Boats For Sale:
Exhaust Flappers |
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Nautique2001 
Grand Poobah 
Joined: June-14-2004 Location: Massachusetts Status: Offline Points: 2832 |
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 Topic: Exhaust FlappersPosted: June-27-2009 at 8:58pm |
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One of my rubbers broke off my exhaust pipe today. I just spend $40 for two new ones. Are they even necessary? The classic Correct Crafts don't have them. I assume it's a noise control device?
Ken |
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81nautique
Grand Poobah
Joined: September-03-2005 Location: Big Rock, Il Status: Offline Points: 5781 |
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Posted: June-27-2009 at 10:41pm |
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Last time one of my rubbers broke I didn't sleep for a month.
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You can’t change the wind but you can adjust your sails
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Riley
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Joined: January-19-2004 Location: Portland, ME Status: Offline Points: 7954 |
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Posted: June-27-2009 at 11:17pm |
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Ken, I wouldn't think you need them with the type of manifolds that you have. However, many people have them including me. Are yours the ordinary rubber type, but are glued inside the plastic exhaust flange?
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Hooty222
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Joined: May-10-2009 Location: Flagstaff AZ Status: Offline Points: 141 |
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Posted: June-28-2009 at 12:59am |
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Someone made a comment one time... The exhaust flappers were for the rare instance (Not sure how) the engine on shutdown could pull exhaust/water backwards thru pipe into engine after dieseling... Smarter people than I.
Bob |
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1986 Ski nautique 351
1988 Barefoot nautique 454 |
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Nautique2001
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Joined: June-14-2004 Location: Massachusetts Status: Offline Points: 2832 |
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Posted: June-28-2009 at 9:09am |
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Yes, mine are the standard rubber type. It seems like they need to be replaced every 3-4 years, which isn't bad.
Thanks for the feedback. It makes sense that it may prevent water from being sucked through. I thought it was more for noise damping. Ken |
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scottb
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Joined: July-05-2006 Location: Bolingbrook, IL Status: Offline Points: 376 |
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Posted: June-28-2009 at 12:45pm |
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I have also heard they are good for keeping critters from building nests and such in there.
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86BFN
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Joined: July-28-2008 Location: Indiana Status: Offline Points: 882 |
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Posted: June-28-2009 at 3:10pm |
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I've had two boats with them on. Took them both off, never had a problem.
I think it sounds better. I always back into the water slowly when launching! Good idea on the critters tho. Maybe I'll use them for storage. JIC. |
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dt's76tique
Newbie 
Joined: July-09-2008 Location: United States Status: Offline Points: 18 |
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Posted: June-28-2009 at 10:48pm |
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My originals broke off and i replaced them. ran one summer with out them no problems. I did get new ones from wholesale marine they are $15 each
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The Godfather
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Joined: August-13-2008 Location: Orlando Fla Status: Offline Points: 1766 |
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Posted: June-29-2009 at 1:20am |
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That was a good one Alan and now you have Ken thinking "OH NO"...hehe
To much wine.... |
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SN206
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Joined: February-25-2009 Location: Fort Worth, TX Status: Offline Points: 2339 |
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Posted: June-29-2009 at 2:01am |
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Seen a "2001" suck water last year. Up until that time I did not think they were needed. They funny thing was he had replacements in the boat, but he had wanted to wait until after his test run. Fortunately, he was still on his traler on the ramp while he was tuning the carb. It ruined his day. Think the $30 dollar assurance would be worth it
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...those who have fallen and those who will.
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1man1dog1cj
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Joined: December-06-2007 Location: United States Status: Offline Points: 23 |
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Posted: July-09-2009 at 1:33pm |
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Mine have become kind of deformed over time. How do you say they are attached? Glued? I think mine have hose clamps on them, but that could just be on the exhaust where it comes thru the hull.
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WakeSlayer
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Joined: March-15-2006 Location: United States Status: Offline Points: 2138 |
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Posted: July-12-2009 at 3:10am |
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My SAN has hoseclamps. I removed them from the Mustang.
Maybe you could try a hoseclamp next time, Alan. |
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Mike N
1968 Mustang |
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Sam B
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Joined: November-17-2007 Location: StevensPoint WI Status: Offline Points: 393 |
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Posted: July-12-2009 at 10:58am |
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What is the sound change on vs. off?
Sam |
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86BFN
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Joined: July-28-2008 Location: Indiana Status: Offline Points: 882 |
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Posted: July-12-2009 at 4:15pm |
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Off sounds slightly better, not a lot thou.
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Nautique2001
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Joined: June-14-2004 Location: Massachusetts Status: Offline Points: 2832 |
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Posted: July-12-2009 at 6:58pm |
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I did replace them. My luck would be that I'd sink have an engine malfunction. For $40, it's a piece of mind. There had to have been a reason Correct Craft Inc. installed them, right?
Ken |
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skimzone
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Joined: July-12-2009 Location: Pensacola Fl Status: Offline Points: 47 |
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Posted: July-14-2009 at 2:20am |
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I had a rare occurance approx 1 yr ago, customer with a 2001 bought a boat with no flappers. At the ramp he drop the boat in, steep ramp+ fast launch= water in the engine. SALT WATER. He tried to turn it over with the plugs in- hydraulic instead of compression. Rod damage. If he would have pulled the plugs and spun er over- he wouldnt have paid me to rebuild the engine. I say play it safe- dont fool around without rubbers!!!
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'78 ski nautique
'01 sport air nautique |
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kapla
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Joined: March-27-2008 Location: BA, Argentina Status: Offline Points: 6148 |
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Posted: July-15-2009 at 7:37pm |
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Joe you kill me LOL...i like your dumb clients stories!!!
I run my boat with out them quite a long time..then I decided to put it again...just as it came from the factory it have to be a good reason...But in boats with the invertaflow I think its very rare that the water could make up that way when going reverse or launchind the boat. The muffler sits very high.... |
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<a href="">1992 ski nautique
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skutsch
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Joined: June-19-2008 Location: Racine, WI Status: Offline Points: 2874 |
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Posted: July-15-2009 at 8:42pm |
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Joe, yes please more "dumb customer" stories, they kill me, but usually there is nugget in their... The 67 Nautique never had flapper and we have never had a problem, but no way is the water gonna make it through the Eaton marine conversion manifolds thats part of the Interceptor, I think those things are as high as the gunnels...
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skimzone
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Joined: July-12-2009 Location: Pensacola Fl Status: Offline Points: 47 |
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Posted: July-16-2009 at 12:07am |
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Hey- thier mistakes keep my hobbies floating- regarding flappers- thank god noone has a 1996 and later gm- shut her down from idle 99% chance you will have water in the engine. Designe flaw on the vortech 64cc head. valves over lap=intake/exhaust very briefly open at the same time. Helps with performance and economy- But sucks-literally!!I have rebuilt countless engines due to that flaw- better riser design would fix the problem. a quick low rev prior to ignition kill also can save alot of them too. The exhaust force the water thru the turn down, thus less chance of injestion. They are not dumb customers- Just NO common sense I wont share anymore laughs with you guys=k
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'78 ski nautique
'01 sport air nautique |
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fastjohnny
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Joined: August-26-2008 Location: United States Status: Offline Points: 22 |
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Posted: July-16-2009 at 1:19am |
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Good to know!
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