Well said Terry...well said. -- When security matters. http://www.secure-my-email.com On May 15, 2013 6:06 PM, "Terry" <tj...@comcast.net> wrote:
> Fred, the older Yanmars have a reciprocating dingle valve to control > the exhaust temperature in the fluval chamber. As you have already noticed, > once the engine warms up, the dingle valve opens and lets the hot engine > exhaust pass through the fluval chamber removing any excess unburned fuel. > The newer engines have replaced the dingle valve with a resonating bundle > arm so they don’t smoke even when just started. > > Hope this helps...T > > *From:* Fred Hazzard <fredhazz...@spiritone.com> > *Sent:* Wednesday, May 15, 2013 2:54 PM > *To:* cnc-list@cnc-list.com > *Subject:* Re: Stus-List Overheating due to plugged knuckle > > > Rick:**** > > **** > > My 1986 4 cyl Yanmar smokes a bit when first started. After about 5 mins > of motoring at about ¾ throttle it smokes very little. An thoughts from > your experience with these Yanmars? I have no idea of the hours as the > hour meter was broken and showing 1100 hours when I bought the boat in > 2007. This engine starts very easily and runs well.**** > > **** > > Fred Hazzard**** > > S/V Fury**** > > C&C 44**** > > Portland, Or**** > > **** > > *From:* CnC-List [mailto:cnc-list-boun...@cnc-list.com] *On Behalf Of *Rick > Brass > *Sent:* Wednesday, May 15, 2013 6:38 AM > *To:* cnc-list@cnc-list.com > *Subject:* Re: Stus-List Overheating due to plugged knuckle**** > > **** > > Russ is correct. With proper care, clean fuel, regular air cleaner > changes, etc. 10.000 hours is attainable. In the forklift business, we > routinely saw 16,000 or so hours out of the 4 cylinder Yanmars we used in > the smaller trucks.**** > > **** > > Regarding the cost of an injector service, The last injector service on my > previous engine (PO saved $300 on the exhaust installation, and cost me $8k > for a replacement engine) was about $275 for four injectors.**** > > **** > > **** > > Rick Brass**** > > Washington, NC**** > > **** > > **** > > **** > > *From:* CnC-List > [mailto:cnc-list-boun...@cnc-list.com<cnc-list-boun...@cnc-list.com>] > *On Behalf Of *Russ & Melody > *Sent:* Tuesday, May 14, 2013 11:19 PM > *To:* cnc-list@cnc-list.com > *Subject:* Re: Stus-List Overheating due to plugged knuckle**** > > **** > > Hi Don, > > The black junk that plugs the mixing elbow can certainly be unburned > carbon from a bad injector. A Yanmar that has only 1800 is a long way from > the 5,000 hours you can get from an abused one these puppies. 10,000 hours > is attainable with decent care. It probably just needs servicing, not > replacing or a rebuild. > > My advice is get a guy to remove the injectors and bring them up to > Nanaimo to have 'em serviced/rebuilt by Floyd at Action Fuel Injection. He > is the best diesel fuel system dude on Vancouver Island. I think the latest > guess is $100 - 150 per injector... but maybe phone Floyd for a chat. > > Cheers, Russ > *Sweet *35 mk-1 > > At 10:28 AM 14/05/2013, you wrote:**** > > Hi Kim > > Thanks for this. It is what I'm worried about. The boat has started to > blow extra smoke on start and I'm thinking unburned diesel. It also blows > smoke when you idle down for a bit and then rev up again. Once warmed up > it > seems fine. I've got a mechanic coming in a couple of weeks (they are > backed > up here in Victoria). > > What I worry about is the slippery slope on an old engine. It is 1981 with > around 1800 hours and raw water cooled. It runs fairly nicely but..... I > also worry about the cost of a new engine which would not materially change > the value of the boat - as people were saying earlier - boats cheap, parts > expensive. > > How many boat units did getting the injectors cost if you don't mind > sharing. > > Don > > -----Original Message----- > From: Kim Brown [mailto:kimcbr...@comcast.net <kimcbr...@comcast.net>] > Sent: May-13-13 2:50 PM > To: cnc-list@cnc-list.com > Subject: Stus-List Overheating due to plugged knuckle > > > Don > Just went through this with my 3GMF30. Had Diesel Dan (really) out because > we are headed to the Abacos next month. (anyone going to be there for > Regatta Time?) I was suspicious of injectors- boat was running but xtra > smoke on start, oily exhaust water. So better here than there. Had the > injectors rebuilt and as part of the looksie he checked elbow and assorted > other potential trouble spots. The knuckle was almost closed with gunk and > was replaced. Never did overheat but that may be more because there is flow > tapped off for my dripless allowing some flow to continue besides the > meager > amount still passing through the knuckle. The injector rebuild really > worked > wonders- thought it was running ok before but now smoke is minimal, pops > right off, runs cooler and smoother. My guess is the gunk was unburnt fuel > building up. Your mileage may vary but that is another path to explore..... > I had replaced the elbow about a year ago and the knuckle was fine then so > it built up relatively quickly. And I haven't sucked an impeller lately (on > my FWC the vanes hang up at the front end of the heat exchanger and are a > PITA to extract). > > Kim Brown > Trust Me 35-3 > > > ____________________________________________________________________________ > > Message: 3 > Date: Mon, 13 May 2013 10:44:51 -0700 > From: "Don Jonsson" <dbjons...@shaw.ca> > To: <cnc-list@cnc-list.com> > Subject: Stus-List Overheating due to plugged knuckle > Message-ID: <003f01ce5001$9250c7c0$b6f25740$@ca> > Content-Type: text/plain; charset="us-ascii" > > Hello all > > > > I have an elderly Yanmar 3GMD engine that is raw water cooled. It has > plugged twice in the last two years where the water goes through a knuckle > into the mixing elbow. The first time (summer before last) was some solid > bit that had gotten stuck - how it got there I don't know. The last time > (last week) was due to a tar like substance gumming up the knuckle. Easy > to > clear and I was on my way, but is this a harbinger of something more > serious. > > > > I took the mixing elbow off a few years back and cleaned it, guess it is > time to do that again. > > > > Is the plugging coming from the exhaust and working its way into the > knuckle > - for example unburned diesel? > > > > Thanks for any insight. > > > > Don > > > > > > > _______________________________________________ > This List is provided by the C&C Photo Album > http://www.cncphotoalbum.com > CnC-List@cnc-list.com**** > > ------------------------------ > _______________________________________________ > This List is provided by the C&C Photo Album > http://www.cncphotoalbum.com > CnC-List@cnc-list.com > Terry Johnson > S/V Ozymandias > E-mail: tj...@comcast.net > Website: www.tj622.com > > _______________________________________________ > This List is provided by the C&C Photo Album > http://www.cncphotoalbum.com > CnC-List@cnc-list.com > >
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