Become accustomed to checking the chain, bar, sprocket, and other parts for rust ... ignites the fuel-air mixture in the engine cylinder, powering the chainsaw engine. A damaged spark plug ...

According to Nancy Egelhoff of Egelhoff Lawnmower Service, Inc., oil keeps a gas-powered chainsaw engine's parts moving smoothly. "If you don't have oil, you could destroy the engine," she says.