High quality Perkins Perama M30 alternator 12V, 2-point / 3-point mounting 180 degree or 3-point Right Hand mounting, earth or insulate return, to fit marine engine code KD - 103.10. The adjuster arm securing bolt is at a 120 or 180 degree angle to the mounting arms as can be seen from the photos. These alternators take the earth (-) connection from the mounting to the engine block. Whereas the 'isolated earth' alternator requires a separate cable to supply an earth. Electrical output connections are for battery (+) and alternator warning lamp and an AC terminal for a tachometer.
For the alternators not supplied with pulleys the existing one can be re-used.
These alternators are supplied by official aftermarket manufacturers such as Prestolite, USA based and a world leader in automotive charging systems, or one of the BOSCH group of companies.