5411 Exhaust

Our 1980 2-27 has a Universal 5411 and the exhaust elbow/riser was made with steel pipe. It broke at the end of last season at one of the threaded joints. As much as I told myself last fall that I wouldn't be rushing last minute to get it fixed in the spring, that's what I'm doing. I have a couple questions, for the group and Joe DeMers... My thought is to use Sch 80 at least for the pipe so there is some more metal left at the threads. Good idea or overkill? If good idea, pipe and elbows or just pipe? Should I use galvanized pipe or black pipe? The boat is in fresh water. Is there anything is diesel exhaust that would have a bad reaction with the zinc? I know the threads are cut after galvanizing, but it appears that the corrosion on the old pipe was on the inside. What should I seal the pipe joints with? I'm sure that typical stuff at plumbing supply houses is not for high temp use. Anyone know how hot the exhaust actually gets before the water mixes in? Anyone have any ideas how to get the old exhaust flange off? Heat and penetrating oil did not seem to do anything. At this point I've admitted defeat and was just going to get a new flange but I'm open to suggestions. I've seen that I can get an actual riser for this engine and not have to mess around with steel pipe. The issue that I see is that my current riser goes up about 10",to port about 8.5", then down about 14" to the muffler with the last 8" being hose after the water is mixed. The description of the part makes it look like the hose extension would be aft of my muffler at about the same elevation and I don't think I could connect the two. Has anyone replaced an exhaust like this? Thanks in advance for any advice. Bob Ellison

Hi Bob - Please send your phone number and best time to call. Joe DeMers Sound Marine Diesel LLC www.soundmarinediesel.com ----- Original Message ----- From: Bob Ellison To: Ca… [at] yahoogroups.com Sent: Saturday, April 05, 2008 1:58 PM Subject: [Cal_Boats] 5411 Exhaust Our 1980 2-27 has a Universal 5411 and the exhaust elbow/riser was made with steel pipe. It broke at the end of last season at one of the threaded joints. As much as I told myself last fall that I wouldn't be rushing last minute to get it fixed in the spring, that's what I'm doing. I have a couple questions, for the group and Joe DeMers... My thought is to use Sch 80 at least for the pipe so there is some more metal left at the threads. Good idea or overkill? If good idea, pipe and elbows or just pipe? Should I use galvanized pipe or black pipe? The boat is in fresh water. Is there anything is diesel exhaust that would have a bad reaction with the zinc? I know the threads are cut after galvanizing, but it appears that the corrosion on the old pipe was on the inside. What should I seal the pipe joints with? I'm sure that typical stuff at plumbing supply houses is not for high temp use. Anyone know how hot the exhaust actually gets before the water mixes in? Anyone have any ideas how to get the old exhaust flange off? Heat and penetrating oil did not seem to do anything. At this point I've admitted defeat and was just going to get a new flange but I'm open to suggestions. I've seen that I can get an actual riser for this engine and not have to mess around with steel pipe. The issue that I see is that my current riser goes up about 10",to port about 8.5", then down about 14" to the muffler with the last 8" being hose after the water is mixed. The description of the part makes it look like the hose extension would be aft of my muffler at about the same elevation and I don't think I could connect the two. Has anyone replaced an exhaust like this? Thanks in advance for any advice. Bob Ellison ------------------------------------------------------------------------------ No virus found in this incoming message. Checked by AVG. Version: 7.5.519 / Virus Database: 269.22.7/1361 - Release Date: 4/5/2008 7:53 AM