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-   -   Cmi Headers/525 Efi Problems? (https://www.offshoreonly.com/forums/general-boating-discussion/185910-cmi-headers-525-efi-problems.html)

outriggers 03-24-2009 10:07 PM

LS, What did you do? Doug

SeaDated 03-25-2009 04:58 AM

Does anyone have pics of the suports and where can I get them?

lucky strike 03-25-2009 10:19 AM


Originally Posted by outriggers (Post 2828432)
LS, What did you do? Doug

Bought two new long blocks from Mercury & had headers repaired.
Leaked again. Rebuilt engines & bought 2 new sets of CMIs.
Should have never repaired them the 1st time.
CMI couldn't care less about my problems.

outriggers 03-25-2009 03:13 PM

I'm getting a set repaired now from a 525 with 49 hours on it. The engine is being rebuilt now and don't want to trash it. Who would have the best price on a new set? Does stellings make a set for the merc heads? Doug

ziggy 03-25-2009 03:18 PM

yes they do make headers for the 525's
http://www.monstermarinestore.com/pr...=1211&incat=59

Robertjr 03-25-2009 03:24 PM

What about the offerings from Hardin? didn't Young Performance just do a couple big motors using them?.................................robertjr

paul caswell 03-25-2009 03:29 PM


Originally Posted by RJ1340 (Post 2546795)
2005 Fountain with 160 hours. Water in 5 out of 8 inner header pipes. Scuttlebutt has it that this is not uncommon. CMI taking any responsibility for this?

This is a common problem w/ the old style CMI Headers. We have probably thrown away 30 plus set because of this problem. Look to see if you have the latest updated style.
Look for a space between the outer pipe and the cylinder head flange of about 3/4". The outer pipe is welded back to the inner pipe just short of the cylinder head flange. If the outer pipe is welded stright to the cylinder flange, (it's the old style), you can throw them away.

dreamer 03-25-2009 04:25 PM

is that the cool collar setup then?

outriggers 03-25-2009 05:38 PM


Originally Posted by paul caswell (Post 2828930)
This is a common problem w/ the old style CMI Headers. We have probably thrown away 30 plus set because of this problem. Look to see if you have the latest updated style.
Look for a space between the outer pipe and the cylinder head flange of about 3/4". The outer pipe is welded back to the inner pipe just short of the cylinder head flange. If the outer pipe is welded stright to the cylinder flange, (it's the old style), you can throw them away.

I haven't heard this. If I remember right the outer tube is welded to the flange. =junk ? When did they go to this new style? Boat is a 2005. Thanks, Doug

dreamer 03-25-2009 07:18 PM


Originally Posted by ziggy (Post 2828921)
yes they do make headers for the 525's
http://www.monstermarinestore.com/pr...=1211&incat=59

so all 525 boats must be 10k cheaper


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