I"m having trouble starting my G. Tractor had a ford type solenoid on it with starter button when I got it. Did not change that (but will go back to original soon). Put all new cables on it and rebuilt starter two years ago. Solenoid is new. Charging system registers as charging, cut out relay not stuck. I get a hot positive ground cable when I"m trying to crank her over. Tried two different grounds, one to battery box, now I"m back to main bolt on tractor frame near shifter. I"m thinking maybe that a bad starter button might be the cause. Sometimes it will stick when depressed. Any thoughts?