Replacing Main Seacock on 1974 F36

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pwollsch
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Location: Gibraltar, MI

Replacing Main Seacock on 1974 F36

Post by pwollsch »

I have a stuck seacock on my SB engine - the main inlet for engine RWC.
The lock handle broke off.

Looking for advice on how to replace it this off-season. Scary thought tearing into a 40 year old hull.
1072 14 ft Meijers - Sears outboard
1990 17 ft Sea Nymph - 70 Johnson
1992 17 Tracker Deep-V - 40 Yamaha (still own)
1987 266 Cruisers Inc - 460 King Cobra
1974 F36 Trojan - Twin Crysler M400
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BobCT
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Re: Replacing Main Seacock on 1974 F36

Post by BobCT »

I found the easiest way is to start cutting it with a sawz-all. On the inside, cut across under the handle. From underneath, put the blade into the intake hole and make several cuts until you're through the bronze and just hitting the glass. Do the same inside the hull.

At this point, use a hammer and chisel and start collapsing the whole thing on itself and it'll come right out with a little force. The bronze is soft, once you make some cuts the whole thing falls apart.

Bob
1988 10m mid cabin
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Cmount
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Re: Replacing Main Seacock on 1974 F36

Post by Cmount »

I changes all my thru hull fittings last year for the same reason. I used a small fein tool saw and that worked very well. Cut near the hull inside, right at the base, and then cut the three or four screws on the outside of the strainer and tapped it out.

Once you are 2/3 through on the inside, it could also be bent back and fourth and broken off, saving cut time.

http://www.feinus.com/media/navigation/10459.png

Reach out to me if you need more, but once you start it is easy, the first cut is the hardest! ;)
1987 Jersey Dawn
"The Other Woman II"
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pwollsch
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Location: Gibraltar, MI

Re: Replacing Main Seacock on 1974 F36

Post by pwollsch »

Thanks guys. I will follow that approach.
1072 14 ft Meijers - Sears outboard
1990 17 ft Sea Nymph - 70 Johnson
1992 17 Tracker Deep-V - 40 Yamaha (still own)
1987 266 Cruisers Inc - 460 King Cobra
1974 F36 Trojan - Twin Crysler M400
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aaronbocknek
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Location: baltimore, md (alexandria, va and middle river,md) PARKSIDE MARINA

Re: Replacing Main Seacock on 1974 F36

Post by aaronbocknek »

i had the same thing happen with my 32 the first month i owned her. i left it that way until spring, then had my mechanic, john, swap out all the old seacocks for new ball valves. as for the hull, well, trojan hulls are SOLID glass and there should be little or no issues there. john just changed them out one for one. a good person to talk to is p-dogg. last year, when both of our tri cabins were hauled, and yes, they were side by side!!!, he changed out all of them, including the massive underwater exhaust system. the hulls are thick and they are strong.
1982 F-36 TRI CABIN ENTERPRISE
PARKSIDE MARINA IN MIDDLE RIVER, MD
aaronbocknek@gmail.com
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