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Old 10-27-2015, 04:08 PM   #1
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Default 2700se performance

Help got a maxum 2700se with cummins mercruiser type d 4.2l 250 will not rev over 3000 rpm under load but in netural 5000 rpm when purchased in june was doing easy 24 knots now can not get above 10 have had all new fuel plus filters checked all lines changed map sensor had number 1 injector checked serviced and replaced including wiring to injector I am now running out of ideas please can any one help ?
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Old 10-27-2015, 04:54 PM   #2
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Have you checked the bottom for marine growth as it can greatly reduce performance. Any change to the prop; resize, damage?
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Old 10-27-2015, 05:42 PM   #3
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All been anti foul in June dual prop is fine marine company I have been using is now suggesting changing harnesses and ecu at a cost of a couple of thousand i just cannot unless this can definitely be the problem
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Old 10-28-2015, 11:31 AM   #4
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I do not know much about this engine, since it has an ECU can the mechanic read out error codes?
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Old 10-28-2015, 07:12 PM   #5
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Yes it came up with number 1 injector had it removed and serviced and replaced , fault code removed still boat no different I am totally lost for any more information
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Old 10-28-2015, 10:17 PM   #6
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Not many diesel owners on this site, have you tried mercruisers online help?
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Old 10-29-2015, 07:09 AM   #7
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No I haven't but will do anything is worth a try thanks
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Old 10-29-2015, 11:11 AM   #8
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Quote:
Originally Posted by julian bussell View Post
No I haven't but will do anything is worth a try thanks

Best of luck and post back when you find the solution.
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