Cummins 6BTA5.9 M2

Author Message   Dave Fellowes Visitor Posted on Sunday, July 09, 2006 - 07:14 pm:    I currently looking at purchasing a vessel with twin 6BTA5.9 engines. These engines have 963 hrs each on the clock, no noises - appear to be in good condition. Question is, after starting the engines (2-3sec wind)and run for approx 15 min, both engine exhausts were still fuming. Did not appear to be oil coloured smoke - more fuel looking. Engine temperature at this stage was approx 50 C, oil pressure 65 psi. Is this normal for these engines to be like this at this temperature and then clear as reach operating temp or should they burn clear after initial start. Have not had the opportunity to take vessel for a run yet - hoping to arm myself with some knowledge prior. Any assistance on this matter would be appreciated.   Herb Ebel Visitor Posted on Wednesday, September 06, 2006 - 10:01 pm:    I am looking to purchase a Bayliner 3988 with 6BTA5.9M2 four cylinder Cummins. I have heard that this engine is under powered for the boat and if ran too hard it tends to blow the injectors. My mechanic says blow injectors generally lead to rebuilding the engine. Any feedback from current owners or mechanics with experience would be appreciated.   Dave Carnes Visitor Posted on Monday, October 22, 2007 - 02:24 am:    Dave: I have a similar engine with the same number of hours. I have the same smoking problem. From folks that I have talked to this is characteristic of the engine. Raw water pumps seem to be a problem. I bought the boat used and put a new pump in since it had a leak. In less that 200 hours the pump was leaking again. Cummins was not nice about backing for a new pump.}   Dennis Logan Visitor Posted on Sunday, February 24, 2008 - 01:08 am:    I have 6BTA5.9 engines with 1,000 hrs and they both smoke when cold. I spoke with a cummins mechanic and was told this is normal.   Liz Boyd New member Username: diversionb Post Number: 3 Registered: 10-2006 Posted on Monday, February 25, 2008 - 08:05 am:    We also have 6BTA5.9 engines, we have about 600 hrs and they do both smoke when cold. We have had this boat for a year now and have had no problems.   Matt Daniel Visitor Posted on Wednesday, April 23, 2008 - 06:14 pm:    Could anyone advise me as to the best practices for breaking in a new 6BTA5.9M2?   MistaHays Advanced Member Username: mistahays Post Number: 723 Registered: 02-2006 Posted on Tuesday, June 03, 2008 - 11:52 am:    You guys should start a new post with each topic, btw.

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