Press and hold the Power button to break into a Chainsaw Sprint. Survivors hit during a Chainsaw Sprint are put into the dying state.
Each Chainsaw action (starting the Chainsaw, revving the Chainsaw, and Chainsaw Sprinting) will cause the overheat meter to increase.
When the overheat meter is filled, the Chainsaw cannot be used until it fully cools down. Reaching the heat capacity will not interrupt an ongoing Chainsaw Sprint.
The overheat meter decreases when the Chainsaw is not in use.