The Chainsaw Oil Pump Assembly with Plunger Diaphragm offers a reliable lubrication solution for your reliable chainsaw, model number 009, 010, 011, or 012. This replacement part, part number 1120-640-3100 0000-997-0610, ensures efficient and safe operation of your chainsaw. The plunger diaphragm provides the perfect pressure control needed for a smooth and powerful chainsaw performance. With a multi-stage design, this pump assembly ensures efficient oil transfer, even in the toughest terrains. Don't compromise on the performance and safety of your chainsaw, choose the Chainsaw Oil Pump Assembly with Plunger Diaphragm today.