[C320-list] Yanmar exhaust architecture

[Graeme Clark]

Timothy

Thats exactly why I wanted a photo or diagram (or even part numbers) , so I can get an idea of how the thing is put together following what would appear to be an early experiment on mine!

For example at what point of the exhast doe sthe water injection take place? Itr seems to me that the cooling water exits on the port sode of the engine and the exhaust on the starboard side, so some form of connection needs to be made between the two. The ‘standard’ Yanmar exhast injection elbow has the water entering the exhaust just a few inches from the engine block, i.e., really early; mine has the water enetering about 18 inches downstream, hence, presumably the need to lag the prt beforehand which receives no cooling effect!

Regards

Graeme



Message: 7
Date: Tue, 14 Oct 2014 20:27:53 -0400
From: Timothy Osburn <tosburn1958 at gmail.com>
To: C320-List at catalina320.com
Subject: Re: [C320-list] Yanmar exhaust architecture
Message-ID:
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I just had mine replaced last month and the mechanic was able to use off
the shelf parts. I have the same engine.
On Oct 14, 2014 5:37 PM, "Graeme Clark" <cg at skyflyer.co.uk> wrote:

> I have just transitioned from one/third shared ownership of hull #303 with
> a Westerbeke to sole ownership of hull # 366 which (I have been told) is
> one of the very first to be fitted with a Yanmar 3GM30F engine.
> 
> The exhaust arrangement/architecture is very different from the Westerbeke
> and I wondered if this was now ?standard? in all Yanmar engined 320s or has
> it been superseded with something else?
> 
> The exhaust is on the starboard side of the engine, so there is a length
> of lagged exhaust pipe as per this photo
> 
> http://i59.tinypic.com/244tch3.jpg
> 
> which then connects  to a section on the port side where the water is
> injected. The entire assembly looks a bit ?home made?!
> 
> If I have to replace the exhaust ?elbow? (in reality not an elbow at all)
> where do I get this piece or is it custom made by a fabricator.
> 
> If anyone else with a 3GM30F has a photo or diagram of the exhaust
> arrangement I?d be most grateful
> 
> Many thanks
> 
> Graeme,
> Britain