D180, tacho zero revs on start up. OK on restart

shane

New Member
Joined
Jun 10, 2010
Messages
5
DYNON 180 and Jabiru 430 (3300 6 cylinder )
Working fine for 6 years.

Problem yesterday, started up to taxi from grass tie down to the fuel, tacho was not working ( showed the figure zero ).
Refueled.
Started up again, and tacho now working fine.
On the taxi back to parking I noticed every thing seemed ok electronics wise, Dynon 180 showed 12.5 volts which increased to 13 volts on reving up, and ditto amps went from zero to about 6 on reving up (to about 1500 revs ).
I am worried, cannot rely on arriving at airport for a flight and not getting airborne.
 

dynonsupport

Dynon Technical Support
Staff member
Joined
Mar 23, 2005
Messages
13,226
We pick up the RPM from a Jabiru from the alternator. Given that both your RPM and voltage are acting up, I would guess your alternator or voltage regulator is failing.
 
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