Did you mean zero for RPMs? I notice you live pretty far north - what's the temperature up there? And, how's your battery/charging circuit? (You can monitor battery voltage on the Gryphon - it usually reads above 14.0 volts if things are ok). The Gryphon is known to exhibit display problems under conditions of low temperature and low battery voltage. If you have the two in combination, it's a double whammy.
- Jack
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