This SAE Standard describes guarding to help prevent hazardous machine movement caused by activation of the starter motor by bypassing the starter control system. This document is applicable to off-road, self-propelled work machines, as identified in SAE J1116 and Agricultural Tractors as defined in ANSI/ASAE S390 which have the potential for hazardous machine movement as a result of bypassing the starter control system and powering of the starter motor.