what would cause my upper pipe to lower pipe hose on port side exhaust to pop?

[jimedac]

I just replaced the hose on my port side exhaust and it burst again. a mechanic told me it could be a exhaust restriction like my flapper fell off but i cant seem to find them. I ran an electrica wire pulling snake through the y-pipe and it is free of restrictions. I did not get an overheat wouldnt a exhaust restriction cause an over heat?

thanks

jimedac

 

[jimedac]

Re: what would cause my upper pipe to lower pipe hose on port side exhaust to pop?

my boat has a 1995 5.8fi hu motor i would really appreciate help on this thanx.


jimedac

 

[Ciera2450]

Re: what would cause my upper pipe to lower pipe hose on port side exhaust to pop?

Is there perhaps a cooling issue on the port side? is it running hotter than the starboard?
The "flapper" is located in the exhaust bellows I believe.
If the flapper was faulty, i would think both sides would be affected.

I'm no mechanic, just my thoughts.
I'm sure some smart guys will come along to help you.

 

[jimedac]

Re: what would cause my upper pipe to lower pipe hose on port side exhaust to pop?

The tube is not burning its popping flappers are no longer there.

 

[Ciera2450]

Re: what would cause my upper pipe to lower pipe hose on port side exhaust to pop?

If it is bursting from pressure, you have a blockage somewhere not letting the exhaust gases and water flow out. Perhaps where the y-pipe meets the transom shield? I know you snaked the ypipe, but perhaps it is after the ypipe....have you removed the exhaust bellows and checked there for possible obstruction?
Certainly an odd problem to have.

 

[Ciera2450]

Re: what would cause my upper pipe to lower pipe hose on port side exhaust to pop?

do you get water flow out of your drive?

 

[jimedac]

Re: what would cause my upper pipe to lower pipe hose on port side exhaust to pop?

ciera i have a marine mechanic looking at it for me but it will be a few days before he gets to it. that is what he was thinking possibly the flappers. but unlike what is posted here he believes the flappers are necessary and their absence could cause hydroloc.


thanx

jimedac