I've got a service manual on a Honda EG1400 and if no AC voltage it indicates to check for 12v DC at the brushes. (with the engine running at 3700 rpm's) If it has 12vDC check the condition of the brushes and slip rings and also check the rotor resistance as around 15-18 ohms reading across the slip rings with one brush lifted.
It indicates if the unit has 12vDC at the brushes and the rotor checks ok to excite the gen by connecting a 12v battery to the brushes and of correct polarity. (I lift one brush and use a 9v transistor radio battery.)this re-excites the rotor if it has lost it's magnetism due to long term storage.
As the guys on here suggests you need to try the electric drill method as a safer method and remain aware that the drill will start spinning immediately if the gen excites.
You might try looking for a site on-line called SMOKSTAK and posting in the generator section also.