Invertaflow muffler question |
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JPASS
Grand Poobah Joined: June-17-2013 Location: Orlando Status: Offline Points: 2283 |
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Posted: January-13-2015 at 11:01am |
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So I have to repair a few leaks in my invertaflow muffler. I have a question about a noise I am hearing when I move the muffler around. It sounds as if there is something inside that is moving. It doesn't sound like its moving around (loose) inside the muffler, but instead sounds like some sort of hinged baffle or something.
Is there some sort of hinged baffle inside or do I need to cut the end off to see what's doing? |
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'92 Correctcraft Ski Nautique
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8122pbrainard
Grand Poobah Joined: September-14-2006 Location: Three Lakes Wi. Status: Offline Points: 41040 |
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JP,
There's no hinged baffle. It sounds like a baffle is loose and still attached on one side creating the hinge effect. There are a couple great threads on the invertiflow repair. Take a look and it will give you a better idea of whats inside. |
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dwouncmd
Gold Member Joined: July-10-2009 Location: NC Status: Offline Points: 919 |
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I took mine apart and the banging was an extension of the outflow pipe that was no longer attached. The water has to fill the muffler to the level of the outlet (kind of like a bathtub overflow drain) before it can drain out, the exhaust has to bubble through the water. I glassed the extension back on the outflow, then fixed the leaks.
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89 SN
<a href="http://www.correctcraftfan.com/diaries/details.asp?ID=6567&sort=&pagenum=1" rel="nofollow">7 |
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JPASS
Grand Poobah Joined: June-17-2013 Location: Orlando Status: Offline Points: 2283 |
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So I have everything cut open and noticed the following:
Both outside caps of the muffler had the glass delaminated from the structure below them. The rattling I hear is this inner sleeve sliding up and down below the top hat looking thing on the top of the muffler. Is this supposed to slide up and down? I believe everything inside appears to be OK no? |
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'92 Correctcraft Ski Nautique
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Orlando76
Grand Poobah Joined: May-21-2013 Location: Mount Dora, FL Status: Offline Points: 3108 |
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How did you know you needed to make repairs? Did you notice something when you were doing riser gaskets? I'm trying to get an idea of what to look for.
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JPASS
Grand Poobah Joined: June-17-2013 Location: Orlando Status: Offline Points: 2283 |
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I noticed dry water streaks coming from both end caps and from the exiting downtube. The glass ends of the cap were soft to the touch. When I cut into it it appears the glass on the end caps came delaminated from the structure beneath it. That sliding baffle in the above pic is what I was asking about. Mine currently slides up and down inside that tube that encases it. I heard it rattling around as I was working on it. I have no idea if it's supposed to be in there loose or what. Just want to confirm it's function before I glass it back together. |
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'92 Correctcraft Ski Nautique
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8122pbrainard
Grand Poobah Joined: September-14-2006 Location: Three Lakes Wi. Status: Offline Points: 41040 |
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Was the Invertiflow made by CC or is it an aftermarket?
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Hollywood
Moderator Group Joined: February-04-2004 Location: Twin Lakes, WI Status: Offline Points: 13512 |
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Aftermarket, by Vernay, who was purchased by Centek.
Some confusing, poorly written Centek history, including a bit on the Invertaflow. |
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Gary S
Grand Poobah Joined: November-30-2006 Location: Illinois Status: Offline Points: 14096 |
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Not mentioned in the above is that Centex also bought out Marine Muffler Corp found in many boats
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Hollywood
Moderator Group Joined: February-04-2004 Location: Twin Lakes, WI Status: Offline Points: 13512 |
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phatsat67
Grand Poobah Joined: March-13-2006 Location: Indiana Status: Offline Points: 6149 |
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lol
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Gary S
Grand Poobah Joined: November-30-2006 Location: Illinois Status: Offline Points: 14096 |
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Hey I resemble that remark
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JPASS
Grand Poobah Joined: June-17-2013 Location: Orlando Status: Offline Points: 2283 |
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Soooooo no thoughts on the moving piece in the exhaust?
