Silent Thunder rattle?
 

What is up with the rattle of the platform. It acutally vibrates the back seat a little bit. I like the looks and sound of the silent thunder, just not the vibration.
Can this be fixed or cured without removing the silent thunder?

Re: Silent Thunder rattle?
 

Chris .. the baffles have been known to come loose ... I dont think you can repair them without taking the box off .... Some have gone in thru the rear outlets and cut a dog house type opening in the baffles ... like upside down "U" ... there are two baffles on each outlet... just a partition in the box ... one from the top ending about 4" from the Bottom and one from the bottom ending 4" from the Top .... the exhaust has to ~ to get out ...mine was broke loose on the Baffle closest to the transom. My Glass guy used a putty to repair it .. worked well ... Since then I have removed the box again and cut out ALL the partition, but have not run it yet. m

Re: Silent Thunder rattle?
 

Mine rattles too. It is loose where the top and bottom are joined together (behind the rubrail). Had to put a couple of screws in to help quiet it it down. Others have said it's due to the baffles coming loose inside the platform. I took mine out and it still rattled. Seems the only sure way to get rid of the rattle is to remove the platform completely :( .

Re: Silent Thunder rattle?
 

And it looks so much better without the platform!
http://www.mattyorke.co.uk/albums/album08/1_G.jpg
http://www.mattyorke.co.uk/albums/al...formulator.jpg

Re: Silent Thunder rattle?
 

yes it does, Im looking to get the tube type

Re: Silent Thunder rattle?
 

Looks very nice fixing the platform can be a challange :D

Re: Silent Thunder rattle?
 

A little glass and some stainlesswww.putfile.com/masi242

Re: Silent Thunder rattle?
 

What year boat is your silent thunder on? The older ones pre 1990 are more of a pain to repair then the newer ones.

Re: Silent Thunder rattle?
 

Mine is a 1991. Will the boat sound much different if I remove the baffles?

Re: Silent Thunder rattle?
 

Yes, It will sound better, I did this on my 272 sr1 and it gave it a nice rumble, you can do asearch on silent thunder and find the thread that tells you how to do it, I did mine by drilling 3 holes in the top 2 corners and the middle top of the baffle, and then used a keyhole saw, to cut across and then down to cut them out, it is easier to get the piece out by cutting it in half to get it back out thru your exhaust opening, Some people have also used a sawzall, but i found it easier with the keyhole saw, mine had a 12" blade.

Re: Silent Thunder rattle?
 

I got an Air Saw from Harbor Freight .. works nice ...

Re: Silent Thunder rattle?
 

I have the 4 drain plugs out and the baffles have 5 holes each cut in them.

SHOULD I PUT THE 4 PLUGS IN THE BOTTOM OF THE PLATFORM BACK IN?

Re: Silent Thunder rattle?
 

Chris .. it would be more quiet with the plugs in ... I have never known anyone to run with them in ...The rattle can be delt with ....

Re: Silent Thunder rattle?
 

I would put the plugs back in and remove the rest of the baffles

Re: Silent Thunder rattle?
 

my only problem with that is you then build up water in the box ....how much I'm not sure .....but its more weight and more important is that box of water ending up back in the motor ...

Re: Silent Thunder rattle?
 

No not at all, You actually get less water with the baffles removed, You dont have the waterfall effect, Those baffles go almost all the way to the bottom of the platform, They act like a dam, when removed the water flows out freely and the box actually drains faster while underway.

With the plugs out and not having any water in there can create quite a bit of heat in the box and create fiberglass problems along with melting the flaps that are on the transom tips.

I found on my 272 that i had much better flow with no baffles and removed the flaps on the square openings in the back of the silent thunder box.

Re: Silent Thunder rattle?
 

Hey guys,
Learned a hard lesson about the rubber flaps and removing them. My 1987 F206 was the first year with the silent thunder platform. The factory did NOT put on the square flaps on the back of the platform that year. There are actually round rubber baffles on regular transom tips inside the platform but the cannot be seen unless the platform is off the boat. You can also not see if the round rubber flappers break and fall off! In 1988 Formula put the second set of flaps on the back of the platform for a reason. About 6 years in, unbenownst to me, one of the round flappers broke off and apparently exited the platform. One day at the local sand bar someone pushed my boat backwards to get me out of the raft of boats and out into deep water to leave. Instant hydrolock of the engine. Bent two rods, collapsed an exhaust valve into the head, and cracked a piston. The purpose of those square flaps on the back of the platform is to help prevent hydrolock. There is negligible backpressure if any to the exhaust system. I'd leave any flappers ON! Drill bigger holes in the bottom of the platform to relieve backpressure. :eek: