Failed Exhaust Flappers
#1
Failed Exhaust Flappers
While winterizing my boat this weekend I had to start and run the boat after I changed the engine oil to check the oil level. I noticed a knocking sound coming from the starboard side of the engine while in the boat with the hatch up. Turned out to be coming from the exhaust. Upon further investigation I noticed that the flapper in the port side exhaust was only 50% intact while the starboard flapper was 100% intact. I contacted Nordic and they informed me that that knocking sound is prevalent with the flappers 100% intact.
Obviously I need to replace the port side flapper and the question I have are these prone to fail and how many Nordic owners have verified their exhaust flappers are still 100% intact?? My boat (07 Rage w/496HO w/ 80hrs) has the exhaust coming out of both corners of the transom. I just stuck my hand inside the exhaust outlet and could feel the condition of the flapper.
Thanks
Steven
Obviously I need to replace the port side flapper and the question I have are these prone to fail and how many Nordic owners have verified their exhaust flappers are still 100% intact?? My boat (07 Rage w/496HO w/ 80hrs) has the exhaust coming out of both corners of the transom. I just stuck my hand inside the exhaust outlet and could feel the condition of the flapper.
Thanks
Steven
#2
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i only have half of the flaps on both sides, i had this exact problem with my imco tips as well, the rubber ones WILL fail in a short period of time, only remedy is to get stainless flaps which i don't know if nordic has them, may be able to get some and put them in yourself, i don't worry too much since there is some bends in the exhaust and i always ease back when falling off plane to avoid the wall of water washing over the transom
#3
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Join Date: Oct 2000
Location: Spicewood, Texas USA
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Just about every Nordic I've seen with corner exhaust has flappers broken. They are made by IMCO. I replaced numerous ones but finally just gave up. I've only seen one engine damaged from water ingestion (2004 Rage 496) and I found flappers missing. Can't say for sure that was the cause. Probably other contributing factors also.
Bob
Full Throttle Marine
Bob
Full Throttle Marine