Mercury 250 XS OptiMax Operation, Maintenance & Installation Manual page 59

• Check the hydraulic steering fluid level, if equipped
AFTER EACH USE
• Wash the power package exterior with fresh water
• Flush the outboard cooling system, saltwater or brackish water only
ANNUALLY OR 100 HOURS
• Grease the engine, if applicable
• Change the engine oil and filter, if equipped
• Inspect the thermostat, saltwater or brackish water only
• Add Quickleen to the fuel tank, once per year, per engine
• Apply anti‑seize to the spark plug threads
• Replace the gear lubricant
• Inspect the corrosion control anodes
• Lubricate the propeller shaft splines
• Replace all filters on the suction side of the fuel system—dealer item
• Lubricate the driveshaft splines—dealer item
• Check the tightness on all the fasteners—dealer item
• Check the torque of the outboard mounting hardware—dealer item
• Check the battery condition and tightness of the battery cable connection
—dealer item
THREE YEARS OR 300 HOURS
• Replace the spark plugs
• Replace the water pump impeller—dealer item
• Inspect the carbon fiber reeds—dealer item
• Inspect the wire harness connectors—dealer item
• Check the remote control cable adjustment, if applicable—dealer item
• Replace the high‑pressure fuel filter—dealer item
• Replace the accessory drive belt—dealer item
• Check the power trim fluid level—dealer item
• Inspect the engine motor mounts—dealer item
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MAINTENANCE
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