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'92 Correctcraft Ski Nautique
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Hollywood
Moderator Group Joined: February-04-2004 Location: Twin Lakes, WI Status: Offline Points: 13512 |
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I don't believe any fiberglass should be free to move around inside a muffler.
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JPASS
Grand Poobah Joined: June-17-2013 Location: Orlando Status: Offline Points: 2283 |
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I guess I'm just not seeing how to reattach this baffle piece. It doesn't appear to be broken free as there's no signs of broken or fresh glass on the part I can see. It almost appears as if it's meant to float up and down that tube it resides in. At this point I think I'm going to leave it as the exhaust was working fine aside from the small leaks. |
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'92 Correctcraft Ski Nautique
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dwouncmd
Gold Member Joined: July-10-2009 Location: NC Status: Offline Points: 919 |
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I was annoyed by the clunking around, and I had recurrent leaks the PO has done a very poor job of repairing, so I ended up taking the whole thing apart.
If I recall, it appeared to me that the inner piece was glassed in from the outside, and basically, it it had fallen apart. I took the outer single exhaust pipe off (the glass was delaminating so it pealed away pretty easily freeing the outer pipe). I cleaned everything up, fitted the inner pipe back into the outer pipe with epoxy on the inside of the outer pipe, then used glass and epoxy on the outside (the assembly was a slightly angled, and I think that is one of the reasons there are two pieces of pipe). I then put the rejoined piece back into the muffler and glassed the whole assembly in. I got the angles right so it all fit the way it was supposed to. |
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89 SN
<a href="http://www.correctcraftfan.com/diaries/details.asp?ID=6567&sort=&pagenum=1" rel="nofollow">7 |
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JPASS
Grand Poobah Joined: June-17-2013 Location: Orlando Status: Offline Points: 2283 |
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This is the help I was looking for. Thanks so much. So where did you cut the exit pipe? Did you cut it where it meets the muffler body or did you cut it a few inches down from the top? I have a small crack about 4-5" below where the exit pipe meets the body of the muffler. I can easily cut this all the way off and re-attach the floating pipe if you think I will be able to access it. Thanks again for your help. Any other tips would be greatly appreciated. |
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'92 Correctcraft Ski Nautique
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Hollywood
Moderator Group Joined: February-04-2004 Location: Twin Lakes, WI Status: Offline Points: 13512 |
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There seems to be sufficient reasoning to ditch the invertaflow and install downtubes and a Y. Seems to me there would even be room for an inline 4" muffler after the Y.
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JPASS
Grand Poobah Joined: June-17-2013 Location: Orlando Status: Offline Points: 2283 |
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I have everything I need to repair the muffler. Don't feel like dropping a few more hundies on new hoses and a Y pipe. |
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'92 Correctcraft Ski Nautique
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Air206
Grand Poobah Joined: September-28-2008 Location: Roanoke, VA Status: Offline Points: 3000 |
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I have an intact invertaflo at Zach's place if interested....... Somewhere around $100 or so plus shipping. (Maybe some "hoser" is passing through INDY to FLA for SJRR.............)
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8122pbrainard
Grand Poobah Joined: September-14-2006 Location: Three Lakes Wi. Status: Offline Points: 41040 |
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Considering how many people have problems with the Invertiflo's, I certainly can say their construction is pathetic.
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81nautique
Grand Poobah Joined: September-03-2005 Location: Big Rock, Il Status: Offline Points: 5772 |
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Geez Pete, there's always room for improvement but these things are about 20 years old. Not a terrible track record really. |
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Air206
Grand Poobah Joined: September-28-2008 Location: Roanoke, VA Status: Offline Points: 3000 |
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Alan, Pete was being kind.
