Silent Thunder Removal 89’ 242 LS
#51
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From: Grand Haven MI
Add me to the list of new 242 owners! Ive been coming to OSO for the last couple of years cause the wealth of knowledge here, Ive just never bothered to register.
Ill also be following your progress Noles as pulling the ST platform is something in my near future as Im pretty certain mine is rotted (not sure of the extent). Ive been mulling over adding an aluminum swim platform for awhile now, but cant justify the cost....plus I really like how the ST platform flows with the lines of the boat, so ive thought about just rebuilding it.
Ill also be following your progress Noles as pulling the ST platform is something in my near future as Im pretty certain mine is rotted (not sure of the extent). Ive been mulling over adding an aluminum swim platform for awhile now, but cant justify the cost....plus I really like how the ST platform flows with the lines of the boat, so ive thought about just rebuilding it.
I don’t think you will know the extent of platform damage until you pull it off, but you can take a moisture meter on inside of transom and hull to make sure you don’t have any water in it. I agree, I didn’t mind the look with platform on, but I want to fix and be done, I dint want to have to check every couple years. Besides I am now hoping to have my own unique 242 with the new platform......and lose about 200lbs of boat weight in the process.
Start a thread and post pics as soon as you get 10 posts,
#52
Great boat but poor idea or calming the sound of the engines (for most I think being able to hear them at full song is the intent).
I’ve never liked the platform and never thought it added to the lines of the boat. Even the tub rail placement is poorly done.
I know there are some purists that think removing the platform takes away from the lines. I say look at a 302, 357, 233/255… Cigarette. Apache. Etc.- None have this godawful thing hanging off the back.
Save your transom. Save some weight over the props. Look good doing.
I’ve never liked the platform and never thought it added to the lines of the boat. Even the tub rail placement is poorly done.
I know there are some purists that think removing the platform takes away from the lines. I say look at a 302, 357, 233/255… Cigarette. Apache. Etc.- None have this godawful thing hanging off the back.
Save your transom. Save some weight over the props. Look good doing.
#53
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From: Grand Haven MI
Great boat but poor idea or calming the sound of the engines (for most I think being able to hear them at full song is the intent).
I’ve never liked the platform and never thought it added to the lines of the boat. Even the tub rail placement is poorly done.
I know there are some purists that think removing the platform takes away from the lines. I say look at a 302, 357, 233/255… Cigarette. Apache. Etc.- None have this godawful thing hanging off the back.
Save your transom. Save some weight over the props. Look good doing.
I’ve never liked the platform and never thought it added to the lines of the boat. Even the tub rail placement is poorly done.
I know there are some purists that think removing the platform takes away from the lines. I say look at a 302, 357, 233/255… Cigarette. Apache. Etc.- None have this godawful thing hanging off the back.
Save your transom. Save some weight over the props. Look good doing.
#54
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From: Grand Haven MI
#55
I’ve seen the platforms not have the exhaust piping. Not on a 242, but on a 206 and 223; only in pictures. I know Silent Thunder was an option. Bigger boats without Silent Thunder had either a small wood platform or no platform at all.
#56
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From: Grand Haven MI
The platform is getting close to being finished and ready for final finishing……I’m still thinking the navy blue (paint) on the boat because that is the easiest for me and I still have enough paint to do it.
In the pics you will also see the supports we made for the platform. They have bases on them that are 10” tall x 2” wide. We put (2) 1/2” holes in them (near the top) to bolt to the boat. We are also making large plates for the inside of transom to help distribute the “point pulling” when weight is on the platform.
A couple questions for you.
1) Are 2 supports enough without anything additional?
2) We put the 2 holes near the top of base thinking that is where the platform would want to pull away from the transom. Should we add more lower?
3) Is 10” tall x 2” enough surface area for bases of supports on outside of transom?
4) I have quite a bit of room to make the inside plates a decent size. What size would be sufficient on a 2” thick transom?
I know I should have asked these questions earlier, but we still have time to make necessary changes before paint.



In the pics you will also see the supports we made for the platform. They have bases on them that are 10” tall x 2” wide. We put (2) 1/2” holes in them (near the top) to bolt to the boat. We are also making large plates for the inside of transom to help distribute the “point pulling” when weight is on the platform.
A couple questions for you.
1) Are 2 supports enough without anything additional?
2) We put the 2 holes near the top of base thinking that is where the platform would want to pull away from the transom. Should we add more lower?
3) Is 10” tall x 2” enough surface area for bases of supports on outside of transom?
4) I have quite a bit of room to make the inside plates a decent size. What size would be sufficient on a 2” thick transom?
I know I should have asked these questions earlier, but we still have time to make necessary changes before paint.



#57
Supports are good, I would add two more fasteners per side (mine has four stainless 3/8 bolts). This will prevent any potential rocking.
We used quarter-inch thick aluminum backing plates on the inside (platform came with all the hardware).
The platform was suspended via nylon webbing and moved into place. Once aligned, everything was cinched tight and then checked again. The holes were drilled using pilots that confirmed to the angle of the bolts holes coming through the mount. We removed the platform, finished the drilling, then used resin on the exposed wood. Once cured, we mounted using 4200 to seal it all up, inside and outside.
We used quarter-inch thick aluminum backing plates on the inside (platform came with all the hardware).
The platform was suspended via nylon webbing and moved into place. Once aligned, everything was cinched tight and then checked again. The holes were drilled using pilots that confirmed to the angle of the bolts holes coming through the mount. We removed the platform, finished the drilling, then used resin on the exposed wood. Once cured, we mounted using 4200 to seal it all up, inside and outside.
#59
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Joined: Nov 2020
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From: Grand Haven MI
Supports are good, I would add two more fasteners per side (mine has four stainless 3/8 bolts). This will prevent any potential rocking.
We used quarter-inch thick aluminum backing plates on the inside (platform came with all the hardware).
The platform was suspended via nylon webbing and moved into place. Once aligned, everything was cinched tight and then checked again. The holes were drilled using pilots that confirmed to the angle of the bolts holes coming through the mount. We removed the platform, finished the drilling, then used resin on the exposed wood. Once cured, we mounted using 4200 to seal it all up, inside and outside.
We used quarter-inch thick aluminum backing plates on the inside (platform came with all the hardware).
The platform was suspended via nylon webbing and moved into place. Once aligned, everything was cinched tight and then checked again. The holes were drilled using pilots that confirmed to the angle of the bolts holes coming through the mount. We removed the platform, finished the drilling, then used resin on the exposed wood. Once cured, we mounted using 4200 to seal it all up, inside and outside.
Thanks for the help TomZ!
#60
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Joined: Nov 2020
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From: Grand Haven MI
Thanks, It’s is coming together and nice to be nearing the home stretch with it. This new platform will look so much better and I lifted it myself.....a lot less weight hanging off the back. I think it will sound much better with the Corsa tips vs going through the platform.....even with the extra holes drilled and baffles out of the ST.



