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Orders $99 or more ship free within the contiguous U.S.

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Not the right fit? No problem. Send it back within 45 days—no questions, no hassle.

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Expert Support When You Need It

We’re here to make your experience smooth, simple, and stress-free—so you can get back to doing what you love.

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Yamaha Outboard Service Schedule

What is included in the Yamaha 500 hour service checklist?

The Yamaha 500-hour service checklist includes critical inspections and part replacements like timing belts, spark plugs, water pump components, valve clearance, fuel filters, external and internal anodes, and oil filters. This advanced level of two stroke outboard maintenance ensures long-term reliability and peak performance after extensive use.
Yamaha outboards are designed to last well beyond 3,000 hours with proper care. By following a structured 20-hour, 100-hour, 300-hour, and 500-hour Yamaha outboard service checklist—including key two stroke outboard engine maintenance tasks such as spark plug replacement, gear oil changes, and fuel system inspection—you ensure maximum reliability, safe operation, and long-term protection.
MAINTENANCE ACTION20 HRS/3 MOS100 HRS/1 YR300 HRS/3 YRS500 HRS/5 YRS
Replace Gear Oil✅ Yes✅ Yes✅ Yes✅ Yes
Replace Engine Oil✅ Yes✅ Yes✅ Yes✅ Yes
Check/Replace wiring harness connections and lead coupler connections✅ Yes✅ Yes✅ Yes✅ Yes
Check/Replace engine start switch and engine shut off switch✅ Yes✅ Yes✅ Yes✅ Yes
Check/Replace ignition coils/ignition coil leads✅ Yes✅ Yes✅ Yes✅ Yes
Check/Replace propeller/propeller nut/cotter pin✅ Yes✅ Yes✅ Yes✅ Yes
Check/Replace fuel line (low pressure)✅ Yes✅ Yes✅ Yes✅ Yes
Check/Replace fuel line (high pressure)✅ Yes✅ Yes✅ Yes✅ Yes
Check/Replace fuel filter (Can be disassembled)✅ Yes✅ Yes✅ Yes✅ Yes
Check/Replace cooling water leakage✅ Yes✅ Yes✅ Yes✅ Yes
Check/Charge/Replace battery (electrolyte level, terminal)✅ Yes✅ Yes✅ Yes✅ Yes
Check/Adjust/Replace throttle link/throttle cable✅ Yes✅ Yes✅ Yes✅ Yes
Check/Adjust/Replace shift link/shift cable✅ Yes✅ Yes✅ Yes✅ Yes
Lubricate greasing points✅ Yes✅ Yes✅ Yes✅ Yes
Check Yamaha meter/gauge✅ Yes✅ Yes✅ Yes✅ Yes
Check water inlet✅ Yes✅ Yes✅ Yes✅ Yes
Check pilot water✅ Yes✅ Yes✅ Yes✅ Yes
Check PTT unit✅ Yes✅ Yes✅ Yes✅ Yes
Check fuel/oil leakage✅ Yes✅ Yes✅ Yes✅ Yes
Check engine idle speed/noise✅ Yes✅ Yes✅ Yes✅ Yes
Check engine starting condition noise✅ Yes✅ Yes✅ Yes✅ Yes
Check/Replace timing belt❌ No✅ Yes✅ Yes✅ Yes
Check/Replace thermostat❌ No✅ Yes✅ Yes✅ Yes
Check/Replace spark plugs❌ No✅ Yes✅ Yes✅ Yes
Check/Replace impeller/ water pump housing❌ No✅ Yes✅ Yes✅ Yes
Replace engine oil filter❌ No✅ Yes✅ Yes✅ Yes
Check anodes (cylinder head exhaust passage)❌ No✅ Yes✅ Yes✅ Yes
Check anodes (external)❌ No✅ Yes✅ Yes✅ Yes
Check cowling lock lever❌ No✅ Yes✅ Yes✅ Yes
Check/Replace fuel pump❌ No❌ No✅ Yes✅ Yes
Replace OVC filter❌ No❌ No❌ No✅ Yes
Check anodes (cylinder head, cylinder block thermostat portion, oil cooler cover, exhaust guide)❌ No❌ No❌ No✅ Yes
Check/Adjust valve clearance❌ No❌ No❌ No✅ Yes

20 HOURS/3 MONTHS

  • Replace Gear Oil 
  • Replace Engine Oil 
  • Check/Replace wiring harness connections/lead coupler connections 
  • Check/Replace engine start switch/engine shut-off switch 
  • Check/Replace ignition coils/ignition coil leads 
  • Check/Replace propeller/propeller nut/cotter pin 
  • Check/Replace fuel line (low pressure) 
  • Check/Replace fuel line (high pressure) 
  • Check/Replace fuel filter (can be disassembled) 
  • Check/Replace cooling water leakage 
  • Check/Charge/Replace battery (electrolyte level, terminal) 
  • Check/Adjust/Replace throttle link/throttle cable 
  • Check/Adjust/Replace shift link/shift cable 
  • Lubricate greasing points 
  • Check Yamaha meter/gauge 
  • Check water inlet
  • Check pilot water 
  • Check PTT unit 
  • Check fuel/oil leakage 
  • Check engine idle speed/noise
  • Check engine starting condition noise

