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 U cooler on crusader 454xl
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Author Previous Topic: Crossover valves Topic Next Topic: Cable oiler  

ken emigh

RO# 25623

Posted - Apr 28 2015 :  05:20:28  Show Profile  Reply with Quote
Found a water leak at the bottom of u cooler.
It appears to be coming from zinc/drain plug.
Do these normally fail?
Ordered a new one will see if it fixes the problem.
Boat is fresh water boat 1996 carver 380.

Thanks in advance

Homeport: Grand Blanc MI

Bruce Herrington

RO# 2612

Posted - Apr 28 2015 :  06:23:27  Show Profile  Reply with Quote
Not that I'm aware of. The zinc should be checked or replaced on a monthly basis though. Learned that lesson the hard way.

"Democracy is two wolves and a lamb voting on what to have for dinner. Liberty is a well-armed lamb contesting the vote. Benjamin Franklin

Homeport: Cape Coral, FL Go to Top of Page


RO# 842

Posted - Apr 28 2015 :  09:22:21  Show Profile  Reply with Quote
there may be junk on the threads. IMO everyone should own a thread tap to clean the threads before replacing zincs. Additionelly I never use the old brass plug because pipe threads are designed for distort on use and may not seal as well the next time.


Homeport: Gulf Coast FL Go to Top of Page

Robyns Nest

RO# 4846

Posted - Apr 28 2015 :  10:04:33  Show Profile  Reply with Quote
They do go bad but with saltwater usage.

Like Bruce said check the threads, or for a possible crack in the housing.

Maybe water in it over the winter.

2003 56 Post Convertible 2x1300HP V12 MAN
2018 30' Sea Hunt Gamefish 2x300HP Yamahas
"The future ain't what is used to be."
- Yogi Berra

Homeport: Monmouth Beach NJ Go to Top of Page


RO# 1159

Posted - Apr 28 2015 :  14:39:42  Show Profile  Reply with Quote
Dittoing some of the above.....Since the fitting and plug are tapered pipe thread and relatively soft, efforts to prevent leaks can result in just slightly over-tightening . Then the fitting has split or the solder seal holding it in the cooler cracks. A mirror and light may help close inspection. Other possibilities are gradoo in the threads, cross-threading or mismatch of SAE and metric when buying instlling new pencil w/ cap.


Homeport: The Vineyard Go to Top of Page

ken emigh

RO# 25623

Posted - May 02 2015 :  05:19:51  Show Profile  Reply with Quote
Inspected bottom as suggested nothing noted.
When I went to unscrew it, it was loose came out very easy.
Inspected the zinc no corrosion to speak off.
Applied some thread sealant and reinstalled.
Started engine and observed for about 10 minutes, no leaking.
Thanks for all the suggestions.


Homeport: Grand Blanc MI Go to Top of Page
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