Mercury 300 XS OptiMax Manual page 73

• Wash the power package exterior (cowl, midsection, and gearcase) with
fresh water.
• Flush the propeller and gearcase exhaust outlet with fresh water.
• Remove the cowl and wipe off any saltwater spray with a damp cloth.
EVERY 25 HOURS OR EVERY 30 DAYS OF SALTWATER OR
POLLUTED WATER USE
• Spray the powerhead and all external, unpainted metal surfaces (except
anodes) with Corrosion Guard.
EVERY 25 HOURS OR EVERY 30 DAYS, WHICHEVER OCCURS FIRST
• Visually inspect the front and side cowl latches for tightness. Tighten if
necessary.
• Visually inspect the fuel and oil systems for deterioration or leaks.
• Visually check steering link rod fasteners for wear.
•
Lubricate all components listed in Lubrication Points.
• Check all attachment hardware for proper torque tightness.
• Check the level and condition of the gearcase lubricant.
• Check the alternator belt condition.
EVERY 50 HOURS OR ONCE A YEAR, WHICHEVER OCCURS FIRST
• Lubricate the splines on the driveshaft.
• Lubricate the entire length of the driveshaft with Extreme Grease.
•
Lubricate the splines on the propeller shaft. Refer to Lubrication Points.
• Drain and replace the gearcase lubricant.
• Check the spark plug gap and replace if necessary.
• Inspect the alternator and compressor for deterioration and replace if
necessary.
• Check the fuel pressure. This item should be serviced by an authorized
dealer.
• Check the control cable adjustments.
• Inspect the battery.
• Check the corrosion control anodes.
• Check the power trim fluid.
EVERY 100 HOURS OR ONCE A YEAR, WHICHEVER OCCURS FIRST
• Replace the water pump impeller (more often if overheating occurs or
reduced water pressure is noted). This item should be serviced by an
authorized dealer.
• Use QuicKleen in the fuel.
eng
MAINTENANCE
67