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Cmi Headers/525 Efi Problems?

Old 03-24-2009, 10:07 PM
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LS, What did you do? Doug
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Old 03-25-2009, 04:58 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, 10:19 AM
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Originally Posted by outriggers
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, 03:13 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, 03:18 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, 03:24 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, 03:29 PM
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Originally Posted by RJ1340
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, 04:25 PM
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is that the cool collar setup then?
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Old 03-25-2009, 05:38 PM
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Originally Posted by paul caswell
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, 07:18 PM
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Originally Posted by ziggy
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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