gen-set and co

alexander38 · Post by **alexander38** » Sun Feb 19, 2012 5:52 am

here's thought I had, We like to swing on the hook a lot and also have the Genny runnin' to. Well here's an ideal I seen another site a while back take a pc of pipe fit it to the over board discharge about 8 to 12 inches long then place a 45 on it and run another down to the water just a couple of inches under it to trap the gases in the water, thoughts ? And yes it would be removable and installed from the dinghy

aaronbocknek · Post by **aaronbocknek** » Sun Feb 19, 2012 6:39 am

hey tony, i'm back but still feeling like crap. so let me see if i get this. there would be a pipe, attached to the overboard genset exhaust that dumps the discharge water and exhaust below the waterline? i'd love to see a pic of that if you can post. but, is there not a danger of too much back pressure?
the folks behind me have a 49 foot meridian and their generator exhaust water goes below the water line (there is a seacock attached to the starboard side thru hull fitting) but the exhaust gas exits just above the boot strip, starboard side. it's the oddest set up i've seen, but, it cuts down on the 'noise'. i'm just curious how this would all work.
aaron

are we sitting first watch again?

alexander38 · Post by **alexander38** » Sun Feb 19, 2012 7:16 am

back pressure is the worry, but my thought is I'd have to make sure I'm not below the muffler, which is below the water line , the top of it is at the line and the thru hull is 6" inches above it, My plan is to put it maybe just 3 inches in the water to cut down on CO...

And just in case anyone wondering every section of my boat has a CO detector in it, and the aft cabin has a 12v 110v and battery one for 3 in there

Stripermann2 · Post by **Stripermann2** » Sun Feb 19, 2012 7:19 am

Tony, you'd be poisoning fish and sealife with CO.

Actually, I like the idea. Or you could just turn the music up...

RWS · Post by **RWS** » Sun Feb 19, 2012 7:20 am

perhaps I don't understand but it seems to me that even if you blew the exhaust out onderwater, the CO would come back up.

The alarms are PRICELESS.

RWS

Stripermann2 · Post by **Stripermann2** » Sun Feb 19, 2012 7:23 am

RWS, I think Tony just wants a quieter exhaust. Especially if on the hook with other boats.

aaronbocknek · Post by **aaronbocknek** » Sun Feb 19, 2012 7:25 am

alexander38 wrote:back pressure is the worry, but my thought is I'd have to make sure I'm not below the muffler, which is below the water line , the top of it is at the line and the thru hull is 6" inches above it, My plan is to put it maybe just 3 inches in the water to cut down on CO...

And just in case anyone wondering every section of my boat has a CO detector in it, and the aft cabin has a 12v 110v and battery one for 3 in there

how would it attach? again, you have piqued my curiosity. do you have the 'standard' onan 6.5kw mcck 'paper weight' in the bilge? my kingdom for a new kohler or westerbeke!

alexander38 · Post by **alexander38** » Sun Feb 19, 2012 7:39 am

aaronbocknek wrote:
alexander38 wrote:back pressure is the worry, but my thought is I'd have to make sure I'm not below the muffler, which is below the water line , the top of it is at the line and the thru hull is 6" inches above it, My plan is to put it maybe just 3 inches in the water to cut down on CO...

And just in case anyone wondering every section of my boat has a CO detector in it, and the aft cabin has a 12v 110v and battery one for 3 in there
how would it attach? again, you have piqued my curiosity. do you have the 'standard' onan 6.5kw mcck 'paper weight' in the bilge? my kingdom for a new kohler or westerbeke!

1st... screw the fish...

2nd take the noise level down some and displace the CO..
3rd paper weight ? after tuning up my Onan last pre-season with the point replacement system I found online and a carb over-haul the baby sings....and has never failed us...

RWS · Post by **RWS** » Sun Feb 19, 2012 7:43 am

I replaced our 6.5 gas onan with a 5.0kW diesel unit in 2003.

Installed a GEN SEP to separate out the cooling water from the exhaust gas

the result:

the diesel genny is actually QUIETER than the gas unit.

RWS

alexander38 · Post by **alexander38** » Sun Feb 19, 2012 7:48 am

RWS wrote:I replaced our 6.5 gas onan with a 5.0kW diesel unit in 2003.

Installed a GEN SEP to separate out the cooling water from the exhaust gas

the result:

the diesel genny is actually QUIETER than the gas unit.

RWS

next boat you betcha..this one nope...but the up dates to the Onan did cut down on the noise alot.

foofer b · Post by **foofer b** » Sun Feb 19, 2012 8:03 am

My $.02 worth- Honda 2000i on the swim platform.

alexander38 · Post by **alexander38** » Sun Feb 19, 2012 8:13 am

[quote="foofer b"]My $.02 worth- Honda 2000i on the swim platform.[/quote

that thing won't power up all 3 ac's and a oven, mico wave and the waterheater.....

and the pups love sleeping in 72 degree air...

Allen Sr · Post by **Allen Sr** » Sun Feb 19, 2012 8:18 am

alexander38 wrote:
foofer b wrote:My $.02 worth- Honda 2000i on the swim platform.[/quote

that thing won't power up all 3 ac's and a oven, mico wave and the waterheater.....

and the pups love sleeping in 72 degree air...

Yeah, I bet the pup's aren't the only ones spoiled sleeping in 72 degree air!!!!!!

alexander38 · Post by **alexander38** » Sun Feb 19, 2012 8:19 am

ok the wife too.....

Big D · Post by **Big D** » Sun Feb 19, 2012 8:21 am

My genny exhaust originally had a copper 1 1/2" copper elbow with a little hole drilled in it to relieve presure, and was attached to the through hull. This had a straight piece hugging the transom down to and just below the water line. This set up was soldered on the the brass through hull which I caught just starting to come apart so I removed it on the hook one day. Thought it would make a difference on the nice factor but it really hasn't much. Still debating if I'm going to install another one or not but not at the top of my hit list right now. Way too many other things on the go. Glad you brought it up though. I'm adding it to my list for future consideration.