This list has been through the "don't put your hand over the intake" discussion in the past. There is a fear of losing skin and fingers and palms. I can say from experience that the suction really isn't extreme and the engine dies quite quickly. Maybe a valid concern on a bigger engine but on our little engines it is a quick failsafe way.
Josh Muckley S/V Sea Hawk 1989 C&C 37+ Solomons, MD Yanmar 3HM35F On Aug 11, 2015 10:55 PM, "Rick Brass via CnC-List" <cnc-list@cnc-list.com> wrote: > How many hours do you have on the engine? The sort of runaway you describe > does happen rarely, but the piston rings have to be worn to near the end of > their life (say 8000 to 10000 hours) or you need to almost completely fill > the block with oil to the point oil leaks out the dipstick tube. > > > > And never put a rag in the air intake. The suction of the diesel will just > suck the rag into the intake manifold and valves (which is really no biggie > since you will need to rebuild the head anyway when you rebuild the block > after you get it to shut down from a runaway condition). Whatever you do, > don’t put your hand over the air intake for pretty obvious reasons. It is > best to use a flat metal object like a pie plate or a saucepan from the > galley to cover the air intake. No airflow + no compression = engine shuts > off. > > > > Rick Brass > > > > *From:* CnC-List [mailto:cnc-list-boun...@cnc-list.com] *On Behalf Of > *Jean-Francois > J Rivard via CnC-List > *Sent:* Tuesday, August 11, 2015 11:50 AM > *To:* cnc-list@cnc-list.com > *Cc:* Jean-Francois J Rivard <jfriv...@us.ibm.com> > *Subject:* Stus-List 3GM30F Oil Pressure warning > > > > Hi Rob, > > I was told by more than 1 mechanic to be very careful about never > over-filling the oil in my 3GM30F.. In fact they recommended keeping it > between the middle and about 2/3 full level on the stick. The reason for > that is to avoid a run-away engine condition.. > > Apparently the excess oil can get splashed by the piston skirts and > somehow make its way into the combustion chamber / burn away without > throttle control. I was even advised to keep a rag handy near the engine > to stuff it into the air intake and stop it should all else fail.. > > I am not speaking form experience, but I was told it happens more often > than one might think. > > Best regards, > > -Francois Rivard > 1990 34+ "Take Five" > Lake Lanier, GA > > >> Mike: > > >>Along the line(s) of what Rick was saying about oil levels, I'll add > >>this. My Yanmar 2GMF manual says to put 2 litres of oil in the > engine > >>after an oil and filter change.....the 2 litres will bring the oil > level > >>on the dipstick to the full mark only if I use a Yanmar oil filter, > >>which is quite small. > > >>I use a NAPA 1064 Gold Seal oil filter which is larger than the Yanmar > >>is and obviously size and 'volume' of oil it can handle. Therefore, I > >>need more than 2 litres when I use the NAPA filter to get the dipstick > >>to read full How much more exactly?......I haven't measured it > >>exactly.....I just add the extra oil beyond the 2 litres until the > >>dipstick reads full.....more often than not since I am not exactly > >>measuring the extra oil beyond the 2 litres, the dipstick reads > slightly > >>above the full mark. After reading all these comments about oil > levels > >>in the marine engines, I don't think I will fret about the oil level a > >>little above the full mark. > > >>Just something else to think about. > > >>Are you back at the club? > > >>Rob Abbott > >>AZURA > >>C&C 32 -84 > >>Halifax, N.S. > > _______________________________________________ > > Email address: > CnC-List@cnc-list.com > To change your list preferences, including unsubscribing -- go to the > bottom of page at: > http://cnc-list.com/mailman/listinfo/cnc-list_cnc-list.com > > >
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