Water lock

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Patrick McDonald

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Oct 30, 2019
16
The previous owner of my Vega removed the original water lock and reconnected the exhaust hose with a short length of brass pipe. The engine is the original MD6B, with a MD7A exhaust elbow . I am planning on installing a new waterlock, either a Vetus NLP 45 or a Vetus LP45 but it looks like it may be a little difficult getting the water lock low enough in the bilge so that it works properly. At the present, the exhaust hose dips down into the bilge, before going aft to the gooseneck.(sort of poor boy water trap) Any suggestions on a replacement water lock?

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n3935j

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Oct 31, 2019
58
Steve,
The exhaust elbow is 45mm, so I'm going with the LP45,Pa
Thank you for your help,
Pat

Steve Birch steve@... wrote:
Hi

Ive always used the LP40 or LP45 depending on the hose diameter you use.

Cheers

Steve B
 
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brockhaus77

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Jul 24, 2002
149
In case you are still looking into this issue, I followed Vetus' advice and
bought BOTH their waterlock AND a muffler (plus their exhaust pipe).
I put the waterlock right above the prop shaft (the lowest point it can be)
and the muffler further back, right before the "elbow" (with pieces of exhaust
pipe in between). This arrangement
has worked fine for me so far; I can't really remember what the engine
sounded before (if the muffler in fact did "muffle" anything).

- Sebastian (1060 VegaLyra)
 
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n3935j

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Oct 31, 2019
58
Thank you for your input Sebastian. I bought the LP45 Vetus, and it looks like my hook up will be very similar to yours. Hard to get it low enough to keep a down slope on the exhaust hose from the engine though, if you follow Vetus suggestion for a 12" length of exhaust hose from the elbow to the water lock. Which lock did you use?
Pat
 
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groundhogyh

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May 30, 2006
1,075
Hi,
Am I getting from this discussion that the original set-up for Vegas with the MD6A had this water lock? Don't think mine has this. Mine just has a long black pipe that angles down to the back of the boat and then hits the gooseneck. So the bottom most point is just at the back of the boat.
thanks,
roy
 
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pjacobs55

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Oct 30, 2019
1,459
Mine had a similar pipe (originally Albin gas engine) that had been
re-used when the Yanmar was installed. I believe it's called a "dry"
exhaust.

It consisted of a black rubber hose with a smaller copper tube
running down the middle, centered in the hose with stand-offs.

The exhaust gases went through the copper tube and the cooling water
passed over the copper, running through the rubber hose.

Just before the transom loop the water was injected into the tube,
combining with gases and happily exiting through the transom.

Unfortunately, or maybe fortunately, the copper tube was full of
holes, forcing me to completely rebuild the whole thing. I chose
a "wet" system using the Vetus Waterlock. It's in it's third year and
has served well.

Peter
#1331 'Sin Tacha'
 
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pelagicasd

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Jan 28, 2001
694
Hi Peter. Looks a lot like what we did with Lyric. Beware though. After sitting in Mexico when we got back we had no water in the exhaust. Traced it down to a clogged mixing elbow. No water getting through due to a mix of solidified salt and sediment. Hot gases did get through. Next thing we new the Vetus lock was on fire and melting. Fortunately the chandlery in La Paz had one but it was rather expensive. A word to the wise, always visually check that the exhaust has water in it. Walt
PS We had to take the elbow off of the manifold and used muriatic acid to dissolve the stuff in it. For those not familiar with it muriatic acid is okay for steel but it will dissolve aluminum.To: AlbinVega@yahoogroups.comFrom: motorcoaster@...: Mon, 7 Jan 2008 20:49:13 -0800Subject: Re: [AlbinVega] Re: Water lock

Nice clean installation Peter, thanks for sharing the pictures.Patrickpjacobs55 prjacobs@... wrote:I used a Vetus WLOCKLP on my Yanmar, and kept the original copper loop at the transom.Picture of Vetus: http://www3.telus.net/sailing/vetus.jpgPicture of loop: http://www3.telus.net/sailing/loop.jpgPeter#1331 'Sin Tacha'
 
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brockhaus77

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Jul 24, 2002
149
I should say that I have a VETUS engine as well as the
water lock and muffler - maybe that makes a different
in the geometrical arrangement. In any case, the engine
has a mixing elbow, followed by a short piece of exhaust
hose (maybe 12") attached to the water lock. So my water
lock is CLOSER to the engine than in your picture, deep
down in the bilge (barely NOT touching the propellor
shaft). So it's definitely low enough, but I appreciate the
warning about the whole thing melting (or even burning!?!)
if you forget to check that water is coming out the back
whenever the engine is running.
Unfortunately I don't have the records to show what
specific VETUS parts I bought (it's been quite a few years
ago), but it should be pretty obvious from the catalog once
you determine the proper hose diameter. (Looks like a
swan... ;-)

- Sebastian
 
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