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Super Moderator
Re: Tach fluctuation
Sweep needle tachometers are notoriously inaccurate on Rotax engines. Both the two strokes and the 912 series.
I had a VDO and a Rotax tach in my old plane that were both terrible. I replaced the Rotax with a digital tach from ACS that was great. Spot on compared to an optical tach.
I have a Dynon panel in the Mangy. That checked perfect to the optical, too.
Av8r3400
Kitfox Model IV
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912UL 105hp Zipper
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