If it has a Bosch rotary injection pump, as my new 35-2 with VW diesel does, the fuel supply is held open with a solenoid. Cut power to the solenoid (generally wired to the ignition on switch) and the engine stops (assuming it is running on fuel, and not oil vapour through the intake... In an emergency, this solenoid can be held open with a 9V battery, although I don't know how long it would last.
On Wed, May 1, 2019 at 8:30 AM Charlie Nelson via CnC-List < cnc-list@cnc-list.com> wrote: > Hey Chris; > > +1 to comments thus far--you need to find out what or how your diesel > shuts down. I suspect that somewhere on it is a lever which allows you to > manually cut-off the fuel supply when all else fails. > > My Beta has a shut-off button which activates a solenoid to close the fuel > off--and this solenoid requires power. In the event this power is not > there, there must be an alternative to stop the engine. > > I found this out recently when the button failed (unknown reason) and I > could not stop the diesel--not a good place to be! Fortunately, while > messing around behind the button, I managed to short the button and the > engine stopped. I have since learned where the engine emergency fuel > shutoff is located, which is spring loaded and on the high pressure side of > the fuel supply on the engine itself. > > I was about to use the fuel shutoff on the fuel lines from the tank but > this can be time consuming as the engine/ fuel filter/Racor water > separator/fuel lines store a fair amount of fuel and the engine keeps going > and going and ... > > > Charlie Nelson > Water Phantom > 1995 C&C 36XL/kcb > > > > -----Original Message----- > From: Gary Nylander via CnC-List <cnc-list@cnc-list.com> > To: cnc-list <cnc-list@cnc-list.com> > Cc: Gary Nylander <gnylan...@atlanticbb.net> > Sent: Wed, May 1, 2019 11:13 am > Subject: Re: Stus-List Yanmar SB8 shut off > > My QM15 has a compression release pull cable, but in the 25 years I have > owned it, shutting the throttle all the way down shuts off the fuel and it > quits. After a diesel is running, the only way to stop it is to block air, > fuel, or compression, the electronics are no longer in use, thus the fuel > seems to be the most logical. > > Gary, QM15, 1980. > > *From:* CnC-List <cnc-list-boun...@cnc-list.com> *On Behalf Of *Josh > Muckley via CnC-List > *Sent:* Wednesday, May 1, 2019 10:57 AM > *To:* C&C List <cnc-list@cnc-list.com> > *Cc:* Josh Muckley <muckl...@gmail.com> > *Subject:* Re: Stus-List Yanmar SB8 shut off > > I am very familiar with the gm/hm/ym/qm series engines... Not so much with > the SB8 series. > > That being said, whatever actuation method is employed, it is best for the > fuel to be shut off to kill the engine. If there is a fuel solenoid - > fine. If there is a throttle actuator that goes below idle - fine. > Ultimately you want the engine to be starved of diesel fuel. What you > don't want is to regularly kill the engine by obstructing the air or > eliminating the compression. These methods allow fuel to collect and > linger on the cylinders after shutdown. > > Check your engine to see what is being activated to shut it down. If it > is fuel related then you're probably fine leaving it as is. > > Josh Muckley > S/V Sea Hawk > 1989 C&C 37+ > Solomons, MD > > > > On Wed, May 1, 2019, 10:43 AM Chris Graham via CnC-List < > cnc-list@cnc-list.com> wrote: > > Hi Listers! > > Probably a dumb question but in my research I have encountered a variety > of opinions about shutting down the SB8. > > The previous owner had disconnected the kill switch and just used the > ignition to shut the engine down. I have always used the kill switch on all > my diesels and this concerned me. Any opinions out there on this subject? > Should I reconnect the cable or is it fine to just use the ignition to turn > the engine off? Any concerns about doing damage to the engine or > electronics using this method? > > Thanks so much! Approaching launch date but still some projects to > complete! > > Chris Graham > 1978 C&C 26' > Papillon > _______________________________________________ > > Thanks everyone for supporting this list with your contributions. Each > and every one is greatly appreciated. If you want to support the list - > use PayPal to send contribution -- https://www.paypal.me/stumurray > > _______________________________________________ > > Thanks everyone for supporting this list with your contributions. Each > and every one is greatly appreciated. If you want to support the list - > use PayPal to send contribution -- https://www.paypal.me/stumurray > > _______________________________________________ > > Thanks everyone for supporting this list with your contributions. Each > and every one is greatly appreciated. If you want to support the list - > use PayPal to send contribution -- https://www.paypal.me/stumurray > > -- Shawn Wright shawngwri...@gmail.com
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