[c350ia] RE: Oil/Diesel

Tue, 6 May 2008 18:28:58 +0000

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Just a quick follow up and question from my earlier post.
=20
It turns out that the oil was a small container of used oil in the rear loc=
ker near the pedestal (it took some finding)that had leaked and eventually =
made its way down to the bilge....hmmm!
=20
But the dripless packing gland is slightly disconcerting. It will drip appr=
ox 1/2 teacup of water in a half hour of running. I defered to a specialist=
 and he took one look and recommended replacement. Not immediately, as it d=
oes not leak when standing/not running, but it needed a haul out etc etc.
=20
Interesting to me was the comment that the bellows was under a lot of compr=
ession force, more than desireable and that since it was the smallest size =
fitted and in the small space available in a 350, I was looking at the limi=
ts constrained by the boat design.
=20
The cause of the leak was that the carbon/steel interface started to wear u=
nevenly and that typically a little more pressure would assist but since th=
e bellows was compressed a lot as is, then nothing could be done. I was als=
o advised that I might want to look at a traditional packing gland or some =
kind of hybrid setup as an improvement when I do replace it.=20
=20
I have an early boat, hull 69, 2003 with 180 hrs on the engine, it is in th=
e water year round. I have nothing to make a comparison to but am suprised =
that 200hrs/5 years seems to be the upper limit.
=20
OBTW When I mentioned this later to a seasoned sailor he mentioned anecdota=
lly that more than 50% of boat losses are packing gland failures and that i=
f it lets go, no bilge pump can clear at the rate of the ingress. Food for =
thought.
=20
Any comments/advice?
=20
JC
=20
=20

From: snurdle@hotmail.comTo: c350ia@catalina350.net; c350@list.sailnet.netS=
ubject: Oil/DieselDate: Wed, 16 Apr 2008 17:22:23 +0000

Hi all, Using my boat last week I noticed for the second time a small amoun=
t of dark liquid sat on water behind the rear of the engine (teaspoonful). =
I am thinking that a small amount of water may be leaking back that the dri=
pless packing gland, but the oil is a mystery. If I look in through the sma=
ll door in the aft cabin at the port rear side of the engine, the oil is be=
hind (more towards the stern) the small lip of fibreglass under the rear of=
 the engine. I have a oil pad under the engine pushed up to this lip, and i=
t is clean, and have also removed the rear mattress and cover and looked at=
 the prop shaft and rear of the engine and everything is clean.` I can appr=
eciate that a little oil goes a long way, and have noticed that there is ap=
proximately a tablespoonful of oil has made its way into the bilge where it=
 had taken a grey cloudy consistency and was floating on top of the small a=
mount of water always in the bilge. So it looks like I'm going to have a fu=
n weekend looking into this and before I do I was wondering if anyone has a=
 "been there done that" tale they can share with me regarding either the oi=
l or packing gland. I want to get on top of the problem myself only if it i=
s to understand it fully to pass along to a skilled engine tech for repair.=
 I cannot work from looking at the manuals, how oil (and this is engine oil=
 I think, not transmission fluid) can appear to be beyond the rear of the e=
ngine or what the path is for liquid between the prop and the bilge that do=
es not leave a visible trace.  Any ideas?

Have you played Fishticuffs? Get fish-slapping on Messenger=20
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Great deals on almost anything at eBay.co.uk. Search, bid, find and win on =
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Just a quick follow up and question from my earlier post. 
&nbsp; 
It turns out that the oil was a small container of used oil in the rear loc=
ker near the pedestal (it took some finding)that had leaked and eventually =
made its way down to the bilge....hmmm! 
&nbsp; 
But the dripless packing gland is slightly disconcerting. It will drip appr=
ox 1/2 teacup of water in a half hour of running. I defered to a specialist=
 and he took one look and recommended replacement. Not immediately, as it d=
oes not leak when standing/not running, but it needed a haul out etc etc.<B=
R>
&nbsp; 
Interesting to me was the comment that the bellows was under a lot of compr=
ession force, more than desireable and that since it was the smallest size =
fitted and in the small space available in a 350, I was looking at the limi=
ts constrained by the boat design. 
&nbsp; 
The cause of the leak was that the carbon/steel interface started to wear u=
nevenly and that typically a little more pressure would assist but since th=
e bellows was compressed a lot as is, then nothing&nbsp;could be done. I wa=
s also advised that I might want to look at a traditional packing gland or =
some kind of hybrid setup as an improvement when I do replace it. 
&nbsp; 
I have an early boat, hull 69,&nbsp;2003 with 180 hrs on the engine, it is =
in the water year round.&nbsp;I have nothing to make a comparison to but am=
 suprised that 200hrs/5 years&nbsp;seems to be the upper limit. 
&nbsp; 
OBTW When I mentioned this later to a seasoned sailor he mentioned anecdota=
lly that more than 50% of boat losses are packing gland failures and that i=
f it lets go, no bilge pump can clear at the rate of the ingress. Food for =
thought. 
&nbsp; 
Any comments/advice? 
&nbsp; 
JC 
&nbsp; 
 &nbsp; 
<BLOCKQUOTE>
<HR>
From: snurdle@hotmail.com To: c350ia@catalina350.net; c350@list.sailnet.=
net Subject: Oil/Diesel Date: Wed, 16 Apr 2008 17:22:23 +0000 
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Hi all, &nbsp; Using my boat last week I noticed for the second time =
a small amount of dark liquid sat on water behind the rear of the engine (t=
easpoonful).&nbsp;I am thinking that a small amount of water may be leaking=
 back that the dripless packing gland, but the oil is a mystery. If I look =
in through the small door in the aft cabin at the port rear side of the eng=
ine, the oil is behind (more towards the stern) the small lip of fibreglass=
 under the rear of the engine. I have a oil pad under the engine pushed up =
to this lip, and it is clean, and have also removed the rear mattress and c=
over and looked at the prop shaft and rear of the engine and everything is =
clean.` &nbsp; I can appreciate that a little oil goes a long way, an=
d have noticed that there is approximately a tablespoonful of oil has made =
its way into the bilge where it had taken a grey cloudy consistency and was=
 floating on top of the small amount of water always in the bilge. &nbsp=
; So it looks like I'm going to have a fun weekend looking into this and=
 before I do I was wondering if anyone has a "been there done that" tale th=
ey can share with me regarding either the oil or packing gland. I want to g=
et&nbsp;on top of the&nbsp;problem myself only if it is to understand it fu=
lly to pass&nbsp;along to a skilled engine tech for repair.&nbsp;I cannot w=
ork from looking at the manuals, how oil (and this is engine oil I think, n=
ot transmission fluid) can appear to be beyond the rear of the engine or wh=
at the path is for liquid between the prop and the bilge that does not leav=
e a visible trace. &nbsp; &nbsp; Any ideas? 
<HR>
Have you played Fishticuffs? <A href=3D"http://www.fishticuffs.co.uk/" targ=
et=3D_blank>Get fish-slapping on Messenger</A> </BLOCKQUOTE> <hr />Get=
 5GB of online storage for free! <a href=3D'http://clk.atdmt.com/UKM/go/msn=
nkmgl0010000005ukm/direct/01/' target=3D'_new'>Get it Now! </a></body>
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