Polarizing the generator-‘46 Mercury

[Bruce_MO]

Restoring a ‘46 Merc and have installed a rebuilt generator on the 59a motor, along with a NOS voltage regulator from Southside Obsolete. The instructions that came with the regulator said to polarize the generator by momentarily jumping the ARM and BAT terminals at the voltage regulator. Would that get the job done? I’ve seen videos on how to polarize the generator with the generator on a bench… does it need to “motor” to polarize, or is just a current flow enough? I’d prefer not to undo the fan belts. Thanks