Cummins 4BTA3.9-G Engine Spare Parts List The Cummins 4BTA3.9-G engine is a 4-cylinder diesel engine widely used for generator sets and industrial power applications. This spare parts list includes common maintenance parts, overhaul parts, fuel system components, cooling system parts, lubrication parts, and electrical parts. Quantities are listed based on one complete engine set. Common Maintenance Parts Part Name Part […]