removing silent thunder boxes
#11
21 and 42 footers
Platinum Member
Re: removing silent thunder boxes
Not much adhesive on mine....I removed it by myself fairly easily. It was rattling so maybe they forgot the caulk/adhesive????
The end of the swim platform has a lip that holds the box up. pry it down below that and the rest should be easy.
The end of the swim platform has a lip that holds the box up. pry it down below that and the rest should be easy.
#12
Registered
Join Date: Sep 2003
Location: Toledo, Ohio/Las Vegas, NV
Posts: 3,029
Likes: 0
Received 1 Like
on
1 Post
Re: removing silent thunder boxes
Hey guys, I have some nice 4" salisbury flappers for the through hull fittings will keep water from backing up the tailpipes. I went to GGB mufflers and 4 1/2" flappers, so if anyone can use these ...
#13
21 and 42 footers
Platinum Member
Re: removing silent thunder boxes
Originally Posted by RedDog382
Hey guys, I have some nice 4" salisbury flappers for the through hull fittings will keep water from backing up the tailpipes. I went to GGB mufflers and 4 1/2" flappers, so if anyone can use these ...
#14
Registered
Join Date: Oct 2000
Location: Sussex, WI
Posts: 543
Likes: 0
Received 0 Likes
on
0 Posts
Re: removing silent thunder boxes
Augie, I did the same on my 336, It's easier with two people, it's a pain in the a ss getting the back of the platform past the lip of the rubrail, but that's the way I did it, drop the back first and work the box from one end to the other. The second person helps with keeping the back of the silent thunder past the rub rail lip. The factory tips will be too short to clamp mufflers on, so you will need tips. Otherwise it will only be a matter of time before you get ticketed on Winnebago or Sturgeon Bay.
If you put tailpipes on all theway through the transom you will have to enlarge the holes to 4.5 inches, Factory holes are 4.125.
If you put tailpipes on all theway through the transom you will have to enlarge the holes to 4.5 inches, Factory holes are 4.125.
#15
VIP Member
VIP Member
Join Date: Mar 2001
Location: Vermont
Posts: 706
Likes: 0
Received 0 Likes
on
0 Posts
Re: removing silent thunder boxes
I also removed the silent thunder box on my 336. Make sure you tie a rope to the box and to the cleats on the boat. When the box lets go it is heavy and you don't want to crack it when it hits the ground. I installed HPI muffler tips that went in the existing 4" holes in the transom. I did need to drill for the thru-bolts as the stock tips were just screwed into the transom.
__________________
"All I need are some tasty waves, a cool buzz and I'm fine"
"All I need are some tasty waves, a cool buzz and I'm fine"
#16
Registered
Join Date: May 2004
Location: Phoenix, Az.
Posts: 97
Likes: 0
Received 0 Likes
on
0 Posts
Re: removing silent thunder boxes
[QUOTE=augie58]i used a closet pole as a pry bar inserting it in the rectangular rear openings
You wont get much leverage that way. You're putting the bar inside the box. You need to go between the swim platform and the box itself. I took mine off my 312 and just added rubber flappers. 2 full seasons and no problems. Mine was fairly easy to remove because two of the 4 brackets holding it in place broke while under way. I had to get under the boat in rough water and tie it up with an anchor rope to get in to shore!
You wont get much leverage that way. You're putting the bar inside the box. You need to go between the swim platform and the box itself. I took mine off my 312 and just added rubber flappers. 2 full seasons and no problems. Mine was fairly easy to remove because two of the 4 brackets holding it in place broke while under way. I had to get under the boat in rough water and tie it up with an anchor rope to get in to shore!
#17
Gold Member
Gold Member
Thread Starter
Join Date: Apr 2002
Location: wisconsin
Posts: 487
Likes: 0
Received 0 Likes
on
0 Posts
Re: removing silent thunder boxes
thanks guys
i fought with it three times by my self. Then friday night 2 budies came over with a case of beer and in just a couple of minutes it fell off.
thanks for the advice
i fought with it three times by my self. Then friday night 2 budies came over with a case of beer and in just a couple of minutes it fell off.
thanks for the advice
#18
21 and 42 footers
Platinum Member
Re: removing silent thunder boxes
Originally Posted by augie58
thanks guys
i fought with it three times by my self. Then friday night 2 budies came over with a case of beer and in just a couple of minutes it fell off.
thanks for the advice
i fought with it three times by my self. Then friday night 2 budies came over with a case of beer and in just a couple of minutes it fell off.
thanks for the advice
Thread
Thread Starter
Forum
Replies
Last Post
Rambunctious
Formula
22
08-15-2007 08:43 PM