It may be the bearings in the gauge not being lubricated well enough.
It's a major pain to pull them and drop in a little oil but that may be
what it needs. I had a similar problem with my speedometer for a while
but it seems to have cleared itself.
I didn't find any batteries inside my dashboard.
I did the following thing: http://home.online.no/~st-arhol/enge32speedo.htm
I replaced all electrolytic capacitors (6 in total), one measured bad the
one close to the orange capacitor/transistor, not at the regulator.
It has not happended yet, so if it won't happen again troughout the winter.
It's the fix.
Best regards for the response!
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