Roto Start 2 System (for nitro star F/G Series Engine

Start your vehicle quickly and easily with the Roto Start 2. To protect your engine, the Roto Start 2 features a built in circuit breaker which cuts off in case of an overload (e.g. a flooded engine).This HPI Nitro Roto Start 2 system is for the F & G series engines that use a 14mm One-Way Bearing.The G3.0 engines #15105 & #101310 use a 12mm One-Way Bearing. For these engines, change the bearing to #107829.Not Included:Requires a 7.2V NiMH stick battery pack for operation.