External alternator kit comes with all necessary componenets
other than wiring. It allows the owner of a Rotax 912 to achieve extra
amperage for accessories (increases output between 35-40 amps). The external
alternator is driven by a pulley/belt setup which is attached to the standard
912 prop flange. We have also machined an extra belt groove in the prop
flange pulley which could be used for another belt driven device, such
as a vacuum pump. The complete assembly weights less than 9 lbs.