merc custom exhaust for standard midsections

**1BadAction** · 06-21-2004, 04:56 PM

GREAT thread TTT for the people that havent seen this!

**eli** · 06-21-2004, 08:55 PM

mine are already drilled from the factory 5, 1/2 in holes on each side the motors are obnoxious at cruising speed you can hear them for miles yet register 84 db at idle. your method sounds great but i'm not going to cut pieces off the mid. cool job tho.

**kubelwagonman** · 06-21-2004, 09:29 PM

on my ole 200 i cut the ENTIRE exh out of the lower,it was awesome souding but the lake patrol didnt think so,so when i knew or saw them on the lake i would idle over to the beach and pull out the trusty pieces aluminum i had ball peeed to fit the angle of the lower unit with a screw and wingnut(nylock) and just QUICKLY install them and whalla,no more noise,cheap set that cost bout 1.00.......than when they went back wherever they cane from tilt the moter up and pull it back off .....bythe way i,m talikn exh cavity area on the lower unit only

**Talon2.5** · 06-22-2004, 11:49 AM

wow, posted this 2 years ago roughly, sure feels longer than that

**SHEP358** · 07-19-2004, 02:08 PM

I AM NEW TO THE BOARD
I HAVE A 1998 MERC 3.0L 200 HP
IM LOOKING AT THE POST WOULDN'T ONE JUST BE ABLE TO DRILL SOM 1/2 " HOLES UP FROM THE BOTTOM AND CALL IT GOOD FOR A LITTLE LOUDER EXHAUST TONE. LIKE SOME OF THE ONES THAT DID IT FROM BEHIND. IT WOULD BE LESS NOTICEABLE FROM UNDER NEITH AT IDLE AND LOUD ON PLANE
CORRECT?? DOES THIS HELP OR HINDER PERFORMANCE AT ALL?

**jrumon** · 07-19-2004, 09:40 PM

Sorry, you can't drill up from the bottom without drilling thru the cav plate too (not a good idea)... plus, you need to remove the inter liner (can) so that the newly drilled exhaust holes have a purpose! A good time to install solid mounts as well...

To take advantage of the relived exhaust mod, you need to do other perf. work (heads milled, velocity stacks, reeds, rejetting, etc.) to gain any noticable horsepower or RPM... otherwise it's just noise. Jim.

**150aintenuff** · 11-07-2005, 02:20 AM

Back To The Top... Been A While

**WSJR1** · 03-28-2006, 02:17 PM

BUMP So I can find it...

**The Bilge Idiot** · 06-23-2006, 07:50 PM

I'm going to need this tomorrow, so I'm bringing it to the surface

I would like to express my thanks to Talon2.5 for the great step by step, complete with photos even!
YOU THE MAN!!

**wrechin2** · 06-25-2006, 09:45 AM

Talon,
Did that to mine. SOUNDS SO SWEET! Thanks!!!

**The Bilge Idiot** · 06-29-2006, 12:19 PM

ttttt

**1BadAction** · 06-29-2006, 02:42 PM

Skip, been 4 years now, is that long enough?

IMHO, this sounds just as good if not better than the OS dump. Ive done it to two motors so far.

**ShorePounder** · 06-29-2006, 08:06 PM

It's louder than an offshore dump, that's for sure. Just ask the author of this thread.

Side by side, his 2.5 offshore dump, next to my 2.4 with the mid seen here in this thread. He could here mine over his.

**1BadAction** · 06-29-2006, 09:05 PM

i think from behind the OSD is louder, but from the front possibly the modded one. maybe due to the way the exhaust echos down off the water? also, the pitch of the OSD is deeper, making it not sound as loud. both sound badass though.