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I just finished my top overhaul engines runs nice , but while it was running i thought i would check to see if it was charging i put a tester on the battery and i got 13.6 volts , a good charge , then went back to check on CHT engine only had 20 mins on it , then i noticed the alternator wasent charging the red light was on and the EIS was not blinking all was normal , What did i burn out ?

The Jab won't start charging until you get at least 2000 RPM. Not sure about the Aerovee but I think its a similar system.

fastj22 wrote:The Jab won't start charging until you get at least 2000 RPM. Not sure about the Aerovee but I think its a similar system.

thats not it was charging 13.6 till i check it at that RPM

fastj22 wrote:The Jab won't start charging until you get at least 2000 RPM. Not sure about the Aerovee but I think its a similar system.

you where correct !! 2000 RPM

I never noticed dose the EIS red light blink till you get up to 2000 rpm and it is charging

SonexEZ wrote:

fastj22 wrote:The Jab won't start charging until you get at least 2000 RPM. Not sure about the Aerovee but I think its a similar system.

you where correct !! 2000 RPM

True for the older parallel connected alternator coils. A revision to series connected coils as per Jabiru bulletin, lowers rated output to 17 amps but charges starting at about 1,300 - 1,400 RPM. (The reason for the 17 amp rating, which does not seem logical based on simple math, has been discussed and debated at length on Jabiru forums.) I think new Jabiru engines come connected that way, and my CAMit 3300 on which I elected to have the old flywheel mounted alternator to save weight vs the CAMit standard 40 amp external alternator, seems to be connected that way. Note: If CAMit's current testing proves out, I will likely convert mine new external 15 amp alternator that is intended to save weight, charge at idle RPMs, improve damping and reduce stress on flywheel connection. 15 amp seems to be plenty with modern avionics and LED lighting.

David A. Sonex TD #1327 CAMit 3300 #0004

Now i have a red light and not sure why all parameters are good , But the engine has compleated its first hour test run , now need to change the oil .Any idears ?