Please choose the correct ending to complete the given sentence: Cars & Other Vehicles: [header] How to replace your mercury optimax dfi air injectors [title] Read your engine owners manual. [title] Purchase and read a factory shop manual. [title] Review all safety precautions.

Ending1: [title] Remove the mercury flywheel from the fuel tank. [step] Inspect the exposed area of the engine for smoke coming out or sparks. Ending2: [step] Make sure your fuel and heater are turned off. Keep the batteries charged on all cylinders to prevent theft and injury. Ending3: [step] Touching the air injectors after they are clean will pose a serious health risk. [title] Press and hold the igniter tab of the gasoline tank. Ending4: [title] Review tips on various websites such as airinjectors. Com [title] Consult with your local mercury dealer or certified merc tech.

Answer format: ending1/ending2/ending3/ending4