Crankshaft 3917320 of Cummins 6CTA8.3-M188(SO21992) Marine Engine NO. PART NUMBER PART NAME NO. PART NUMBER PART NAME 1 3917320 Crankshaft, Engine 4 3944158 Bearing, Main 2 3918776 Gear, Crankshaft 5 3944163 Bearing, Crankshaft Thrust 3 3904483 Dowel, Pin 6 3944153 Bearing, Main Remarks: (1) We can provide Crankshaft 3917320 engine parts, as well as 6CTA8.3-M188 genuine Cummins engine. (2) Above …