High torque, permanent magnet, gear reduction starter for Mercruiser, OMC and Volvo. 1.7KW starter will replace 9 tooth drive OEM versions for 3.0-8.1L with 14" flywheel. Clockwise rotation, staggard bolt pattern. Mounting bolts included. Uses SW450 solenoid, MBK450 bolt kit (included) and BH450 brush holder.