I usually ground the F terminal to the generator housing and apply battery voltage to the ARM terminal while the generator is clamped in a vise. Connect the battery ground to the housing, or just clamp the end of a cable under the vise jaw that's holding the generator. Sometimes it's necessary to give the pulley a little spin to get things started. Don't run one long that way (15 seconds or so is plenty), as it can overheat the windings.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!