[C320-list] exhaust mixing elbow

[Jack McDonough]

We're in Tewksbury, Mass., but we sail out of the Jubilee Yacht Club in 
Beverly Harbor. We bought a 2003 Catalina 320 new after having a Cape Dory 
30 for a number of years. A fellow club member has a 2007 model that has 
many improvements over ours, including a different mast. We've had nothing 
but trouble trying to raise and lower our main. The sail cars either jam in 
the gate or fall out, negating the ability to raise the sail from the 
cockpit.

Jack McDonough
Sure Bet #947






----- Original Message ----- 
From: "Robert Seastream" <robert.seastream at comcast.net>
To: <C320-List at Catalina320.com>
Sent: Sunday, September 21, 2008 5:52 PM
Subject: Re: [C320-list] exhaust mixing elbow


> We're on one of four moorings off Hilton Park (just downriver of the 
> bridge over Dover Point) belonging to Great Bay Marine.
> That way we don't have to wait for low tide, which is the only time we 
> can squeak under that bridge.
> The run out to Portsmouth Harbor takes about an hour or less.  We  still 
> try going with a fair tide.
> You grew up in Dover?  Where are you these days?
>
> Bob Seastream
> Intuition # 906
>
> On Sep 20, 2008, at 7:45 AM, Jack McDonough wrote:
>
>> If you come down through Portsmouth Harbor, you must start in Great  Bay 
>> at Dover Point. (I grew up in Dover.) That's a long way in and  out, 
>> isn't it? And Great Bay looks to have some swirly currents. And  the 
>> current under those bridges in Portsmouth are swift, with a  capital S.
>>
>>
>>
>>
>> ----- Original Message ----- From: "Robert Seastream" 
>> <robert.seastream at comcast.net
>> >
>> To: <C320-List at Catalina320.com>
>> Sent: Friday, September 19, 2008 5:12 PM
>> Subject: Re: [C320-list] exhaust mixing elbow
>>
>>
>>> We have about an hour run to get downriver and out of Portsmouth 
>>> harbor to offshore.  We run at 2400 for fuel economy, 3000 if we  have 
>>> to hustle to make the bridge openings.  3200 is the  continuous max 
>>> rating for our Yanmar 3GM30F.  Once or twice a  year, I run WOT (3600 
>>> rpm; coincides with the one hour engine  rating) for about 15 minutes. 
>>> Never had 'smoke' issues, however  our engine only has about 300 hours 
>>> on it.  Engine temps range  from 160 to 180 degrees farenheit under 
>>> those respective conditions.
>>>
>>> Bob Seastream
>>> Intuition # 906
>>>
>>> On Sep 19, 2008, at 6:04 PM, Allan S. Field wrote:
>>>
>>>> We make sure that every time we run the engine, we run at 3,000  rpm 
>>>> for at
>>>> least 5 minutes.  600 hours and no smoke although we intend to  pull 
>>>> and
>>>> clean the elbow prophylactically this winter regardless.
>>>>
>>>> Allan S. Field
>>>> Sea Shadow - #808
>>>> Columbia, MD
>>>>
>>>> -----Original Message-----
>>>> From: c320-list-bounces at lists.catalina320.com
>>>> [mailto:c320-list-bounces at lists.catalina320.com] On Behalf Of  Crosby 
>>>> Roper
>>>> Sent: Friday, September 19, 2008 5:42 PM
>>>> To: c320-list at catalina320.org
>>>> Subject: [C320-list] exhaust mixing elbow
>>>>
>>>> Thought I'd pass this along for general lesson learned file. In  july 
>>>> on my
>>>> way back from Catalina island to San Diego, I noticed that when I   ran 
>>>> the
>>>> RPM's up to 3200, I got a bit of black/brown smoke from exhaust. 
>>>> Since water
>>>> tanks were full and there was a bunch of stuff on board, I figured 
>>>> probably
>>>> just overloading the engine was the problem. On my next trip to 
>>>> catalina on
>>>> Labor day, I noted smoke at 3000 RPM. To make a long story short,  the
>>>> problem progressed rap[idly over the next 30 hrs of engine use to   the 
>>>> point
>>>> where even at 2000 RPM i was seeing smoke. We limped back to the   slip 
>>>> and
>>>> called mechanic ( to whom I had spoken while in Catalina and who  had 
>>>> advised
>>>> me that problem was likely a clogged exhaust mixing elbow and OK  to 
>>>> run
>>>> engine at low RPM as long as it was not producing smoke.) He came   out 
>>>> on
>>>> Monday and problem was indeed exhaust mixing elbow. The engine is  3 
>>>> years
>>>> old and has about 220 hrs on it. He admonished me for not using  the 
>>>> boat
>>>> enough (in front of my wife, which should work out well for future 
>>>> sailing
>>>> schedule) and for babying the engine. So, for anyone else who  tends 
>>>> to baby
>>>> their diesel, run it frequently and run it hard. But we already know
>>>> that!Crosby Roper, VMD
>>>> Tethys # 1054
>>>> _________________________________________________________________
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>>
>