Yamaha Four Stroke Outboard Motor Service Intervals

Note: When operating in salt water, turbid or muddy water, the engine should be flushed with clean water after each use.

After First Ten Hours or 30 Days:

• Battery: Inspect/charge
• Fuel filter: Inspect/clean
• Fuel System: Inspect
• Gear Oil: Change
• Engine Oil: Inspect and change.
• Spark Plugs: Clean/Inspect/replace as needed.

After First 50 Hours or 90 Days:

• Anode(s) (external): Inspect/replace
• Cooling water passages: Clean
• Fuel filter: Inspect/clean
• Fuel System: Inspect
• Propeller & Cotter Pin: Inspect/replace

Every 100 Hours or 6 Months

• Anode(s) (external): Inspect/replace
• Cooling Water Passages: Cleaning
• Engine Oil: Inspect/change
• Fuel Filter: Inspection/Cleaning
• Fuel System: Inspection
• Gear Oil: Change
• Greasing Points: Grease
• Propeller & Cotter Pin: Inspect/replace
• Timing Belt: Inspect/replace

Every 200 Hours or Yearly

• Anode(s) (external): Inspect/replace
• Anode(s) (internal): Inspect/replace
• Cooling Water Passages: Cleaning
• Cowling clamp: Inspect
• Engine Oil: Inspect/change
• Fuel Filter: Inspection/Cleaning
• Fuel System: Inspection
• Gear Oil: Change
• Greasing Points: Grease
• Idling Speed (EFI Models): Inspect/adjust
• Oil filter (cartridge): Change
• PCV: Inspect
• Power Trim & Tilt Unit: Inspect
• Propeller & Cotter Pin: Inspect/replace
• Shift link/Shift cable: Inspect/adjust
• Spark Plugs: Clean/adjust/replace
• Thermostat: Inspect
• Throttle link/cable/pick-up timing: Inspect/adjust
• Timing Belt: Inspect/replace
• Water pump: Inspect

Note: When operating in salt water, turbid or muddy water, the engine should be flushed with clean water after each use.

Additional maintenance items:

Every 500 Hours or 2.5 years:

• Valve Clearance on DOHC engines should be inspected/adjusted. When using lead or high-sulfer gasoline this inspection may be required more frequently.

Every 1000 hours or 5 years:

• Timing Belt should be replaced.