thru hull exhaust fitting

[jcb1977]

I happened to notice the thru hull exhaust fitting yesterday looked a little rough. the edge around the hole is exposed and doesnt' seem like the rubber gasket is properly placed. I can't recall what this looked like on my 2019. would someone be able to take alook at yours and let me know if this looks off?

I am chasing water in the bilge, and wondering if this could be a contributor. the exhaust on the other side looked very similar to the one in the picture.

 

[David Martin]

Clean up the rough fiberglass and seal with a 3M 5200 type caulk then put a new rubber flapper .........the caulk needs to be sealed to the raw areas and smooth into the pipe joint............as water comes into the pipe past the flapper the caulk keeps the water inside the pipe where it belongs

 

[jcb1977]

Clean up the rough fiberglass and seal with a 3M 5200 type caulk then put a new rubber flapper .........the caulk needs to be sealed to the raw areas and smooth into the pipe joint............as water comes into the pipe past the flapper the caulk keeps the water inside the pipe where it belongs

is the rubber flapper trim supposed to be on the outside of the boat or inside? seems like it's not in the right place on mine but having trouble envisioning where it's supposed to be. or is there a groove on the flapper where it's supposed to around the rough fiberglass?

 

[David Martin]

My best guess is after looking at the Service manual the gasket go's internal the back side of the fiberglass fits against the pipe end and get squeezed against the fiberglass............is calls for silicon caulk as a sealant and a large chunk of my silicon (squish out) has fallen out not to long ago...........maybe worth a look for me as well.

I don't remember rubber on the outside of the glass ..........only the 3 SS bolts that pulls the pipe and forward to seal, and the raw fiberglass cut ends that could soak up a little water.

 

[Neutron]

The "flapper" is part of the pipe on the inside, its not replaceable by itself and yes its supposed to be on the inside. Its part of what seals the exhaust to the hull with the 3 bolts. Other than the rough edges, it supposed to be like that. The fingers are there to keep large debris from entering

 

[jcb1977]

thanks.... that's the conclusion I came to as well after looking up the various parts. I might just use some 5200 to clean up the rough edges and call it a day.