Trojan Boat Forum

summer storm wrote:Sounds like not many people use the strange thing the hose is connected to............................................the seacock??

Speaking hoses...how about them hose clamps. Hoses should always be doubled clamp using SS clamps! Have seen enough boats with rusted clamps just hanging in there...in pieces.

alexander38 wrote:Was it a searay? Ron

Nope!!!! It was a $120k mainship

summer storm wrote:Sounds like not many people use the strange thing the hose is connected to............................................the seacock??

Amazing but true! You would think that would be the first thing they do - turn it off.

I have never seen a seacock on a exhaust hose

prowlersfish wrote:I have never seen a seacock on a exhaust hose

Might just be bigger boat stuff. The 115 I run has underwater exhaust for running at speed and transon exhaust for slow speed. There are seacocks (more like valves) to shut down the underwater outlets to allow the removal of the molded risers that go to the diverter.

I just assumed that the 36 tri with a more basic underwater system would allow the port to be closed. So now I am wondering, on the tri is the hose just connected to a fitting with hose clamps below the water line?

I'm like prowlerfish, I've never seen or heard of a seacock on an exhaust. Flappers I am familiar with, never seen them work very well but have seen them.

You're not alone, I've also never seen or heard of a seacock on an exhaust. Flappers keep the waters out right??

Flappers are installed on some I/O s and they kind of work till they burn out . Some folks put external flappers on their exhaust use to see them all the time not to often now a days


BTW welcome to the forums

Below is a photo of my generator exhaust with a seacock attached. This is not the intake but the exhaust. I have 4 of these onboard, one on each main and 1 on each generator. Yes, the exhaust gases and the raw cooling water discharge through this hose, and is factory installed.


http://picasaweb.google.com/yachtMissyB ... 3926423858

What boat is this on ? . if this is exhaust then it is mis labeled please don't tell me this is a C.G. inspected vessel .

I haven't seen a set-up like this before. Exhaust through a gate valve...hmmm. See gate valves on waste/discharge hose from tanks below the water line but not exhaust.

See something new every day.

I was intirigued so, after a little research, I discovered that some generators (Fischer Panda) may use a water separator exhaust muffler. It separates the exhaust gasses and discharge water. The water exits through one fitting, with a seacock and the other discharges through another through hull, with just exhaust gasses. This makes for a quieter system.

Maybe Doug will enlighten us.

Thanks.

I have a water separator on my gen exhaust. By removing the water from the exhaust gases, it removes the "gurgling" sound normally heard from a wet exhaust. The result is a quiet & consistent exhaust sound. The water discharge from the separator can be located above or below the waterline, however if below the waterline it requires a ball ball or gate valve.

Stripermann2 wrote:I was intirigued so, after a little research, I discovered that some generators (Fischer Panda) may use a water separator exhaust muffler. It separates the exhaust gasses and discharge water. The water exits through one fitting, with a seacock and the other discharges through another through hull, with just exhaust gasses. This makes for a quieter system.

Maybe Doug will enlighten us.

Thanks.

You are correct. The newer designs can channel the exhaust either to the underwater opening or to a smaller discharge just above the waterline (with out the water) depending on what the boat is doing. This is to reduce the black streak the generators or main engines make down the side of the yachts while underway. My mains at speed discharge underwater and at rest out the back of the boat. I have valves on all four for good reasons.

As far as the boat I run, it is a 268 ton motor yacht. No it is not CG inspected but it is in class and passes survey every year. The labeling is correct as it pertains to the DNV classification guidelines. Keep in mind that this is not a US built boat and things are done differently in other countries.

That's just a little bigger than mine, Doug

Ron