An outdoor tool and a lubrication system for an outdoor tool are provided. A tool includes a powerhead, a tool unit powered by the powerhead, and a lubrication system. The lubrication system includes a reservoir, a pump, and a check valve. The lubrication system is configured to transport a lubricant from the reservoir to an output that is configured to supply the lubricant to the tool unit. The check valve is a separate component from the pump and the reservoir and is spaced apart from the pump and the reservoir.