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Old 06-08-2013, 02:20 PM
LotusV8 LotusV8 is offline
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Join Date: Jun 2012
Boat: 1989 Mastercraft Prostar 190
Location: North Ga
Posts: 15

I wish I you had posted this 2 weeks earlier......I have been working on the same fix but your documentation is awesome!
My wife recommended I cut the Styrofoam seat with an electric carving knife, it cut like butter and easily maintained the chalk line. I took out a 4 inch section (from the center) in order to preserve the curvature of the top of the back rest. We reconnected the 2 pieces with carpet glue and wood dowels. (Suggested by my wife also)
We added a 1/2 marine grade plywood base to the bottom of the Styrofoam to create a stronger base.
we used Lowes paint sticks to replace the wood staple strips on the Styrofoam, perfect match on the size and they were held in with liquid nails.

We used plastic cups to measure the height so we could build pvc pedestals (6) to use as feet.

Our intention was to get the seat off the floor and create some (not much) under seat storage.

I'm going to try and post some pictures of the process and a final when I can get one.

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Old 06-09-2013, 01:28 AM
gweaver gweaver is offline
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Join Date: Aug 2011
Boat: 1988 Prostar 190
Location: Northern California
Posts: 401
Roush- You definitely sit up higher. In the old seat the top of the seat would hit me in the lower shoulder blade area. Now it's closer to the lower rib area. My wife is a little concerned about it, but I have a feeling that by the end of the summer, the foam will have compressed a bit. I'm expecting about a 1/2" loss in seat height, which should make it about perfect. If it's still a problem, I might pull the skins and cut out some foam, but I really don't think it'll be that bad.

Lotus- that's a sweet looking interior combo. I like how you saved the seat base, but mine was too far gone. The cushion was complete junk, at least as far as the skin went. I like your idea of having the area under the seat open, allows for storage of larger items. I might think about cutting out part of the front, to allow for storage of larger items, but for now this will work. I'm also thinking about maybe putting some LED lighting under the bench, for night time visibility in the walk ways.

Thanks for the positive feedback! I was a little unsure when I started this project- had a vision, but wasn't sure I could pull it off. Glad it worked out. I think next, I'm going to replace the plywood in the ski lockers.

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Old 06-09-2013, 09:40 AM
liledgy liledgy is offline
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Join Date: Nov 2006
Boat: 1985 mastercraft 351
Location: midwest
Posts: 296
When I had my 83 in the upholstery shop I had them customize my rear seat too. Although I didn't have the storage area, being able to remove the middle cushion was a huge benefit.
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Old 06-09-2013, 09:49 AM
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thatsmrmastercraft thatsmrmastercraft is offline
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Join Date: Sep 2008
Boat: 1977 Stars & Stripes
Location: St. Paul, MN
Posts: 13,902
Originally Posted by liledgy View Post
When I had my 83 in the upholstery shop I had them customize my rear seat too. Although I didn't have the storage area, being able to remove the middle cushion was a huge benefit.
Very nice work.

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Old 06-12-2013, 01:20 AM
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NWMike NWMike is offline
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Join Date: May 2013
Boat: 1993 Mastercraft Prostar 190, 285 hp HO, 1:1
Location: Northwest
Posts: 62
That looks sharp. Your efforts paid off.
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Old 11-20-2013, 06:39 AM
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clrussell clrussell is offline
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Join Date: Jul 2012
Boat: 1990 mastercraft p190
Location: midwest
Posts: 1,463
Thanks for posting in the other thread! I couldn't find your original thread until now.
1990 prostar 190, 351, powerslot 1.5:1, tinted windows
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