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Old 01-06-2008, 08:47 AM
  #21
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I have installed a few sets of the Sport tubes on customers boats in the last few years and even bought 2 sets for my new motors ( not yet installed in boat). Now I am having second thoughts and I am considering going with Stellings and Ebaying the CMI's.
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Old 01-06-2008, 08:56 AM
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I've had the same set of CMI E-Tops since 2001, fresh water only, no issues.

Not sure if it helps but I do drain them if the boat is going to sit for any length of time and drain while trailering.
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Old 01-06-2008, 09:14 AM
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Pantera,
These are the Mercury version of the Sport tubes not the CMI's does that make a difference.
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Old 01-06-2008, 07:28 PM
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from what i have heard some of the triple eng. setups were not supported properly causing problems on the 525's. My cmi's on my 500efi's are 2000 models, Leon did a repower on it a few years ago and i have not had any problems, i pull both sets over the winter and pressure test with air, so far no leaks, pulling them off in a week to check before season starts, i hope my luck holds
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Old 01-15-2008, 10:13 AM
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what about 575s?

what kind of headers and what kind of problems?
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Old 01-15-2008, 12:51 PM
  #26
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I wonder if the grade of Stainless Steel CMI is using is not as good of a grade that the others are using,being there corroding/rusting causing leaking???

That would explain why the salt water boats are failing more than fresh water
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Old 01-15-2008, 02:30 PM
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Quote:
Originally Posted by Strip Poker 388 View Post
I wonder if the grade of Stainless Steel CMI is using is not as good of a grade that the others are using,being there corroding/rusting causing leaking???

That would explain why the salt water boats are failing more than fresh water
I think my Dad can answer that. He has been through the 525 headers and the CMI E-top and I think has suggested to CMI on the correct material to use, but I will double check. His shop in an aerospace one so they know what to use that will make it last.
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Old 01-15-2008, 10:41 PM
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Originally Posted by fountain40icbm View Post
I think my Dad can answer that. He has been through the 525 headers and the CMI E-top and I think has suggested to CMI on the correct material to use, but I will double check. His shop in an aerospace one so they know what to use that will make it last.

not sure on the grade but I seen some stainless rust, Maybe the higher grade stainless might not hold up to heat or get brittle and crack?
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