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Please help! I have a Atomic 4 that I found to have an exhaust leak. I removed the exhaust and it seems to be fabricated out of galvanized steal. Super rusted through as well. The exhaust goes to one part of the muffler and the water line goes to another part of the muffler. I wish to put a 1 1/4 in 45º water injected elbow and replace the muffler with a modern one. Price is a bit of an issue so I am trying to see if anyone has any suggestions as to on-line merchants that would carry water injected elbows. Acutally any lists of websites that are the "Walmarts" of the marine industry. I am new to sailing and just moved into my boat. Any help is much appreciated!

Thanks
 

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moyer marine sells parts for the A4. Don Moyer is a specialist on the engine and has a great website. There are probably some marine engine shops in SD that cater to the A4, but I don't know any off hand.
 

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I totally agree that Moyer Marine is your best online resource (next to CardiacPaul) on A4 engines and their systems.
You can get most of the parts Moyer sells at a good auto parts store for a little less but you can't get everything they sell from one place.
Since it seems you will be replacing your water lift muffler I recommend you replace all your exhaust hose at the same time. You can find the correct exhaust hose at Defender and they may even sell it here at the sailnet store.
There is also Torreson marine but they are more diesel specialists.
BTW, there is a forum specifically for the A4 under the Gear & Maintenance section. I suggest you find the Moyer Marine forums and register/post there as well (yes, it is free).
 

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Not sure about the A4, but the exhaust loop on my Universal 5411 diesel is made up of standard 1 1/4 NPT pipe fittings (elbows, nipples, etc.). I recently replaced mine with black iron fittings from Home Depot.
 

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The elbow is a standard fitting that you can buy at any plumbing supply house. I replaced the one on my old Pearson 30 at Home Depot. They come with the small port. Bring the old one to be sure you get the right size for the small fitting. Be sure to buy black iron. Galvanized won't last.

Dick Pluta
AEGEA
Nassau, Bahamas
 

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There's some eplanation for the above pics which I'd be happy to entertain. The boat is my Ericson 35 II, 1972.
HK
Berkeley
 

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Be careful to follow key principles when replacing an A4 exhaust system, noting the waterline, height of exhaust components above the waterline, and risk of back-flooding the A4 cylinders through the manifold.
http://www.abycinc.org/committees/P-01.pdf
Good Old Boat: Cool and Quiet and Trouble Free by Jerry Powlas and Dave Gerr
Exhaust Risers - Marine Engines : Boats and Yachts Maintenance, Repairs and Troubleshooting :
EXHAUST INSTALLATION

Not all installation ideas pertain to all A4s in all sailboat designs.
 

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Starboard side access can be problematic but less so than before the 'operation'.
The pics were labled so I could find them conveniently in my photo library and may have been misleading. What I wanted to show was the install of the water cooled elbow. Floatsome's advice is well taken. The only mishap I ever had with the design was filling the crankcase with water when the engine failed to start but I continued to crank anyway, and the water pump simply continued to pump too, and it was a mess. Now I don't open the water intake valve until the engine is running. Has been working well for 25 yrs or so.
Howard Keiper
 

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Discussion Starter #13
THANKS ALL!!! Moyer Marine is exactly the store I was looking for. I am going to replace the whole exhaust and for super cheep compared to what I had originally thought it was going to cost. This website is invaluable. Moyer Marine has just the stuff I'm looking for at reasonable prices. I really appreciate everyone's help. My only question is if I use their water injection that injects the water below the exhaust, is there any risk of it sucking back into the exhaust manifold? I'm pretty sure the awnser is no, but any insight is welcome. Thanks again all who replied!

Ben
 

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Ben, any coolant injection point, regardless of the way it is made (I have a Moyer inline coolant injection fitting that I am about to install in our rebuilt exhaust elbow using galvanized pipe), has to be far enough over the top and on the downside of the elbow to reduce the risk of coolant water backfilling the manifold. The links I provide above discuss the design principles, then the owner has to ensure the design meets the principles. Checking with owners of the same boat whose exhausts are working fine helps too.
 
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