Yes, you can do that. The pump turns counterclockwise. It takes a powerful drill to push the oil. An old slow rpm 1/2 inch drill has worked for me. It would probably be a good idea to also remove the plugs, squirt motor oil in each cylinder and then with a rag over the spark plug hole give each a blast of compressed air to spread the oil in the cylinders. If you do lube the cylinders--be prepared for a few minutes of heavy smoke when it does fire up. Good luck--bringing a sleeping motor back to life is always exciting. -- Dave