100 HOURS/1 YEAR

  • Replace Gear Oil 
  • Replace Engine Oil 
  • Check/Replace wiring harness connections/lead coupler connections 
  • Check/Replace engine start switch/engine shut-off switch 
  • Check/Replace ignition coils/ignition coil leads 
  • Check/Replace propeller/propeller nut/cotter pin 
  • Check/Replace fuel line (low pressure) 
  • Check/Replace fuel line (high pressure) 
  • Check/Replace fuel filter (can be disassembled) 
  • Check/Replace cooling water leakage 
  • Check/Charge/Replace battery (electrolyte level, terminal) 
  • Check/Adjust/Replace throttle link/throttle cable 
  • Check/Adjust/Replace shift link/shift cable 
  • Lubricate greasing points 
  • Check Yamaha meter/gauge 
  • Check water inlet
  • Check pilot water 
  • Check PTT unit 
  • Check fuel/oil leakage 
  • Check engine idle speed/noise
  • Check engine starting condition noise 
  • Check/Replace timing belt 
  • Check/Replace thermostat 
  • Check/Replace spark plugs 
  • Check/Replace impeller/water pump housing 
  • Replace engine oil filter 
  • Check anodes (cylinder head exhaust passage) 
  • Check anodes (external) 
  • Check cowling lock lever

300 HOURS/3 YEARS

  • Replace Gear Oil 
  • Replace Engine Oil 
  • Check/Replace wiring harness connections/lead coupler connections 
  • Check/Replace engine start switch/engine shut-off switch 
  • Check/Replace ignition coils/ignition coil leads 
  • Check/Replace propeller/propeller nut/cotter pin 
  • Check/Replace fuel line (low pressure) 
  • Check/Replace fuel line (high pressure) 
  • Check/Replace fuel filter (can be disassembled) 
  • Check/Replace cooling water leakage 
  • Check/Charge/Replace battery (electrolyte level, terminal) 
  • Check/Adjust/Replace throttle link/throttle cable 
  • Check/Adjust/Replace shift link/shift cable 
  • Lubricate greasing points 
  • Check Yamaha meter/gauge 
  • Check water inlet
  • Check pilot water 
  • Check PTT unit 
  • Check fuel/oil leakage 
  • Check engine idle speed/noise
  • Check engine starting condition noise 
  • Check/Replace timing belt 
  • Check/Replace thermostat 
  • Check/Replace spark plugs 
  • Check/Replace impeller/water pump housing 
  • Replace engine oil filter 
  • Check anodes (cylinder head exhaust passage) 
  • Check anodes (external) 
  • Check cowling lock lever 
  • Check and replace fuel pump

500 HOURS/5 YEARS

  • Replace Gear Oil 
  • Replace Engine Oil 
  • Check/Replace wiring harness connections/lead coupler connections 
  • Check/Replace engine start switch/engine shut-off switch 
  • Check/Replace ignition coils/ignition coil leads 
  • Check/Replace propeller/propeller nut/cotter pin 
  • Check/Replace fuel line (low pressure) 
  • Check/Replace fuel line (high pressure) 
  • Check/Replace fuel filter (can be disassembled) 
  • Check/Replace cooling water leakage 
  • Check/Charge/Replace battery (electrolyte level, terminal) 
  • Check/Adjust/Replace throttle link/throttle cable 
  • Check/Adjust/Replace shift link/shift cable 
  • Lubricate greasing points 
  • Check Yamaha meter/gauge 
  • Check water inlet
  • Check pilot water 
  • Check PTT unit 
  • Check fuel/oil leakage 
  • Check engine idle speed/noise
  • Check engine starting condition noise 
  • Check/Replace timing belt 
  • Check/Replace thermostat 
  • Check/Replace spark plugs 
  • Check/Replace impeller/water pump housing 
  • Replace engine oil filter 
  • Check anodes (cylinder head exhaust passage) 
  • Check anodes (external) 
  • Check cowling lock lever 
  • Check and replace fuel pump 
  • Replace OVC filter 
  • Replace anodes (cylinder head, cylinder block thermostat portion, oil cooler cover, exhaust guide) 
  • Check/Adjust valve clearance

 → How many hours will a Yamaha outboard last?


A well-maintained Yamaha outboard often lasts well beyond 3,000 hours. Following a Yamaha service schedule, including 100-hour and 500-hour intervals, helps ensure this longevity.

 → What is the Yamaha 500 hour service checklist for 2-stroke outboards?


The 500-hour checklist includes replacing the timing belt, spark plugs, OVC filter, and water pump housing, inspecting all anodes, and adjusting valve clearance—essential two stroke outboard maintenance tasks.

Yamaha outboards are an investment—and with proper care at every 100-hour and 500-hour interval, they can far exceed their expected lifespan. Use this detailed service checklist as your maintenance roadmap, and explore our certified Yamaha service kits to keep your outboard engine in optimal condition year after year.
For helpful advice and guidance on many of the following maintenance tasks, check out our 100-hour guides for 2-Stroke and 4-Stroke Yamaha outboards!