Aqua Lift Muffler replacement

[SeaEric]

I have a mid 80's vintage 8kw Genset aboard my boat. The engine is a Yanmar 3 cyl, direct injection (no glow plugs) connected to an aging, rusty metal aqua lift type muffler. At commissioning this spring, an inspection of this muffler revealed some advanced evidence of corrosion that looks like a leak getting ready to happen. We measured the plumbing in place and it looks like 1 7/8" or 2" side inlet/top outlet configuration. The existing metal unit is round, about 12" in diameter and maybe 14" tall.

I took a look at the Centek/Vernalift website for a replacement. They offer both 1.88" inlet/outlet and 2" inlet/outlet so I perhaps need to pull the hoses to get a more accurate reading on what I have now. The curious thing is that in this size inlet, the units are offered in 9" diameter round and a 10.5" diameter round sizes.

My question is: Which size do I buy? Both are smaller than my existing. I'd like to go the smaller of the 2 if I can for space saving. On a previous gas powered boat I had an 8kw Westerbeke with a very small round muffler and it worked fine. Any thoughts?

 

[jim rosenthal]

Did you ask Centek which one they would recommend? When I converted from gas to diesel, I was surprised at how small the waterlift muffler recommended by Northern Lights was....it's tiny compared to what came out. The only advantage of the bigger muffler is that you can crank the genset longer before the water backs up into the engine , which may not be an advantage at all. The one for my 6kW Northern Lights is maybe a foot tall and ten inches wide. If that. It appears to be made by Centek.

 

[SeaEric]

I'm going to give Centak a call in the morning. I got on this project after business hours today, and they were already closed. I figured the wisdom here was almost as good, perhaps better.

 

[Angela]

I'm using the Vernalift 2" in/2" out (side/top) that is the 10.5" (Model 1500027) unit on my 15kw Westerbeke. Don't know if that helps you. New, that one can be found between $112 and $144.

 

[Banshee36]

Vetus makes a waterlock muffler, cheap, plastic and works well. I have it on a 5KW NL genset.
JW