Just finished watching a video on generator repair. I've posted this guy's YouTube site here before. He's found a recurring issue with the newer B&D Storm Responder generators, and specifically called out Model # 30664. It's a popular generator, so just passing on info.
Specifically, poor quality control. The shrink tube on the connectors in the powerhead are too long and actually act as insulators for the power legs causing failures. He's also found missing tie-wraps on the connector block which can allow the connector to be sucked into the stator and destroy everything. If you have a newer Storm Responder generator, watch this video starting at 57:40 for the problem description. If you take the cover off your generator power head, look at the wire terminal block. If there is white nut lock with no lock washers, you may have an affected model.
Specifically, poor quality control. The shrink tube on the connectors in the powerhead are too long and actually act as insulators for the power legs causing failures. He's also found missing tie-wraps on the connector block which can allow the connector to be sucked into the stator and destroy everything. If you have a newer Storm Responder generator, watch this video starting at 57:40 for the problem description. If you take the cover off your generator power head, look at the wire terminal block. If there is white nut lock with no lock washers, you may have an affected model.