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Old 21-05-2022, 09:28   #1
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MD2030 slight change in revs
Occasionally after several hours of motoring I will notice a 100-200 rpm change( largely detected by ear ) followed a few minutes later by a return to the original rpm. It’s occasional maybe once in a day of motoring. There’s no stuttering or anything.

The filters are clean ( recently changed ) as far as I’m aware.

Anyone any ideas.
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Old 22-05-2022, 03:47   #2
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Re: MD2030 slight change in revs
Anyone with any similar experience
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Old 22-05-2022, 04:09   #3
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Re: MD2030 slight change in revs
I have the same engine and it happens to me sometimes. I have so many other problems that I have chosen to ignore this one
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Old 22-05-2022, 04:13   #4
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Re: MD2030 slight change in revs
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I have the same engine and it happens to me sometimes. I have so many other problems that I have chosen to ignore this one


I wonder if it’s just a funny characteristic of that engine and best ignored.
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Old 22-05-2022, 16:04   #5
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Re: MD2030 slight change in revs
Having your injectors cleaned or running some diesel purge through the engine might solve the issue.
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Old 22-05-2022, 23:23   #6
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Re: MD2030 slight change in revs
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Originally Posted by Scubaseas View Post
Having your injectors cleaned or running some diesel purge through the engine might solve the issue.


Good idea. Thanks I’ve a few long journeys coming up we’ll see how we get on
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Old 22-05-2022, 23:50   #7
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Re: MD2030 slight change in revs
Sounds like the alternator load have you got an acr ?
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Old 23-05-2022, 04:47   #8
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Re: MD2030 slight change in revs
Ive got two of those motors. Dont recall that instability, but plan on 6 + hours of running today. Will pay attention to weirdness.
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Old 23-05-2022, 15:47   #9
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Re: MD2030 slight change in revs
Tachs showed no unusual behavior today. Ran 2500 all day.
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Old 24-05-2022, 01:19   #10
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Re: MD2030 slight change in revs
My one didn’t falter yesterday either.
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