View Full Version : 1991 Prostar 190 soft spot, need advise

06-08-2009, 08:41 PM
found a 91 prostar 190 for sale at a good price, looks good, runs good. only problem is a soft spot the size of a shoe between rear of engine cover and back bench seat. is this a BIG problem area or a common area. secondly, is this spot a easy to fix location IF nothing else is wrong, or the worst case scenario for this loation. hoping for best case situation where this is the only spot. the guy wants to sell fast, his kid has moved away for college and has no more use for it

06-08-2009, 08:50 PM
How much is he asking?

06-08-2009, 08:56 PM
Take a look at it...it may well have been repaired in the past.

The good news is, that the piece of the floor that you describe is removable and very simple to replace. I would go see the boat again, and remove the engine box with the floor piece attached and get a good look at it -this will take 2 people, trust me.

To do this, first take out the rear seat. Then look for large screws that hold this part of the floor in place, if they are still there remove them. Then tilt the engine box back and up - if the gas motor box shocks are still there you will have to disconnect them. Pull forward and up and the piece should slide out from under the gas tank.

Not only will you get a good look at the piece in question, you will be able to get a good view of the transmission (look for fluid leaks), the drive line, the upper part of the rudder assembly, blower hoses and steering cable.

Most people replace the piece in question with marine plywood, or pressure treated plywood. If the repair is contained to that piece, the repair is about 1/10 in difficulty...total cost $20 or $30.

06-08-2009, 08:57 PM
That boat is all glass. The floor panel behind the motor box will flex if you step on it.It comes up to access the drive shaft.

06-08-2009, 09:06 PM
6700.00 firm, 520 hours, trailer is in good condition, if i remember correctly, all gauges were working

06-08-2009, 09:08 PM
so jorski and dimminfla has 2 different answers, or are you saying the same thing in a different way. BTW thanks for the quick replies!!!! awesome website!

06-08-2009, 09:15 PM
Mastercraft stopped using wood in their boats in about 1983..

06-08-2009, 09:20 PM
I am not saying that the part is wood. On my 1993 it was made of a honeycomb aluminum material that often got pooched (not sure of what it is in your 1991).

Either way, it often gets replaced in these boats by plywood.

06-08-2009, 09:25 PM
great read on mastercraft history, thanks dmminfla. and no one has chimed in on the price

06-08-2009, 09:34 PM
Do you have any pics?

06-08-2009, 09:40 PM
There is wood in there! It is glass with wood core, kinda like a hollow core door. I had to replace my same floor board. I got a sheet of treated plywood and mixed some fiberglass resin and sealed it off then recarpeted it. Everyone says no wood but, there is a wood core that got wet and collapsed...IMO. I also had to replace the center floor panel which alco had a wood core. I still have the the old floor panels and can post a pic if you would like.

06-08-2009, 09:48 PM
an average joe job or must have experience and $$ to fix

06-08-2009, 09:49 PM
http://img30.imageshack.us/img30/394/91mastercraft.th.jpg (http://img30.imageshack.us/my.php?image=91mastercraft.jpg)

06-08-2009, 09:59 PM
an average joe job or must have experience and $$ to fix

It is a easy fix. You just get a piece of pressure treated plywood cut an eight inch smaller than old piece. Then get some fiberglass resin and skim on three coats with a putty knife. Allow to dry and sand between coats, make sure to get edges good. You might even be able to use old carpet if it is in decent shape. You can use 3m adhesive to glue carpet down. Probably about 60 dollars total to replace.

06-08-2009, 10:18 PM
If it is mechanically sound buy it, that's a good price. How's the interior?

06-08-2009, 10:26 PM
By bamafutbal (http://profile.imageshack.us/user/bamafutbal), shot with Canon PowerShot SD750 (http://profile.imageshack.us/camerabuy.php?model=Canon+PowerShot+SD750&make=Canon) at 2009-06-08
By bamafutbal (http://profile.imageshack.us/user/bamafutbal), shot with Canon PowerShot SD750 (http://profile.imageshack.us/camerabuy.php?model=Canon+PowerShot+SD750&make=Canon) at 2009-06-08

06-08-2009, 10:29 PM
If I was still in the market, I would jump on it!

Hoosier Bob
06-08-2009, 10:34 PM
I am with whoever said honeycomb and aluminum. My 93' has this and there is no sag at all. It is super light and strong. Maybe the 91' had wood but I would doubt it? If it is the same as the peice I have it would most likely been hit but something, dropped or what have you. Do not know if the peices are available but I am sure there are plenty of totals from past years and parts may be found. If it is wood and the shape and size are the same find the 93' panel. No wood and super strong and light!

PS That part is a very minimal part of the decision. Use it to your favor and make sure the rest of the ride is in order. Trailer brakes working?

06-08-2009, 10:38 PM
Mine is a 90, and there is a wood honeycomb between the fiberglass. There was a hull change in 91 so mabye MC stopped usuing wood then, but in a nutshell it is a easy fix! It would not let that piece of floor stop me from buying the boat. Will he let youy sea trial it?

06-08-2009, 11:19 PM
That is a great price....My '93 is the honeycomb aluminum...it's an easy fix..only a couple of hrs...and or course you will need carpet too. Great price like i said...I'm selling my "93 for 11,500.00, but it comes with tower and all the sacs, inc. pump and all safety gear and speakers on tower....

06-08-2009, 11:25 PM
that is a good price in my opinion. I have a 93 and these floor areas are soft, they are honeycomb aluminum and they seperate. 91-94 is same hull and therefore I assume similar construction. i would not let this soft spot cause not to buy, the interior looks very good. can replace floor pieces with marine grade plywood and/or pres treated with resin coating on either.

06-09-2009, 12:20 AM
After seeing the interior, if it's in good mechanical order you have yourself a great deal there Bud.

06-11-2009, 08:05 AM
I have a 1991 and it has a fiberglass floor. There is no soft feeling anywhere, as thick fiberglass was used. Maybe the glass is cracked?

06-11-2009, 10:44 AM
Seeing that the interior is all white, I would guess that it was replaced a few years ago from Mastercraft...for a while before they stopped making replacement skins all together they made them in white for some period of time.

So, I would consider that the boat likely has a fairly new OEM interior an advantage in buying this boat.

Looks good!

07-09-2009, 02:49 AM
hey i'm in bham and have a 95 PS205 that i've walked at least 2 miles around the interior trying to feed skis to kids and so on. its all honeycomb as they say, but that's not the worst thing that could be wrong with it. new interior and soft spots may be indicators that it wasnt' terribly well taken care of. can you get a compression check? that's a great, possibly too low price. I'd enjoy trying to help you check it out. [email protected] if yer still lookin' - otherwise, its likely a great boat, just wonderfully simple to work on and reliable. again, that price seems too low, but hey...buyers market right now for sure. OTOH its a small world, history may be easy to uncover.