If really disappointed he would say "Hack Job".... pathetic ain't nothin..... |
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8122pbrainard
Grand Poobah Joined: September-14-2006 Location: Three Lakes Wi. Status: Offline Points: 41040 |
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Alan, I was basing my comment on the construction and not the age. The thin walls and little or no reinforcement on corners or joints. The glass hulls are past 20 and they are still good. BTW, I'm past 20 and slowing down but not falling apart! |
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81nautique
Grand Poobah Joined: September-03-2005 Location: Big Rock, Il Status: Offline Points: 5772 |
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You have your engineering blinders on again. I'm just saying how many 1000's of these things did CC put in their boats in the 90's? Of course there are going to be some failures but when the majority are still in service after 20 years and 1000-2000 hours of use that doesn't seem to deserve the "pathetic" grade. YES anything can be scrutinized after 20 years of use and be redesigned to last longer/perform better but that doesn't make the first edition a failure. |
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dwouncmd
Gold Member Joined: July-10-2009 Location: NC Status: Offline Points: 919 |
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I didn't cut mine. The larger outside exhaust pipe is stuck in through a hole in the side of the main muffler, then glassed in. I worked my way around the glassed-in joint, delaminating the joint one layer at a time until the pipe was free. The problem I see with cutting it is that you would lose the extra length that projects into the muffler and allows connection to the smaller inner pipe and the glassed in joint to the muffler.
One caveat to replacing the muffler with an unknown model invertaflow, they can be slightly different in terms of connection spacing, pipe size and angle to manifold, as well as lateral position and angle of the down pipe. They are not universal (I have one donated to me that does not fit in my boat, which I am hoping to donate in turn to someone at a reunion one day). The y pipe conversion is an option, but repairing the one you have is probably a whole lot less expensive, and as a bonus you get to figure how it is put together and how it works. |
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89 SN
<a href="http://www.correctcraftfan.com/diaries/details.asp?ID=6567&sort=&pagenum=1" rel="nofollow">7 |
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JPASS
Grand Poobah Joined: June-17-2013 Location: Orlando Status: Offline Points: 2283 |
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I'm not sure I follow? Here's a video of whats going on in there. It almost looks as if I should slide the loose pipe up into that weird chamber and apply some epoxy to the end and then let it seat itself and call it a day. I don't see an easy way to fix this floating pipe. |
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'92 Correctcraft Ski Nautique
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8122pbrainard
Grand Poobah Joined: September-14-2006 Location: Three Lakes Wi. Status: Offline Points: 41040 |
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Alan, I stand corrected. It's easy to criticize when I see many failures without thinking the complete situation through and I apologize for that. |
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dwouncmd
Gold Member Joined: July-10-2009 Location: NC Status: Offline Points: 919 |
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I believe the small floating pipe seats down into the down pipe. I think the chamber above is an outer baffle for the exhaust (the exhaust has to flow through the water and into up into the chamber; when the smaller pipe was seated in the down pipe the water level must be as deep as the smaller pipe protrudes up into the baffle, the water and exhaust have to flow up into the chamber and out the smaller pipe into the down pipe). I don't think mine ever had that chamber, just the smaller pipe seated in the down pipe. My 89 was the first year for invertaflow; I think your muffler is a slightly newer design. I think you could just expoy the smaller pipe back into the down pipe, but looks like it might be tough in the small space you have to work in.
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89 SN
<a href="http://www.correctcraftfan.com/diaries/details.asp?ID=6567&sort=&pagenum=1" rel="nofollow">7 |
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JPASS
Grand Poobah Joined: June-17-2013 Location: Orlando Status: Offline Points: 2283 |
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My understanding of how this works is this:
That floating pipe actually acts like an elevated spillway in that the exhaust doesn't start dumping water until the height of the water in the muffler reaches the top of the loose pipe. Then the water will then flow out the exhaust. I'm assuming this also helps to create a certain amount of back pressure? Would not having this spillway effect anything in regards to the way the motor runs or performs? Wonder if it lead to any of the leaks due to an improper water level in the exhaust? Or maybe it's just too early and I'm talking outta my a$$ |
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'92 Correctcraft Ski Nautique
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