andrew phillips
Well Known Member
I have the plane power internally regulated alt on my IO-360. The voltage has started to vary between 10.2 and 13 volts. It goes up and down over about a 20 second period. This occurs during cruise flight conditions. I have tried playing with all the electrical stuff in the cockpit - no change. I looked under the cowl and all the connections seem tight. Bad ground was first thought but the time period and the repetitive nature of the problem are making me think that's not it. Battery is PC-680 1 year old and never given me a sign of any problems.