tachomerter fluctuation on high rev.

[bdirdal]

I have the left wire from ems connected to the alternator on a Jabiru 2200 engine. The tach. works fine up to 15-1600 rpm but then start jumping up and down from 1600 to 2500 rpm.
Would an resistor sort this problem? (if so, what size)
Regards
Borge

 

[jakej]

I've had great success with the 3300 engine using same resistor as for the Lycoming - despite being told you don't need them for the Jabby :

Try that or a lower value resistor - you won't 'hurt' it.

It's all to do with the 'dirty' current out of the alternator.


Jake J

 

[bdirdal]

I've had great success with the 3300 engine using same resistor as for the Lycoming - despite being told you don't need them for the Jabby :

Try that or a lower value resistor - you won't 'hurt' it.

It's all to do with the 'dirty' current out of the alternator.


Jake J

What size resistor is that?
Regards
Borge

 

[dynonsupport]

It's a 30K resistor.