Water Muffler - ?Maintenance Free Component?

[rardiH36]

The water muffler is next component down stream of the subject of my recent mixing elbow posts. Got me to wondering.

I don't think I've ever seen (nor a quick search of the archives yielded a result) much about the muffler. Leads me to think that this must be one of the only mechanical components on a boat that don't provide a DIY challenge very often?

Is the muffler something you just look at periodically to inspect the condition of the exhaust hoses, and the clamps, and that the case isn't cracked/leaking? And if water is spitting out of the exhaust discharge, and its quiet, then just accept that nothing needs be done?

How long does a water muffler last in a salt water environment? What are indications that it might be about to fail? What is a water muffler's internal construction?

I have read Mainsail's posts a month or so ago about the important of anti-siphon loops and valves.

Mine muffler, which has a black polyethelene looking case, looks quite good from the outside, anyway.

thanks and regards,
rardi

 

[Deadline]

That's about right. You can't see much anyway when you look inside. Of all the things that can go wrong, this is probably last on the list.

 

[CalebD]

While the water lift muffler is probably last on the list of maintenance items for most folks they are not immune from failure or malfunction. A lot may depend on the age of the equipment and plumbing.
A few weeks ago I helped a fellow get his boat to his mooring after splashing in. His Atomic 4 engine was running rough and would not run without the choke. Even with the choke out the engine died under load after about 10 minutes of running erratically. He had re-done the whole fuel side of his engine and was ready to call a mechanic. I suggested that exhaust system back pressure could easily produce the symptoms his engine was experiencing. He decided to disconnect his WL muffler and brought it back to shore and cleaned out a bunch of crap which had accumulated there. Once re-connected his engine was running fine.
Moral of the story: don't take anything for granted.