Hi, I am not familiar with that brand but usually, (stress usually) that style head will be brushless and internally regulated and outside of burnt windings little goes wrong with them but when left to sit for a very long time they will lose the residual magnatism they need to power up which can be restored with an ordinary electric drill. If you know how to wire it for 110 output temporary a receptical. Plug a drill in pull the trigger and spin it backwards. Some report results spinning with fingers but I've had better luck with two drills. One plugged in to the generator and spin it with another drill via a rod chucked in both. it can also be done with a 12v battery but somebody better schooled than me will have to tell you how to do it that way. They also have to be nearly up to speed to start generating,, half speed won't do it.