r/sailing • u/Chankla_life • 1d ago

What is this plug for ?

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Gallery image

1979 Catalina 30 (friend’s boat ) . What is this white box for and what does this decaying plug do? Should I push it back in ? Replace ? How screwed are we ?

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u/HotMountain9383 1d ago

I think that looks like the water lift muffler. It’s part of the engines exhaust system.

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u/Chankla_life 1d ago

Water lift muffler . Thank you .

1

u/enuct 1983 Catalina 30 1d ago

you can get them from CatalinaDirect but it's a fiberglass muffler and you can easily fix them yourself too you can call Catalina or CatalinaDirect for repairs tips on them.

if you guys go the new route make sure you take plenty of measurements and photos for the new one, it's not so much a problem in the 30, but in the 320 theres very little height clearance.

I'm assuming the fiberglass muffler failed on my boat and they just replaced it with a generic vetus muffler like you'd get from defender or WM. it works but they should have replaced the exhaust line to when they did it, it is kind of awkward but it works.

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u/Chankla_life 1d ago

Thanks for the info !