Invertaflow Muffler on ’94 Sport Nautique

Foot_Fungus is giving wise advice. I can testify that after the repair that I posted above in February 2007, I am now in my 6th hard season of skiing/barefooting with my repaired invertaflow with NO PROBLEMS! repairing the fiberglass is the way to go.

Update - the kit from mycorrectcraftparts is $471 plus shipping.

I guess this would rust out quick? Wasn't sure since it was "aluminized":
http://www.jegs.com/i/Flowmaster/389/Y300400/10002/-1?parentProductId=744773

Leaning toward just modifying / repairing the Invertaflo as suggested. So to get rid of the muffling just cut the tube off inside the "barrel"? My other issue is that the inlets look restrictive. Almost conical shaped. I'd like to cut those off and do-over. Guess I'd need something slightly smaller in diameter than the hose that connects to the manifolds. Thoughts/ideas?

Foot_Fungus wrote: the way the invertaflow works is its a tube over tube setup. so it forces the exhaust gas through a few inches of water to get to the bottom opening of the outter tube, then up to get to the opening of the inner tube. My plan is to remove both tubes and or remove a few inches of the outter tube so the exhaust doesn't have to pass through as much water, but i still keep some of the noise baffling characteristics... I'm gonna tear mine apart in November.

Update?

Yours is the second muffler I' ve herd of where a back fire caused that cap to blow off .
The first was mine, My exhaust flap had fallen off and a muskrat made nest condo in the tube which caused the backfire       when it happened the engine cover was up and that cap blew up into a million peices and hit one of the passengers in the shoulder I baught a new one at the time. I wish i kept the old one .

I'm in the process of repairing my invertaflow. In my thread Air206 mentioned he had one for sale. I'd hit him up.

I ended up buying a Y pipe and some hose from skidim for about $150 (total) and it was great. (eliminated the Invertaflow)

Tom

JPASS wrote: tapenick wrote: I ended up buying a Y pipe and some hose from skidim for about $150 (total) and it was great. (eliminated the Invertaflow)Tom You must have got some killer deal. The exhaust hose alone would cost that with shipping.

Could be off... been a year or two. Thinking harder, seems like the Y was close to $100 I think it took 7' of 3" flex. Ugh, yeah that would be ~ $140. Maybe it was $250. :)    I do recall that shipping was nowhere near as bad as I thought it would be. Anyway, call Richard at skidim and he can walk ya through it. Or reply back and I can answer any questions.

Erikgundy98 wrote: To all you who did the repairs on your inverta-flo, did you have to recreate the top bubble or cap above the baffle? How did you do that?

Thankfully when my Invertaflow failed it was just the baffle that came loose. But I understand your situation where you need to make a "bubble" top. Considering how much a new muffler costs and how much they cost to ship it would probably be worthwhile to make a "bubble" cap yourself. I happen to have epoxy, woven fiberglass and glass matt already, so I would definitely fabricate a part. I used a contour gauge on my existing "bubble" cap. From there it would be easy to make a mold. I would go simple and either use some old surfboard foam (I have lots of) or modeling clay. My contour gauge outline is from the outside. So if you wanted to make a plug it would require drawing the outline reduced by the thickness of the part you are shooting for. If you wanted to make a mold (concave) the outline would work fine. If you used modeling clay it would be easy to cut the outline into a sheet of plastic and use it to shape the clay after roughly approximating the shaped clay. In reality the "bubble" is not a critically designed or manufactured piece. So it isn't crucial to have a precise piece made. I wouldn't coat and cover the mold with release. I would just cover it in thin plastic sheet. A fold here or there or an overlapped seam isn't going to be an issue in a molded part like this. You just want to deflect the water flow around the baffle rather than have it splash in mostly one direction. A layer of woven glass, a layer of matt and another layer of glass and some spray paint will give you a cap that will epoxy right back on. I would definitely lap the seam from the "bubble" to the muffler body with some woven glass :) Non reinforced epoxy is not that strong. Have fun with epoxy out there. It's easy to do. The image below is not to 

But...  :)  That is why I refer to the "bubble" in quotes. Doesn't look like a bubble. 

nobrainsd wrote: There is an invertaflow muffler for sale on ebay right now. $29 and $125 postage. Looks like it needs repair on the exhaust port, but the bubble and body appear to be intact. marine exhaust muffler Invertaflo Correct Craft Nautique | eBay

If you put a San Diego zip code (where nobrainsd is located) in the EBAY shipping estimator it comes out to 125 and some change. (USPS Priority Mail)

Strange. I did not enter my zip code in the shipping calculator to get the postage amount. The listing came up with Expedited Postage $125. Now I see the listing shows Calculate. EBay at it's best! But I will definitely stay aware that when considering items on E Bay that the postage isn't necessarily what is shown! 

Riley wrote:   It has been repaired, which looks like it is coming undone, but it did not appear to leak when we ran the boat we removed it from,