View Full Version : How to hide a fat sac

08-13-2012, 06:02 PM
I have a 1988 Mastercraft Tristar 190 that has had the rear seat modified to create a sundeck that conceals a fat sac. The sundeck is made of the seat parts so I still have all the seat parts. The 'problem' is that I could really use the seating but we also love the sundeck; and I am not willing to give up the sac! So, I was looking at the boat one day trting to figure out how keep the sac concealed and plumbed in while having the rear seat. I know some people put the sac on the seat but I dont want to do that. I noticed that the floor of my boat, where the seat is supposed to go, is elevated from the rest of the floor. I was wondering if I can hide the sac under the floor and put the seat back in its original position. I am not sure what is under the floor in this area. Does anybody else know? Oh yeah, and it would be really cool if I could some how make the rear seat convert into a sundeck. I am sure with a little time and thought I could figure out how to do all of this but I figured if somebody else has already done it, well....why reinvent the wheel!

These are the pics that I have so far. I will get more of the rerar sundeck/fat sac area soon

Any help will be greatly appreciated!

08-18-2012, 05:19 PM
I like what you've done with the sac and making a sun deck! Looks awesome! Is there a way you could make the sundeck shorter? Or is it already touching the top o the sac? Was kinda thinning you could have a low profile back seat.. One with a 6" back rest instead of a 18" one.. Would make the passengers in the back sit higher but at least they would have somewhere to sit.

08-19-2012, 11:41 AM
Thanks! There isn't much clearance between the under-side of the sun deck and the top of the sac. You don't happen to know if I can bury the sac in the 'elevated' floor area, do you?

08-20-2012, 08:27 AM
Not a clue! I'm new to mastercraft boats so I'd be the wrong guy to ask.. I have the seat and center part of the floor out of mine to fix the shaft right now and by the pictures of yours it looks like there is a 4-6" raise in the floor, mine is maybe 4" deep under the floor with lines and everything underthere so I would guess your not going to have enough room.. But I could be wrong! I might steal your idea with the sundeck this winter if someone else in my crew of people buys a boat and I don't have to worry about hauling 6 people

08-20-2012, 09:59 AM
I don't remember the exact floor rise but I am guessing you're right; there are probably lines and floor stringers in there. I still think I might tear into it this winter and see what I can come up with. I really would like the extra seating. Next time I have the boat out I can send you some more detailed pics of the sundeck construciton. Really pretty basic actually. Just made a platform the is hinged with (2) heavy duty butt hinges and rests where the arm rests would mount. Marine grade wood with a coating of black paint. Screw the seat parts to the platfrom from the bottom and there you have it! I be sure to strap it with a tie-dwon while transporting though. I would hate for a gust of wind to get under it and lift it!

08-31-2012, 05:07 PM
Thanks man!

Miss Rita
08-31-2012, 05:18 PM
you can remove the center panel in the back, and what you'll find is the propshaft and steering cable going back to the rudder. The raised sections on each side aren't removable. No room for a fat sack where you're looking.

08-31-2012, 05:44 PM
i am looking to make a sundeck on my 1985 stars and stripes. i have been thinking on how to do it. i was thinking something like a futon. so when you need a seat its there and when you want a sundeck/fatsac area. its there.

09-01-2012, 10:35 AM
That'd be pretty cool if you could pull it off! That'd be ideal for me if you do it be sure and post so we can see it

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10-05-2012, 03:11 PM
So my g/f and I just had a baby; which means boating is over (well, baby is already 5 weeks old!) So, I decided to tear into my sundeck and see if I could come up with an idea to have a convertible seat/sundeck and still have the fat sac. So far...so good! I will post pictures once I get it all dry fit. Hoping to finish construction today, get the carpet, vinyl and paint done next week, and then wait until spring to try it!

10-05-2012, 03:46 PM
I admit when I saw the title of this thread, I thought it was about how to keep your wife or ex wife hidden

10-05-2012, 04:31 PM
Awesome! Keep us posted as I am very interested.. I thought of how to do it in my head.. It'd be hard to explain though

Sent by the new iPhone 5!

11-18-2012, 08:36 PM
Any updates?


11-18-2012, 08:42 PM
I started it but didn't have time to finish before I had to hang it up for the winter! It is just way to much to explain and probably wouldn't make any sense without pictures! I will get some stuff posted as I pick it back up in the spring

11-18-2012, 08:58 PM
Ok keep us posted


11-18-2012, 11:04 PM
Is that boat beached?