Yamaha G22A starts runs until I stop then won't start. Replaced Start/Gen, battery, voltage regulator, new key switch, new stop/go switch, new solenoid, charges at 15 volts. I drove ten miles parked two hours later drove back home stopped and would not restart. 4U8-02 relay would click but no start. Next day I could start stop ten times no problem in drive way drove a mile shut off no start?