Side exaust

robingb · Post by **robingb** » Mon Nov 10, 2003 2:03 pm

While under way one of my side exhaust leaks exhaust fumes. It appears to be leaking where it goes through the hull. I've been told it's a common problem on the bertrams with side exhaust. I've also been told I can have the fiberglass exhaust pipe glassed to the hull side. Is this the correct way to make the repair? Has anybody else experienced this problem? Any ideas would be greatly appreciated. Thanks - Rob

will newton · Post by **will newton** » Thu Nov 13, 2003 5:02 am

Rob, I repaired my Genny blower the other month and was working right on the hull/exhaust connection. It appears to me that the fiberglass slit fitting that is screwed to the outside of the hull may be your problem. Unless you have a crack in the fiberglass piping that leads to the fiberglass throughhull elbow (which I doubt because it seems real stout) then I don't see how fumes can be getting back inside the hull. Take the 6 screws out of the fiberglass slit fitting on the outside of the hull. They sometimes get wacked during docking. If it is cracked, use some 3M fairing material or epoxy to fix the cracks. Put it back with 5200 and that should fix you up. Working in that area is a pain in the back as the only way to get access is through the storage area/line locker in the combing (you have to remove a piece of plywood to see the exhaust/hull tube connection). Let us know what you find and good luck. Will Newton 1989FBC33 Jacksonville, FL

skyking · Post by **skyking** » Sat Dec 06, 2003 12:18 pm

Hi Rob. I have an 82'33FBC w/454 Crusaders, with side exhausts also. Would you or anyone know if these side exhausts were only put on gas boats, and if I repower to diesel will I be able to use these side exhausts, or will I have to cut in new exhaust holes in the transom ???? Anyone have any ideas ??? Thanks Ken www.kenliller.com

lunderic · Post by **lunderic** » Sun Dec 07, 2003 11:39 am

Ken, I kept the side exhausts when I Repowered. I already had six inch exhausts out the stern as well. I used the existing muffler with the following modifications: 1. I cut out the 5" input flange and glassed in a 6" flange on each muffler. 2. I drilled a 1.5" hole through the baffles. The modifications were necessary to pass the Cummins exhaust backpressure test. Good Luck, Eric

skyking · Post by **skyking** » Sun Dec 07, 2003 1:40 pm

Hi Eric, Nice weather huh ??? Are you saying you (have)had side exhaust, AND 6 inch exhaust holes on the transom (at the waterline) too ???? If you say you had 6 inch exhaust hoses then you must have had reducers to go from 6 inch hoses into 5 inch mufflers (which you have now increased to 6inch)??? When you say you cut 1.5 holes in baffles, do you mean that you actually bored 1.5 inch holes through the center of the muffles to reduce back pressure ??? I have never seen my muffles-to-side exhaust slots (rectangluar holes in hull where exhaust only exits) Is there a hose that connects the exhaust side of muffles to side exhaust slot ??? And if you have 6 inch exhaust holes in the transom and your using the side exhaust, what has been done to these 6 inch holes ??? I have small pipes (maybe 2 inch diameter) where exhaust cooling water exits at the transom water level, where does your exhaust cooling water exit. ??? Who determined your acceptable level of back pressure, and did you measure it (and how did you do it), or did someone else ??? Sorry to bother you with all these questions, but I'd really like to have a good idea of whats supposed to happen when I get this project under way. Thanks again, my home phone # is: 914-907-5421 White Plains, NY If there is ever a convient time for me to speak with you on the phone, please call me and I'll call you right back(my dime). Any time tonight: Sunday night 12/7 (it's 7:40 now) would be great. Ken