Diesel engines can runaway using lube oil as fuel but it is more likely on engines with turbo chargers. The lube oil can leak through the turbo's bearing seals. Back when I was completing my merchant marine training, the engineering instructor showed a video of a 6-71 running away to destruction.
If you are ever faced with a diesel that will not shut down, the recommended response is to stave it for air by blocking the intake. Never use your hand. Less combustible materials that are handy in most boats will work. In a pinch use your wife's foul weather gear. It a great idea not to over fill the crankcase both for the runaway issue but also to reduce lube oil leakage, especially on older engines. For Calypso's Perkins I noticed and increase in oil leaks when I switched to a higher detergent oil and had a full crankcase. The leakage was less as the level dropped then went back to normal when I went back to Delo 100, a lower detergent oil. Martin Calypso 1971 C&C 43 Seattle ________________________________ From: CnC-List [cnc-list-boun...@cnc-list.com] on behalf of Jean-Francois J Rivard via CnC-List [cnc-list@cnc-list.com] Sent: Tuesday, August 11, 2015 8:50 AM To: cnc-list@cnc-list.com Cc: Jean-Francois J Rivard 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
