Offshoreonly.com - 525 headers

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LostinBoston

12-03-2007 10:52 AM

525 headers

Who, besides CMI, makes stright back headers for the merc 525???

Biggus

12-03-2007 12:09 PM

Stellings makes a replacement for the 525 Merc

Panther

12-03-2007 01:57 PM

Here's a suggestion....it ought to get the header guys going.....
http://www.stainlessmarine.com/bigblock3.html

raytart

12-03-2007 05:14 PM

1 Attachment(s)

stellings

Biggus

12-03-2007 07:08 PM

Quote:

Originally Posted by Panther (Post 2357524)

Here's a suggestion....it ought to get the header guys going.....
http://www.stainlessmarine.com/bigblock3.html

SM does make great exhaust but do they actually make a replacement for the odd bolt pattern 525 ?

Panther

12-03-2007 07:16 PM

Quote:

Originally Posted by Biggus (Post 2357966)

SM does make great exhaust but do they actually make a replacement for the odd bolt pattern 525 ?

I'm not sure but being aluminum I bet the head can be drilled/tapped, I'd have to check.

Lofty

12-03-2007 08:39 PM

Stellings makes by far the nicest headers.

LostinBoston

12-03-2007 09:59 PM

Is the Stelling big tube straight back suitable for a 525 or is the port sizing off? The 525 headers are not stright back.
http://www.trickmarine.net/images/pr...ingsblack1.jpg

Dean Ferry

12-04-2007 06:21 AM

Quote:

Originally Posted by Panther (Post 2357524)

Here's a suggestion....it ought to get the header guys going.....
http://www.stainlessmarine.com/bigblock3.html

I personally think that is one of the best exhaust systems out there, besides KE's exhaust. If you boat in saltwater, they are the way to go, IMHO.
Dean

LostinBoston

12-09-2007 05:28 PM

BUMP
Has anyone actually replaced their CMI's on their 525's?

Panther

12-09-2007 05:55 PM

Quote:

Originally Posted by LostinBoston (Post 2365345)

BUMP
Has anyone actually replaced their CMI's on their 525's?

Owner of our Marina has an Epoxy 42OL. triple 525's.... He replaced his headers this past spring. Unfortunately they didn't pressure test the headers before winterizing the engine last year and subsequently had to replace the valve springs and do a full valve job on the heads.

LostinBoston

12-09-2007 08:54 PM

Quote:

Originally Posted by Panther (Post 2365366)

What did he replace them with? Was he able to find a direct replacement that fit his tailpipes or did he need to get a new custom exhaust system.

Panther

12-10-2007 08:00 AM

Quote:

Originally Posted by LostinBoston (Post 2365573)

What did he replace them with? Was he able to find a direct replacement that fit his tailpipes or did he need to get a new custom exhaust system.

He wound up just replacing them.... I think 1 out of 3 or two out ot the three sets went bad...

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