black hose (1/4" drill holes) because the back of the intake and heads ran noticeably colder. I guess path of least resistance, it's pretty much open atmosphere in the tails with a vacuum pulling the water out the pipe.
https://cimg1.ibsrv.net/gimg/www.off...d156b9ae83.jpg |
Originally Posted by ICDEDPPL
(Post 4674396)
^^^ you`d have to have higher pressure in the block then the headers.. otherwise there will be no water flow. Isn`t the pressure the same in both?
https://cimg5.ibsrv.net/gimg/www.off...43cbcda3d9.jpg I have two -4AN dumps above the drives. |
Originally Posted by cig28
(Post 4674386)
https://cimg9.ibsrv.net/gimg/www.off...8da12bcf9e.png Here the way I ran them , my boat has merctrans, I ran the dump above the drives now they pump water on the drives as a drive shower. |
The thru hull fittings came from CP performance or Hardin marine. The 45 degree threaded nipples came from summit racing. |
Originally Posted by ttrm007
(Post 4674581)
Interesting option but I can't figure out what kind of fitting will be long enough to go through the transom. Do you know what -4an fitting you used? Some kind of bulkhead mounted fitting?
https://www.cpperformance.com/p-1148...l-fitting.aspx |
I use a 3/8" dump out the side at the rear of the boat. As for dumping it on the drive like a shower a TRS circulates the gear lube in the drive from bottom to top so they really don't need a shower. You'll find there are very few drive showers on the market for a TRS, like 1.
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Agreed picklenjim that the trs needs no help in cooling, just thought it couldn't hurt and it looks cool. |
Originally Posted by cig28
(Post 4674767)
Agreed picklenjim that the trs needs no help in cooling, just thought it couldn't hurt and it looks cool. Do do you guys agree that in and out don’t matter on merctrans cooling lines? |
https://cimg6.ibsrv.net/gimg/www.off...bcb66bd9c9.png Doesn't matter it's U shaped |
Originally Posted by cig28
(Post 4674807)
https://cimg6.ibsrv.net/gimg/www.off...bcb66bd9c9.png Doesn't matter it's U shaped thank you all. |
Some of them coolers have fins on the U shaped copper tube. If you ever see one, snatch it up!
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I have the one that Kirk from k.c.marine developed. It looks like a heat exchanger with about 10 small tubes running thru it. It works great I never see my oil temp go above 110-125 and that running at steady 4K rpms. Having the oil temp gauge and oil pressure gauge is a great thing to install you can keep an eye on the transmissions functions. |
I also had a 28 cigarette the had two of the standard cooler adapted to the plate that bolts to the transmission. It made it a double pass thru system. Worked well I never had any problems with those transmissions and I owned that boat for 11 yrs and ran it hard. |
Originally Posted by cig28
(Post 4674838)
I have the one that Kirk from k.c.marine developed. It looks like a heat exchanger with about 10 small tubes running thru it. It works great I never see my oil temp go above 110-125 and that running at steady 4K rpms. Having the oil temp gauge and oil pressure gauge is a great thing to install you can keep an eye on the transmissions functions. do you tap into oil reservoir. I wouldn’t think measuring water temp out of cooler would be accurate? |
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Originally Posted by ttrm007
(Post 4674952)
man, I have 14 gauges (16 counting tachs) but no trans temp or pressure. Out of space and money. do you tap into oil reservoir. I wouldn’t think measuring water temp out of cooler would be accurate? |
I'm not using the gauge to measure water pressure . I'm have a gauge for measuring oil pressure and a gauge for oil temp. I put a sender where the drain plug would go and there's a plug on the back of the transmission you can use to run a pressure gauge. |
Originally Posted by ttrm007
(Post 4674813)
love it when I start to second guess something and you guys come with straight facts!! Now there’s no doubt! thank you all. |
Originally Posted by getrdunn
(Post 4675050)
Keep an eye on temps. The Gatling gun style cooler is an excellent investment. Or if your good with copper you can make your own and be much further ahead than stock. One of their weekest links is cooling. I might have missed but make sure you run your hose directly from raw water pump port. |
https://cimg2.ibsrv.net/gimg/www.off...7d33f1b0e9.png
Originally Posted by ttrm007
(Post 4675216)
Do you have a pic or link to the kid of cooler you are talking about? Is it something that replaces the stock cooler?
KC Marine is who I believe I purchased a couple from about 4-5 years ago it seems however having difficulties finding same site. Not sure what happened to them or if they are still in business. I thought the owner or employee use to be an active member here. Might be mistaking though. Thought for sure I'd be able to pull up a pic of one on the net but with a quick search I couldn't. The pic here is just an example of kinda what they look like only bolt in as a direct replacement and externally look the same where they bolt in. Maybe put place in wanted section. Someone will have one on here. I sold mine couple years back. Again this pic is just an example of what I'm refeering to. |
Originally Posted by getrdunn
(Post 4675285)
https://cimg2.ibsrv.net/gimg/www.off...7d33f1b0e9.png KC Marine is who I believe I purchased a couple from about 4-5 years ago it seems however having difficulties finding same site. Not sure what happened to them or if they are still in business. I thought the owner or employee use to be an active member here. Might be mistaking though. Thought for sure I'd be able to pull up a pic of one on the net but with a quick search I couldn't. The pic here is just an example of kinda what they look like only bolt in as a direct replacement and externally look the same where they bolt in. Maybe put place in wanted section. Someone will have one on here. I sold mine couple years back. Again this pic is just an example of what I'm refeering to. |
I heard Kirk from kc marine past away that's way the sight is gone. |
Link to KCMarine website archive
Here is the wayback archive for KCMarine.
https://web.archive.org/web/20170420...m/Default.aspx Kirk was very knowledgable on the TRS and Merc Trans. Never spoke to him, as I got into TRS in 2019, after he passed. There is some good ingoodn the website archive. No photo of the Gatling cooler that I could find. I'm re-building my 280 TRS with Merc Trans. I'll be collating a lot of the Kirk knowledge from his website, his OSO posts, and my own observations. For my own sanity...rather than scouring the TRS posts to find an obscure tidbit I remember reading. An example, on the Website, Kirk mentions that with new fluids, the TRS pre-loads are obsolete. But does not spec what they should be. I found in an OSO post, where he mentions 10% additional pre-load for high HP use drives. More research required, but at least some info vs the ether. Kirk helped a lot of folks out....he will be missed....and I never even knew him. |
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