KAWASAKI ENGINE FS541V-AS37R 603cc 1-1/8 Dia. X 4-5/16 V Twin OHV 15HP. The item kawasaki engine fs541v-as37r 603cc 1-1/8 dia. x 4-5/16 v twin ohv 15hp. 12V Electric Start, 15AMP Alternator. X 4-5/16 V Twin OHV 15HP is in sale since Friday, January 8, 2021.