I owned a trawler with 2 320 HP Caterpillar 3208T engines. It had an engine room automatic fire suppression system using Halon In case of an engine room fire, and if the Halon system activated, there was an automatic shut down system that activated I believe it shut off the air intake somehow, since diesels can run on Halon injected into the air intake even if the fuel is shut off.
I think such a system is required by USCG and insurance companies where you have automatic Halon fuel suppression systems installed in an enclosed engine room. Simply shutting of the fuel will not stop the engine if the engine room is flooded with Halon or other similar HFCs. The fire will be extinguished (no oxygen) but a diesel will run with the Halon environment West Marine sells devices for this purpose--- see page 187 of their 2013 catalog. Don Wagner Der Baron C&C 41 CB ----- Original Message ----- From: Josh Muckley To: cnc-list@cnc-list.com Sent: Friday, May 24, 2013 9:37 AM Subject: Re: Stus-List Stopping a diesel Feeling the "suction" is a diagnostic method that will also kill the engine in short time. Though, as Rick said, an engine with leaking rings would not necessarily stop. Additionally, cracking the fuel supply fittings to the injectors while the engine is running is also a diagnostic method for determining a failed injector. 1 of 3 injectors and the engine runs rough. 2 of 3 game over. All that being said it would be safer and easier to pull the decompression lever(s). No compression...no diesel. Do this while its in gear and the thing stops almost instantly. Josh Muckley S/V Sea Hawk -- When security matters. http://www.secure-my-email.com On May 24, 2013 8:08 AM, "Rick Brass" <rickbr...@earthlink.net> wrote: I suppose the engine would stop, but it might be from the blood and tissue torn off your hand by the vacuum if the air intake. Seriously, it is a LOT of vacuum. Another ill-advised method of stopping a diesel is to put a rag over/into the air intake. The diesel stops, but then you need to rebuild the cylinder head to get the fabric parts out of the intake valves. Assuming the engine won’t shut off because the rings are badly worn and it is running on fumes sucked into the cylinder from the oil pan, the best alternative is to use a flat metal plate or something like a saucer from the galley to put over the air intake horn. I’m not sure what I would do with my Universal, which has a circular “can” full of “Brillo pad”-like metal screen for an intake filter. If the engine does not stop or is a runaway because of a problem in the fuel injection pump, the best thing to do is shut off the fuel using the shut off valve between the tank and your primary fuel filter. Or you could take a wrench and loosen the nut at the connection from the injection lines to the fuel injectors. If you have a leak there, the injectors stop working and the engine stops. I’d be reluctant to try that with engine running, belts whirling, pulleys spinning, and everything vibrating – but sometimes you do what you need to. Rick Brass Washington, NC From: CnC-List [mailto:cnc-list-boun...@cnc-list.com] On Behalf Of Josh Muckley Sent: Thursday, May 23, 2013 10:34 PM To: cnc-list@cnc-list.com Subject: Re: Stus-List Stopping a diesel Are we assuming a run away diesel? Why not just put your hand over the intake pipe? I assume that is where you are spraying "stuff". Josh Muckley S/V Sea Hawk _______________________________________________ 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
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