there is a thread about it,lots of information,if you do a search you should be able to find it.

I had problems in 2002 with a set of the E-top style on a 500 EFI ... $hitty welds. When I posted that, a guy (owner at the time?) from CMI told me I was full of $hit. I think the post is still on here if you search. I posted photos of the leaks and it went silent - nothing as bad as those posted by PremierPower (WOW!!). I would recommend pressure testing anything with the letters CMI in it, based on my experience. Had a couple others that leaked at the header/tailpipe flange (header side of the joint) due to poor welds. I'm glad I don't have any, anymore.

I find it amazing that even after all the engines that have been destroyed by their poor craftsmanship they still demand such a premium price . I guess they hope the pretty shine will blind everyone . :lolhit: :angry-smiley-038:

Those were on our Formula (600s). All 4 were equally bad. Picture shows how bad it left the engines. 4/6 headers on the Donzi were that bad and 2 not quite as bad. But enough to ruin all 5 engines. Just bought all new Gen X. They had better last. Def going to be draining headers after flush. One guy told us to dry fire for 5-10 sec to make sure that if any water did get into engine it gets blown out but I worry about burning up water pump impellers.

Can you say Class Action ? That pic makes me sick in the stomach . Don't you think it's time somebody takes action ? :angry-smiley-038: Or we could just boycott their product which is already being done to an extent .

I think that was already discussed (tried ??) a couple of years ago ... there was quite a long thread about that and the OSO member who was an attorney was trying to get names and details, but, if I remember correctly ( I could be wrong on this), the thread got shut down for inappropriate use of this website or not being a paid advertiser, or something like that. Not sure what the outcome ever was.

I thought there may be a reason no one spoke those words . Money = Mute and the rats walk.......

Premier, one thing you might consider doing would be install full time drains to the distribution tubes - drain the water overboard through bulkhead fittings or if you have Bravos and the engines are out, you could put the drains through the exhaust block-off plate. This mod drops water pressure a bit and leaves your headers dry while the engine is not running - good for the engine (no drain back even with small cracks) and good for mitigating header corrosion. I have one set of Merc e-tops by CMI with the steel distribution tubes that is 11 years old, no issues yet. I do pressure check every year with air. 15 psi for 30 minutes; must have no drop in pressure.

What good substitutes are there? I love the fact that stainless marine has a 5 year warranty but they don't have the look that belongs with these engines IMO. Are there any other GOOD tubular styles similar to CMI that have had proven reliability?

Hardin Hurricanes . I've heard no nonsense about them yet . Check them out at Diamond or CP . Yes , they are definitely jewelry and a must have for me also .