View single post by NigelK
 Posted: 12-12-2016 07:09 pm
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NigelK

 

Joined: 07-16-2014
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Thanks Brett. My next move, as suggested by Chris at Spiyda, is to install a relay wired so that the tacho is not energised during cranking. Chris thinks the wild needle bounce during cranking might be disturbing the balance weights in the tacho, with a knock-on effect on calibration. I'll try this out at the weekend and post the results...