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CMI Problem Help!
I have just discovered a leak on one of my CMIs.. The leak is located on the top of the riser where it connects to the tail pipe? The connection has unique looking clamp with two nuts on it . (rusted together because of the leak.) The pipes have about 160 hours on them with the first half of that in fresh water. It does not leak at idle, only at high rpms..
Is this an easy fix?? What di I need to do? Should I fix it right away or can I still run it wait a month and fix it when I recoup some cash. I have just dumped a ****load of money into this boat and now this :( :( THANKS FOR THE HELP :drink: :drink: |
Re: CMI Problem Help!
bad news for CMI leaking that soon
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Re: CMI Problem Help!
I would send it back to C.M.I. to have them repair it. Call and talk to Randy. Are you sure you are not reverting water up from the tailpipe? I would NOT take a chance on destroying a motor ... it can get very expensive very fast!
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Re: CMI Problem Help!
The engine is a 2000 HP500 EFI. The CMIs the original stock exhaust. It is just the one side, the other side looks new. The only corrosion I can see is on the clamp assembly...
As far as water reversion.. Wouldn't that be a low rpm problem? Also I thought Mercury had solved this problem with this years 500EFI and CMI combo? |
Re: CMI Problem Help!
Originally Posted by dowhat
As far as water reversion.. Wouldn't that be a low rpm problem? Also I thought Mercury had solved this problem with this years 500EFI and CMI combo?
What is the configuration of the tailpipes (silent choice, wet, dry, etc.)? What kind of boat is this in? Can you post a pic showing the problem area? |
Re: CMI Problem Help!
Am I reading this different. Between the header & the tailpipe there is a gasket that goes there. I know when my gasket let loose I had a dripping from there. Also only at RPM. The solution is call CMI & order some new tailpipe gaskets & install 2 at that location. Since you are saying the clamp is rusted up you might need a new one to get it all back together. By the way CMI is very proud of these gaskets.
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Re: CMI Problem Help!
does anyone @ CMI belong to the site??
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Re: CMI Problem Help!
Here is a link to their site. I also copied their list of distributers. I ordered my gaskets from Teague.
http://www.custommarine.com/ Doller Offshore Ft. Lauderdale, FL Tel: 954-463-9988 Fax: 954-463-4993 www.dolleroffshore.com Teague Custom Marine Valencia, CA Tel: 661-295-7000 Fax: 661-295-7007 Rex Marine Corp. La Verne, CA Tel: 909-392-7300 Fax: 909-392-3722 www.rex-marine.com T-N-T Custom Rigging N. Miami Beach, FL Tel: 305-944-2118 Fax: 305-944-1106 Innovation Marine Corp. Sarasota, FL Tel: 941-756-4337 Fax: 941-751-5398 Kurts Marine Brick, NJ Tel: 732-477-7400 Fax: 732-477-8378 aol.com/kurtmarine/ Pacific Power Boats Portland, OR Tel: 503-288-9350 Fax: 503-288-3525 Highport Marina, Inc. Pottsboro, TX Tel: 903-786-2966 Fax: 903-786-6299 www.loeshighport.com Marine Supply Inc. Marine on St. Croix, MN Tel: 651-433-5046 Fax: 651-433-5457 Performance Marine Dockside Deerfield Beach, FL Tel: 800-970-RACE Fax: 954-970-4099 www.outdrives.com Dick Simon Marine 25802 Victoria Blvd. Dana Point, CA 92624 Tel: 800-829-2628 Fax: 949-240-2218 www.dicksimon.com Sterling Performance 54420 Pontiac Trail Milford, MI 48381 Tel: 248-684-5040 Fax: 248-684-0080 Hot Knots RR #1 Foresthome Ind. Pk Orihhia, Ontario L3V-6H1 Tel: 705-327-9741 Fax: 705-327-7036 www.hotknots.com Grimes Automotive 215 Tidwell Dr. Alpharetta, GA 30004 Tel: 770-475-5272 Fax: 770-667 |
Re: CMI Problem Help!
You need to find out if the header is actually cracked at the collector. This is where they will crack. It sounds like you just have water reverting back and dripping out at the flex flare collar. This is not uncommon from what I see. A lot of boat manufacturers try to save a little money when they have tails made and only have one bend put in the tail piece. Then from there at the rubber boot joint at the exhaust tip they force on the rubber. Then with time and vibration the rubber is pulling down on the exhaust tail and it makes the header and tail not match up very well then you get a leak. If the header is not cracked the water is from how it exits the tail and hits the rubber boot at the tip. Also if you have exhaust flappers they will keep the water from fully exiting and it will come back and leak out the header-tail connection. A quick way to check your header is run the water hose from the header that goes to the tail overboard and bypass the tailpiece. If you do this at an idle for a short period you will know immediatly if the header is cracked. Or just call PowerboatNW 253-627-4600. (Cameron) We have done just about every CMI configuration.
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Re: CMI Problem Help!
THANKS! For all the info!
I think I am going to order a new gasket and clamp assembly for that side.. Has anyone installed one of these? Or had problems with this installation? I would like to do this myself to save a few bucks!! |
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