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Cmi Headers/525 Efi Problems?

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Old 03-25-2009, 05:58 AM
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Does anyone have pics of the suports and where can I get them?
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Old 03-25-2009, 11:19 AM
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Quote:
Originally Posted by outriggers View Post
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.
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Old 03-25-2009, 04:13 PM
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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
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Old 03-25-2009, 04:18 PM
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yes they do make headers for the 525's
http://www.monstermarinestore.com/pr...=1211&incat=59
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Old 03-25-2009, 04:24 PM
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What about the offerings from Hardin? didn't Young Performance just do a couple big motors using them?.................................robertjr
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Old 03-25-2009, 04:29 PM
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Originally Posted by RJ1340 View Post
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.
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Old 03-25-2009, 05:25 PM
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is that the cool collar setup then?
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Old 03-25-2009, 06:38 PM
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Quote:
Originally Posted by paul caswell View Post
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
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Old 03-25-2009, 08:18 PM
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Originally Posted by ziggy View Post
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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Old 03-26-2009, 01:39 AM
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Here is my solution to the CMI leaking problems....Stellings! I decided to go with Stellings simply because I have had them on other boats without any problems. I got this current boat in April and ran it this past season with the CMI headers all the while keeping my fingers crossed and constantly draining them as a precaution. I didn't have any problems with the CMIs, but I didn't want to keep using them due to their track record.

This past fall I ordered a set of Stellings headers and tailpipes from Benfield's (Stellings dealer) to replace the CMIs. We have just started the install, but we have not finished it yet. We got all of the old stuff removed and the new headers on before it started raining, but we still need to install the new tailpipes. I'll post some pictures when it is finished.
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Cmi Headers/525 Efi Problems?-100_1555.jpg   Cmi Headers/525 Efi Problems?-100_1557.jpg   Cmi Headers/525 Efi Problems?-100_1558.jpg  

Cmi Headers/525 Efi Problems?-1120081555.jpg   Cmi Headers/525 Efi Problems?-100_1559.jpg  
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