Exhaust Mufflers
 

Can anyone suggest something that might work to get the noise level below 90db's... Are there any mufflers that work well for this?

I have Merc 525's with whipple chargers through what I believe are Stelling Exhausts...

Down at LOTO here they are cracking down on anything thats louder than 90 db and right now I'm at 96.5 db and don't feel like getting a ticked everytime I head out..

Thanks...

GGB
They brought my 1100s to 94.7

5 inch IMCO Gattlins got me 90db's with my Merc 700's

who makes the ggb's now

Thanks for the suggestions, I'll have to do something cause I wouldn't want to run the motors at any RPM with the Silent Choice which brings me to one other item.

How hard is it to replace the flappers in the Silent Choice exhaust? I worked over the pneumatic pistons, it looked like they hadn't been used in quite awhile.

I finally got them all to operate , but didn't think twice to look in the ends to see if any of them were still their... LOL....

Presently only one of the four are still around and I'm not sure how difficult or what the procedure would be to replace them. If anyone has some experience or suggestions I'd be interested in hearing them.

Thanks,

Jim

I have Livorsi E-series on my 525's and the do an awesome job!

What do you guys think of the Donkey hang downs vs the Livorsi, GGB, or Imco silent choice. Are the Donkey's quieter at the docks cause they are under water, anyone have any idea what the decible's are of the 525-700 Mercs when running on plane. Thanks Jeff

It looks like the Gibson's just slip into the end of the tailpipe, how do they attach to the existing tailpiece?

Is it through a securing bolt or other attachment of some kind?

Sorry for all of the questions, but if I don't have to do a ton of modifications and is fairly straight forward that would be the best option..

Jeff,
On ours I have tested a few and ended up with the downturns.
No muffler - 113db
GGB - 94 to 95db
CMI old version - 98db
CMI new version - 94-95db
Downturn - 88db

On your new one I would have them put in the silent exhaust. It is a much cleaner look on the transom.

Rick

I like the silent exhaust, but always seem to have a selinoid problem, hopefully they have gotten better. Actually which one's have the least amount of problems, Thanks Jeff