2009 Hunter 36 skin fitting replaced Sep 2015. The photo shows the skin fitting from the holding tank outlet after only 6 years. What gives? Any comments?
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Skin fitting life span?
- Thread starter Meeka
- Start date
Most likely galvanic corrosion from stray electrical current. Was it bonded (electrically) to grounded anode system? Any chance a bronze fitting had been replaced with brass?
It appears to me, based on the wasting, that you could have a bad DC electrical leak or Hunter used brass thru-hulls as opposed to bronze... Are these seacocks bonded? Was this a factory installed seacock? What does the valve look like it was attached to? Hunter does not normally bond from the factory so a DC leak would have to be close by and the bilge wet where that fitting is.......
Please have your boat corrosion tested by an ABYC corrosion trained specialist. Please inspect the rest of the below water metals.. 85-5-5-5 bronze, what Hunter normally uses for thru-hull fittings, can easily last 70+ years.....
Please have your boat corrosion tested by an ABYC corrosion trained specialist. Please inspect the rest of the below water metals.. 85-5-5-5 bronze, what Hunter normally uses for thru-hull fittings, can easily last 70+ years.....
Thanks Maine Sail for your reply.
We have only owned the boat for a few months. The attached ball valve was good, and seemed original, because it looks like the same product has been applied to all threads of similar fittings on the boat. The area surrounding the fitting was dry. (Only started to leak the day before it was replaced. Lucky we were not at sea). I Don’t see how DC current could have caused it since the surrounding area was clean and dry.
Micha
We have only owned the boat for a few months. The attached ball valve was good, and seemed original, because it looks like the same product has been applied to all threads of similar fittings on the boat. The area surrounding the fitting was dry. (Only started to leak the day before it was replaced. Lucky we were not at sea). I Don’t see how DC current could have caused it since the surrounding area was clean and dry.
Micha
Hi Meeka,
Is this fitting the deck pump-out fitting or the sea discharge in the hull side? In any case, rain, salt spray, effluent will become the electrolyte often enough to cause current flow. If the metals are dissimilar, ie different alloys; it will create it's own current flow without any stray DC from your ships electrical system. The picture appears to show severe de-zincafication of a brass fitting. The ball valve fitting connected to it absorbed molecules from the fitting anytime an electrolyte was present.
Is this fitting the deck pump-out fitting or the sea discharge in the hull side? In any case, rain, salt spray, effluent will become the electrolyte often enough to cause current flow. If the metals are dissimilar, ie different alloys; it will create it's own current flow without any stray DC from your ships electrical system. The picture appears to show severe de-zincafication of a brass fitting. The ball valve fitting connected to it absorbed molecules from the fitting anytime an electrolyte was present.
I have seen tank sensors become live inside the holding tank and eat the thru-hull so DC leaks are not just from outside sources... It is usually the last thing in-line that gets wasted on the DC leaks exit.... I have never seen Hunter use yellow brass / high zinc thru-hulls, but anything is possible these days...
There was a recall on the ball valves that Hunter used on some boats. We owned a 2004 H260 at that time. They shipped all new valves and would reimburse us the cost of having them replaced if we submitted a receipt. The problem was some of the valves did not close properly.
I thought they were very good at handling the problem.
Bob
Here it is from the US Coast Guard site,
HUNTER MARINE CORP Company Official: LEN
Model Name: Model Year: 2002-05
Problem 1: THRU HULL BALL VALVE
Problem 2:
HIN Case Open Date: 8/10/2006
Disposition: CLOSED Case Close Date: 2/24/2009
Units 1650 Campaign Open Date 8/12/2006
Boat Type 14 Campaign Close Date 2/24/2009
Severity: L Last Date: 2/24/2009
Comments:
BALL VALVE THRU-HULL SUPPLIED BY MARINE HARDWARE MAY NOT CLOSE WHEN HANDLE IS TURNED TO CLOSED POSITION. MODELS & HINS: H240, HUN24462F203 - HUN24516C404; H260, HUNF0027A202 - HUNF0140B404; H270, HUNK0162F102 - HUNK0173D304; H27, HUN27101G405 - HUN27105J405; H306, HUN30465F102 - HUN30568C404; H326, HUN32255F102 - HUN32362I304; H33, HUN33101I304 - HUN33258J405; H356, HUN35101F102 - HUN35421F304; H36, HUN36101F304 - HUN36231J405; H38, HUN38101C405 - HUN38145J405; H386, HUN38718E102 - HUN38836C404; H410, HUN41332K102 - HUN41357H203; H41, HUN41101J102 - HUN41218J405; P420, HUN42189J102 - HUN42230J304; H426 / 44 AFT COCKPIT, HUN4A101G203 - HUN4A155J405; H426 / 44 DECK SALON, HUN4D101D203 - HUN4D196J405; P450 / 456, HUN54272J102 - HUN45315I405; H460 / 466 / 46, HUN46270G203 - HUN46337J405. 102706 CUR 1 - 71 CORRECTED; 24 W/O PROBLEM. 012507 CUR 2 - 313 CORRECTED; 24 W/O PROBLEM. 051007 CUR 3 - 517 CORRECTED; 24 W/O PROBLEM. RECVD CUR 4 - 539 CORRECTED; 61 W/O PROBLEM. RECVD CUR 5 - 892 CORRECTED; 74 W/O PROBLEM.
I thought they were very good at handling the problem.
Bob
Here it is from the US Coast Guard site,
HUNTER MARINE CORP Company Official: LEN
Model Name: Model Year: 2002-05
Problem 1: THRU HULL BALL VALVE
Problem 2:
HIN Case Open Date: 8/10/2006
Disposition: CLOSED Case Close Date: 2/24/2009
Units 1650 Campaign Open Date 8/12/2006
Boat Type 14 Campaign Close Date 2/24/2009
Severity: L Last Date: 2/24/2009
Comments:
BALL VALVE THRU-HULL SUPPLIED BY MARINE HARDWARE MAY NOT CLOSE WHEN HANDLE IS TURNED TO CLOSED POSITION. MODELS & HINS: H240, HUN24462F203 - HUN24516C404; H260, HUNF0027A202 - HUNF0140B404; H270, HUNK0162F102 - HUNK0173D304; H27, HUN27101G405 - HUN27105J405; H306, HUN30465F102 - HUN30568C404; H326, HUN32255F102 - HUN32362I304; H33, HUN33101I304 - HUN33258J405; H356, HUN35101F102 - HUN35421F304; H36, HUN36101F304 - HUN36231J405; H38, HUN38101C405 - HUN38145J405; H386, HUN38718E102 - HUN38836C404; H410, HUN41332K102 - HUN41357H203; H41, HUN41101J102 - HUN41218J405; P420, HUN42189J102 - HUN42230J304; H426 / 44 AFT COCKPIT, HUN4A101G203 - HUN4A155J405; H426 / 44 DECK SALON, HUN4D101D203 - HUN4D196J405; P450 / 456, HUN54272J102 - HUN45315I405; H460 / 466 / 46, HUN46270G203 - HUN46337J405. 102706 CUR 1 - 71 CORRECTED; 24 W/O PROBLEM. 012507 CUR 2 - 313 CORRECTED; 24 W/O PROBLEM. 051007 CUR 3 - 517 CORRECTED; 24 W/O PROBLEM. RECVD CUR 4 - 539 CORRECTED; 61 W/O PROBLEM. RECVD CUR 5 - 892 CORRECTED; 74 W/O PROBLEM.