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Old 07-26-2014, 04:09 AM
Olaff Olaff is offline
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Join Date: Jul 2014
Boat: 1982 Mastercraft Stars & Stripes Powerslot
Location: Deep South
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Antique S&S Bow Bilge doesn't drain

Alright I've had something nagging at me. In my 1982 Stars & Stripes, water that finds its way into the bilge finds its way forward of the pylon mount and into the bow which hapens to be the low spot of the bilge. For some reason Mastercraft decided to mount the bilge pump right under the engine which seems to be high ground in the bilge to me. I have been able to get about 2 gallons of water out of the rear drain plug by lifting the trailer tongue as high as possible so the rudder touches the ground (on my sloped driveway).
I had thought about relocating the pump forward but was concerned about access. So instead I decided to eliminate the low spot.
I did this work in conjunction with reinforcement of my pylon mounts which I am pretty proud of (see 82 S&S Pylon Reinforcement), so the floor forward of the engine was already out.

I started by cutting a "dam" to fit the cross section contour of the hull just forward of my newly reinforced pylon bracket.


I used a 1/2" thick wedi shower waterproofing backer board for this job because they are waterproof, lightweight, mold & mildew resistant, easy to cut, and their sealant/adhesive is a modified urethane that is Mil Spec and used for waterproofing in Amphibious Fighting Vehicles for the USMC
www.wedicorp.com
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Last edited by Olaff; 07-26-2014 at 04:12 AM. Reason: added a pic
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Old 07-26-2014, 04:16 AM
Olaff Olaff is offline
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Boat: 1982 Mastercraft Stars & Stripes Powerslot
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Next I cut a panel of the backer board 21 1/2" wide x 39 3/8" long. I added sealant to the top of my "dam" where the panel will sit right on top. This placement allows the panel to fit right between the stingers where they meet the hull and reach all the way to the forward-most bilge bulkhead in the bow.
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Old 07-26-2014, 04:18 AM
Olaff Olaff is offline
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Boat: 1982 Mastercraft Stars & Stripes Powerslot
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Next I added sealant along all the joints at the sides and front of the wedi panel. This creates an elevated sub-floor so the forward bow is no longer the low point in the bilge.
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Old 07-26-2014, 04:22 AM
Olaff Olaff is offline
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Boat: 1982 Mastercraft Stars & Stripes Powerslot
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The only thing I ALMOST got caught on was the depth of the battery box when I reinstalled the floor. When I realized I didn't account for clearance of that it was an "Oh $hi+" moment. Luckily there was actually about 1/2" of clearance between my new sub-floor and the bottom of the installed battery box.
I would rather be lucky than good!
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Old 07-26-2014, 04:23 AM
Olaff Olaff is offline
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Boat: 1982 Mastercraft Stars & Stripes Powerslot
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All done for now. She goes back in the water tomorrow for a weekend of fun!
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Old 07-26-2014, 04:24 AM
Olaff Olaff is offline
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Boat: 1982 Mastercraft Stars & Stripes Powerslot
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Anyone know how to rotate pics 90 degrees? these show up in the proper orientation on my picture gallery, but are sideways when I post to TT!?!?!
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Old 07-26-2014, 10:06 AM
81mastercraft 81mastercraft is offline
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Join Date: Jun 2014
Boat: Mastercraft, Star and Stripes, 1981, 351
Location: Midwest (Michigan)
Posts: 35
What kind of blige pump are you running? Mine is broke an I need to replace it.
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Old 07-26-2014, 10:20 AM
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thatsmrmastercraft thatsmrmastercraft is offline
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Boat: 1977 Stars & Stripes
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I got a new pump for my '77 through eBay. Sahara automatic for $26.99 delivered.

http://www.ebay.com/itm/261347967930...84.m1497.l2649
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Old 07-26-2014, 10:25 AM
cruiser cruiser is offline
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Great Job, so far I have not had the same problem.
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Old 07-26-2014, 11:19 AM
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ski_king ski_king is offline
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Boat: 1982 Skier19, Powerslot, 351PCM
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Very Nice. I had the same problem with my 82.

In 83, I relocated the pump into the low position. It is a little difficult to get to, but has been trouble free ever since.
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