Why do my rubber exhaust flappers keep failing?
#1
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Why do my rubber exhaust flappers keep failing?
When I got the boat last spring it needed two new exhaust flappers so I replaced them (internal rubber flappers).
I just noticed that they are both bad again after 30 hours. Any suggestions? (IMCO Power Flow exhaust straight out the back bolted on a stock 502)
Mike
Portland Oregon
I just noticed that they are both bad again after 30 hours. Any suggestions? (IMCO Power Flow exhaust straight out the back bolted on a stock 502)
Mike
Portland Oregon
#2
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I can think of heat degradation and abrasive degradation as two possible causes.
Heat - is there any discoloring of your risers? I'm not familiar with the imco power flow - is it stainless? How's the water flow, and restrictions in your system?
Abrasive - is there sand or other particles in your water? How's the condition of the impeller for the raw water pump?
What kind of rubber flappers are you using? Maybe there was a bas manufacturing batch?
Ryan
Heat - is there any discoloring of your risers? I'm not familiar with the imco power flow - is it stainless? How's the water flow, and restrictions in your system?
Abrasive - is there sand or other particles in your water? How's the condition of the impeller for the raw water pump?
What kind of rubber flappers are you using? Maybe there was a bas manufacturing batch?
Ryan
#4
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When I got the boat last spring it needed two new exhaust flappers so I replaced them (internal rubber flappers).
I just noticed that they are both bad again after 30 hours. Any suggestions? (IMCO Power Flow exhaust straight out the back bolted on a stock 502)
Mike
Portland Oregon
I just noticed that they are both bad again after 30 hours. Any suggestions? (IMCO Power Flow exhaust straight out the back bolted on a stock 502)
Mike
Portland Oregon
#7
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OP, I agree sounds like lack of water.
#9
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#10
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I've burned 2 sets last season within 1 week of run time and the manufacturer replaced them under warranty, but after the 2nd time lasting less than an hour, I took them out and don't have anything at this point. Going to reinstall this season again to see what happens. I have SM full system.