Dynon D180 tachometer on Jabiru 3300 reading low

PeterThomson

New Member
Joined
Aug 9, 2010
Messages
12
Location
Thailand
This is set correctly on the alternator wire, and at 6 pulses.

It has been reading a few hundred RPM under the actual engine RPM.

Now it also peaks at the low level, and then drops off by another few hundred RPM.

What is happening here ?
 
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