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#1
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what are flappers
The flappers in my MaXum don't have rubber seals. They are a
close fit in the pipe, but don't touch the walls. Sounds like poor design... JR Richard Malcolm wrote: before I went on a several week vacation on my boat,(1993 245vista four winns, I/O)it started making this noise.the noise was metalic and sounded to a novice like me that it was comming from the engine or behind it. I took it to my mechanic afraid I had blown the engine or something and he said it was the flappers, some rubber had worn away, and not to worry. ok, so I trust him as he did not try to fix something that didn't need fixing, but I am not really sure what the flappers do. is this something that I should get fixed sometime, is it something that I can do? any info would be great thanks -- -------------------------------------------------------------- Home Page: http://www.seanet.com/~jasonrnorth |
#2
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what are flappers
If those are the flappers outside covering the exhaust outlet, they're
supposed to close momentarily when a following sea hits you, to keep the water from running up your exhaust. If the noise bothers you, replace them. -- Keith __ What do you do when you see an endangered animal eating an endangered plant? "Richard Malcolm" wrote in message om... before I went on a several week vacation on my boat,(1993 245vista four winns, I/O)it started making this noise.the noise was metalic and sounded to a novice like me that it was comming from the engine or behind it. I took it to my mechanic afraid I had blown the engine or something and he said it was the flappers, some rubber had worn away, and not to worry. ok, so I trust him as he did not try to fix something that didn't need fixing, but I am not really sure what the flappers do. is this something that I should get fixed sometime, is it something that I can do? any info would be great thanks |
#3
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what are flappers
They prevent water rushing up your exhaust and into the engine. Depending
on the type, replacing them usually is a pretty simple task unless you have to replace the whole assembly, including the exhaust pipe. That involves removing and replacing the portion of the exhaust pipe that goes through the transom. jps my boat has an OMC (Ford) King Cobra I/O 351(?) Does that help anyone to know if it is a simple job. Should I have this done when I take the boat out for the season? thanks |
#4
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what are flappers
Rich, I only know a *little* about this. On my boat the flapper is just a rubber part. The exhaust pipe sticks out the back of the transom by about an inch or so. The flapper just goes over that part of the exhaust pipe (on the outside) and is held on with a simple clamp. If yours are setup that way, it would be pretty easy to change. Maybe a little harder for you than for me since your swim platform it probably over the exhaust pipes. But very easy to do it was out of the water. Now, from what I read here, it sounds like some models have the flapper in the pipe (not attached outside). Then you'ld be into taking part of the exhaust pipe apart. Can you see the exhaust pipes coming out of the transom outside? Do they have rubber flappers over them? Gary |
#5
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what are flappers
"Gary Warner" wrote in message ... Rich, I only know a *little* about this. On my boat the flapper is just a rubber part. The exhaust pipe sticks out the back of the transom by about an inch or so. The flapper just goes over that part of the exhaust pipe (on the outside) and is held on with a simple clamp. If yours are setup that way, it would be pretty easy to change. Maybe a little harder for you than for me since your swim platform it probably over the exhaust pipes. But very easy to do it was out of the water. Now, from what I read here, it sounds like some models have the flapper in the pipe (not attached outside). Then you'ld be into taking part of the exhaust pipe apart. Can you see the exhaust pipes coming out of the transom outside? Do they have rubber flappers over them? The original poster mentioned that his boat was a 1993 Four Winns 245 Vista I/O. Do you actually believe that boat would have through-hull exhaust? |
#6
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what are flappers
The original poster mentioned that his boat was a 1993 Four Winns 245 Vista I/O. Do you actually believe that boat would have through-hull exhaust? Hehe, you totally cracked me up. You're crapping on the poor guy for making a mistake but at the same time pulling a nice newbie move yourself by quoting his *entire* post, forcing us to download and scroll through all that quoted crap, just to get to your helpful two-line response. Ahh, sweet irony. |
#7
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what are flappers
"Richard Malcolm" wrote in message
om... They prevent water rushing up your exhaust and into the engine. Depending on the type, replacing them usually is a pretty simple task unless you have to replace the whole assembly, including the exhaust pipe. That involves removing and replacing the portion of the exhaust pipe that goes through the transom. jps my boat has an OMC (Ford) King Cobra I/O 351(?) Does that help anyone to know if it is a simple job. Should I have this done when I take the boat out for the season? thanks That's a good question for your mechanic or someone who knows your particular situation. Advising you without knowing the situation is dicey business. |
#8
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what are flappers
"Paul" wrote in message
able.rogers.com... The original poster mentioned that his boat was a 1993 Four Winns 245 Vista I/O. Do you actually believe that boat would have through-hull exhaust? Hehe, you totally cracked me up. You're crapping on the poor guy for making a mistake but at the same time pulling a nice newbie move yourself by quoting his *entire* post, forcing us to download and scroll through all that quoted crap, just to get to your helpful two-line response. Ahh, sweet irony. Paul makes a good point that I missed. If you've got an I/O then you don't have thru hull exhaust. That means the flappers are likely metal plates that open to pass exhaust gasses out but close if water tries to enter. |
#9
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what are flappers
RG Wrote:
The original poster mentioned that his boat was a 1993 Four Winns 245 Vista I/O. Do you actually believe that boat would have through-hull exhaust? RG, I said in my post that I didn't know much about it. Three summers ago I used a boat (split expenses with a guy) that was an I/O that had exhaust pipe go through the transom. So, yes, I though that might be a possibility. If I'm way off, so be it. I indicated I didn't know much about this. So, do you have any helpful information for the poster? Gary |
#10
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what are flappers
Hi Richard,
your flapper doors are very necessary to preventing hydrolock of you engine. I lost an engine to an incompetent mechanic that decided in his infinite stupidity, that flappers were not necessary. It cost me a 7.4 engine and 2 weeks down time during the height of charter season. Capt. Frank http://www.home.earthlink.net/~aartworks Richard Malcolm wrote: before I went on a several week vacation on my boat,(1993 245vista four winns, I/O)it started making this noise.the noise was metalic and sounded to a novice like me that it was comming from the engine or behind it. I took it to my mechanic afraid I had blown the engine or something and he said it was the flappers, some rubber had worn away, and not to worry. ok, so I trust him as he did not try to fix something that didn't need fixing, but I am not really sure what the flappers do. is this something that I should get fixed sometime, is it something that I can do? any info would be great thanks |
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