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Old 27-12-2015, 01:54   #1
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Massive amount of exhaust fumes

History - Motor had not run for 12 months:
Started the motor and the sea water shortly stopped coming out the exhaust.
Jabbsco pumps' impellor was no good : the metal shaft had separated from the rubber vanes.
Imstalled new impellor.
When the motor was restarted - again, no water coming form the exhaust.
( the motor ran for less than 5 mins while this was determined )
Water was added to the "strainer" at the top of the loop - the loop that comes from the inlet ( seacock) down below , up to the strainer , then down to the pump with the impellor .
Situation was then good - water coming form exhaust when motor started.

Then motor sailed for 48 hours - with the occasional stop for oil checking etc.

Then the impeller **** itself again. When I took it out, most of the rubber vanes were smashed completely.

( Have written a separate post about this impeeler problem)

At the same time massive amounts of exhaust fumes became apparant.
When I held me hand down by the Vetus waterlock I could feel stronbgly "puffing" but could not feel any hole. Access is difficult.


Working theory at moment = the Vetus water lock got overheated and perished?
Open to other suggestions , questions / comment.

Was a delivery trip - sailed into harbour, flew home for Xmas. The plan is to go back in coupla weeks, replace the impeller and the waterlock and deliver the yacht to her home port 100 miles down the coast.

Questions comments and suggestions welcomed.
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Old 27-12-2015, 07:46   #2
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Re: Massive amount of exhaust fumes

Sounds like you need massive amounts of silicone to patch up the Vetus for the rest of the trip. It does not need to be pretty
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Old 27-12-2015, 07:54   #3
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Re: Massive amount of exhaust fumes

That's been my experience with the vetus water lock.......no water for any length of time = new muffler.


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Old 27-12-2015, 08:19   #4
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Re: Massive amount of exhaust fumes

First, it sounds like insufficient water is making it to the water pump. Clogged thruhull?
Air leak in strainer or hoses? Air leak at pump?

The muffler is likely shot, or a hose has cracked.
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Old 27-12-2015, 09:35   #5
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Re: Massive amount of exhaust fumes

Two points:

1. Vetus has a new line of water lift mufflers - rated at a much higher temperature - I think Defender stocks most models - they are a bolt for bolt replacement and I believe worth the extra money - but they will not keep the exhaust hose from failing if the impeller quits.

2. The rapid failure of your replacement impeller may be caused by an air leak - if you stopped and started the engine several times, the engine might not re-prime if the sea chest or the water pump shaft is leaking air into the pump - a common problem. Some time these pumps are rebuildable, but often they require replacing. I'm not sure how to check the shaft for leaking, but you can check the sea chest by looking inside before you start the engine - if it is dry, you probably have a leak. This is especially true if your water pump is above the waterline.
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Old 27-12-2015, 10:48   #6
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Re: Massive amount of exhaust fumes

Had similar problem with an Alban Diesel(the engine, not the boat). Found the muffler clogged with many water pump impeller nubbies. Evidently a long standing problem with that cooling system.
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Old 27-12-2015, 10:54   #7
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Re: Massive amount of exhaust fumes

Just a silly question but when you added water to the strainer did you close the seacock until you had replaced the cap on the strianer so the system would not leak down?
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Old 27-12-2015, 11:32   #8
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Re: Massive amount of exhaust fumes

Was it exhaust fumes or smoke? smoke, what color? The limited view in the pic doesn't show much. what I can see of the hose and the water loc they don't look over heated. Fumes could be just bad fuel. smoke on the other hand? Well what color is it? Could guess ten thousand things. It'd be better to have a little more info., before you start replacing parts.

Smoke or fumes
running temp of the engine
age of fuel
ability to attain rated rpms
State of fuel filter
put your hand in the exhaust out flow, is it excessively oily?

the answers to those would help trouble shoot your problem, both the impeller and the exhaust. the questions on the impeller thread would need to be answered too.
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Old 27-12-2015, 11:42   #9
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Re: Massive amount of exhaust fumes

Its too bad you didn't worm in there a little further and find the hole. I could be the waterlock, but it could be the exhaust hose or a hole in the mixing elbow. What kind of engine??
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Old 27-12-2015, 12:01   #10
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Re: Massive amount of exhaust fumes

Sounds to me like it's "eating" sea life, crustations, fish, etc. You might want to use a water hose off the dock and blow back thru the thruhull to clear it out. Folded over vanes are a sure sign of this.
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Old 27-12-2015, 17:11   #11
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Re: Massive amount of exhaust fumes

Check the cover plate of the RW pump. Could be worn or damaged by the impeller failure & not pumping well. Also check the walls of the impeller housing & the cam plate for wear/damage.

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Old 28-12-2015, 09:18   #12
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Re: Massive amount of exhaust fumes

Slightly off topic, this thread resurrects one of my concerns about our beloved diesels. The cooling systems seem to be perhaps the most fragile part of the system. I've wondered why an air cooled radiator system, as used for most auxiliary generators, isn't used for the main power plant. Likely a silly question that's been answered a thousand times, yet I haven't found the clear and simple answer so far.
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Old 28-12-2015, 10:03   #13
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Massive amount of exhaust fumes

Quote:
Originally Posted by td0tz View Post
Slightly off topic, this thread resurrects one of my concerns about our beloved diesels. The cooling systems seem to be perhaps the most fragile part of the system. I've wondered why an air cooled radiator system, as used for most auxiliary generators, isn't used for the main power plant. Likely a silly question that's been answered a thousand times, yet I haven't found the clear and simple answer so far.

Show me a place to put a radiator for either a generator or a main engine on a Sailboat.......


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Old 28-12-2015, 11:18   #14
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Re: Massive amount of exhaust fumes

Quote:
Originally Posted by td0tz View Post
Slightly off topic, this thread resurrects one of my concerns about our beloved diesels. The cooling systems seem to be perhaps the most fragile part of the system. I've wondered why an air cooled radiator system, as used for most auxiliary generators, isn't used for the main power plant. Likely a silly question that's been answered a thousand times, yet I haven't found the clear and simple answer so far.

Air cooled radiators are on some boats, mostly commercial. However, the majority of boats with radiators have dry stack exhausts systems, which are quite loud. If you are going to water cool the exhaust, then why not use the same water for cooling the engine via a heat exchanger?
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Old 28-12-2015, 14:18   #15
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Re: Massive amount of exhaust fumes

Used to be the Shrimpers in the Panhandle of Fl would use a Dodge truck Cummins motor, radiator and all. I'm sure it was solely because the could be had cheap out of junkyards, but if you can make a pickup quiet, you can make it quiet in a boat, just wet stacking is so much easier and safer due to low temps, but I doubt you'll find a wet stacked commercial boat of any size.
No radiator is I'm sure because your surrounded by all that water, why not use it?


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