The Dynatron Starter. Every RC modeler knows about The Dynatron starter. It is considered a field essential by most and instantly tames stubborn engines into submission with its amazing starting power. The most powerful Sullivan 2.50″ starter. Features a machined aluminum drive cone with pulley groove, 2.50″ diameter steel body and gold end caps. 12 or 24 VDC operation, maximum 80 amps. 340 in-oz (240 N-cm) of stall torque at 12V, 680 in-oz (480 N-cm) at 24V. 4800 no load RPM at 12V, 9600 no load RPM at 24V. For most engines up to 2.4 cubic inches (40 cc). No. S603.