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Hi Guys,
New to forum and need some help.
I’m hoping you can help me out with a problem I am experiencing with my boat engine, Cummins 6BTA 12 valve 5.9 M2 EP-9 injection pump. The problem I’m having is with the port engine which fires up without hesitation and runs great up to about 1800 rpm at this point I can continue advancing the throttle but there is zero response, this all happens under load. In the neutral position the engine functions normally and will rev up to 3000 rpm. The starboard engine performs normally and both are 1992 vintage with approximately 1250 hours on each. Has proper after coolers.
I acquired this boat in August of 2018 and the engine problem was present at that time so I am unable to give you any operational history. Here is the details of the engine:
ESN: 44724555
MARKETING MODEL NAME: B5.9M (300)
BUILD DATE: 02 MAR 1992
FUEL PUMP PART# 3919762
MARKETING ENGINE CONFIG. :D403017MM12
TECHNICAL ENGINE CONFIG. :D403017MX02
CPL# 970
300 HP @ 2800 RPM
The following has been done in troubleshooting this problem:
Primary fuel filter cleaned and element replaced
Engine fuel filter replaced
Pressure check of port lift pump taken after filter and before PE-9, 15 psi idle to 20 psi @ 2400
Pressure check of starboard engine produced identical results and it runs great.
1000 rpm under load at dock 15 psi both engines individually tested.
Over flow/return valve removed and cleaned, ball and spring seemed ok. Air bled from pump
Throttle linkage and function checked along with throttle stops, both stations normal (boat equipped with ZF Micro-Commander controls with synchronization)
12 volt trombetta shutoff valve removed and serviced per sbmarine how-to.
Shutoff arm checked and springs to run position when solenoid is retracted
Aneroid tube to intake manifold removed and checked
I was able to read the governor number on the starboard engine which showed Nippon Denso 190300-2950, I was not able to read the port do to position of the plate. (I am able to get it but will require substantial effort and it’s the same governor).
Engine is one of two in a 1993 Bluewater Costal Cruiser 5400 (BTTL54237J293) Trans TRM25A #225-625L Prop Federal EQVI Quad 24 dia. 26 pitch Heavy Cupped 1.5 bore.
Thanks in advance for your help. (I would bring the boat to sbmarine but a long trip from Ohio River mile 498!)
Dave
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