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Go Back   SailNet Community > On Board > Gear & Maintenance > Engines > Diesel > Volvo MD5B vibration. RPM sweet spot?
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Diesel This is a forum dedicated to diesel engines and their applicable accessories.


Thread: Volvo MD5B vibration. RPM sweet spot? Reply to Thread
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Topic Review (Newest First)
03-29-2013 11:56 AM
itsaboat
Re: Volvo MD5B vibration. RPM sweet spot?

Never mind. After looking at some MD5 vids on Youtube, that seems to be the nature of the little beast. I'll still check the old engine mounts though.

It's ironic to me that we sailors, who value the quiet of sailing, have such loud stinky aux power units in our boats
03-29-2013 10:45 AM
itsaboat
Volvo MD5B vibration. RPM sweet spot?

Our little 1985 7.5 horse MD5B runs smoothly at around 1000 RPM and 1500-2000. At other speeds, it vibrates. I mean vibrates. Under 1000 RPM it shakes the door to head loudly enough to drown conversation. Not to mention making the wife uncomfortable. This is all while in neutral.

I'm familiar with engines in general, but not so much diesels. Is this vibration normal in these single cylinder engines? I am suspecting engine mounts first, but are there other things I should look at?

 
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