Salt water, lake water, or both: your personal watercraft takes a beating every time it hits the water. This guide covers Sea-Doo, Yamaha WaveRunner, and Kawasaki Jet Ski maintenance from end to end. We include post-ride flushing, engine oil service, jet pump inspection, impeller and wear ring care, fuel system maintenance, electrical checks, supercharger service for performance models, and complete winterization. Select your water conditions below for a schedule tailored to your riding.
By Derek Hildreth, founder and lifelong rider
A jet ski needs an oil and filter change every 50 hours or annually, plus a fresh-water flush after every saltwater ride. Inspect the air filter every 25 hours, the jet pump every 50 hours, and replace spark plugs at 100 hours. Supercharged models need the supercharger oil checked at 25 hours and serviced at 100. Winterize once a season. Your owner's manual sets the exact numbers for your model.
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These intervals are based on data from major personal watercraft manufacturers, adjusted for how people actually ride, not worst-case manufacturer specs. Use the rider profile selector above the schedule to match your riding style. Always cross-reference with your owner's manual for model-specific requirements, as your manufacturer knows your machine best. For intervals tailored to your exact machine, download LookOver free on iOS and Android.
Hours or time, whichever comes first. Performance models have additional supercharger requirements.
| Service Task | Interval |
|---|---|
| Engine | |
Cam Chain / Tensioner Inspect | Every 100 hours or 8,000 miles or 24 months |
Engine Idle Speed Inspect | Every 25 hours or 2,000 miles or 6 months |
Spark Plug Inspect Inspect | Every 50 hours or 4,000 miles or 12 months |
Throttle Operation / Freeplay Inspect | Every 25 hours or 2,000 miles or 6 months |
Valve Clearance Inspect | Every 50 hours or 4,000 miles or 12 months |
Engine Oil Change Replace | Every 25 hours or 2,000 miles or 6 months |
Oil Filter Replace | Every 25 hours or 2,000 miles or 6 months |
Spark Plug Replace Replace | Every 100 hours or 8,000 miles or 24 months |
| Transmission & Clutch | |
Jet Pump / Impeller Inspect Inspect | Every 50 hours or 6 months |
Shaft Drive / Final Drive Fluid Replace | Every 100 hours or 8,000 miles or 24 months |
| Air & Intake | |
Air Filter Inspect / Clean Inspect | Every 5 hours or 500 miles or 1 month |
Air Filter Inspect / Clean Clean | Every 15 hours or 2,000 miles or 3 months |
Air Filter Replace Replace | Every 100 hours or 8,000 miles or 12 months |
| Fuel System | |
Fuel Injector Inspect Inspect | Every 150 hours or 12,000 miles or 24 months |
Fuel Line Inspect Inspect | Every 25 hours or 2,000 miles or 6 months |
Throttle Body Inspect Inspect | Every 100 hours or 8,000 miles or 24 months |
| Exhaust | |
Exhaust System Inspect Inspect | Every 50 hours or 4,000 miles or 12 months |
| Cooling System | |
Coolant Hoses Inspect Inspect | Every 50 hours or 4,000 miles or 12 months |
Coolant Level Check Inspect | Every 5 hours or 500 miles or 1 month |
Radiator Inspect / Clean Inspect | Every 25 hours or 2,000 miles or 6 months |
Marine Engine Flush Clean | Every 1 race |
Coolant Replace Replace | Every 100 hours or 12,000 miles or 24 months |
| Electrical | |
Battery Inspect / Maintain Inspect | Every 25 hours or 2,000 miles or 3 months |
Wiring / Electrical Inspect Inspect | Every 50 hours or 4,000 miles or 12 months |
| Brakes | |
Brake Fluid Inspect Inspect | Every 25 hours or 2,000 miles or 6 months |
Brake Line Inspect Inspect | Every 50 hours or 4,000 miles or 12 months |
Brake Pad Inspect Inspect | Every 25 hours or 2,000 miles or 6 months |
Brake Rotor Inspect Inspect | Every 100 hours or 8,000 miles or 24 months |
Brake Fluid Replace Replace | Every 8,000 miles or 12 months |
| Suspension | |
Shock Absorber Inspect Inspect | Every 50 hours or 4,000 miles or 12 months |
| Chassis & Hardware | |
Nuts, Bolts, Fasteners Inspect | Every 25 hours or 2,000 miles or 6 months |
Tire Inspect Inspect | Every 10 hours or 1,000 miles or 1 month |
Tire Pressure Check Inspect | Every 1 race |
Wheel Bearings Inspect Inspect | Every 50 hours or 4,000 miles or 12 months |
These schedules are built from manufacturer data and real-world riding - but nobody knows your machine better than you. If something looks off, tell us. We read every message.
Share Your FeedbackTrack hours, set reminders for oil changes and annual service. LookOver works even without cell signal on the water.
The single most important maintenance item for saltwater riders. Skip this and face a seized engine or destroyed pump.
Those first hours determine how your engine will perform for the next decade. Resist the urge to go full throttle.
Jet ski engines work harder than most. High RPM operation and water cooling make proper oil maintenance critical.
That 1500cc engine isn't just sitting there at 3,000 rpm like your truck. It's screaming at 7,000+ rpm, generating enormous heat, and doing it all in an environment where overheating means instant catastrophe.
Key differences:
Check before every ride. It takes 30 seconds.
Proper procedure:
Low oil: Add small amounts, recheck. Don't overfill.
Milky oil: Water contamination. Do NOT run the engine. Needs immediate attention.
Change every 50 hours or annually, whichever comes first.
You'll need:
Typical capacity: 4-5 quarts depending on model
Important: Always run the engine for a few minutes after filling to circulate oil through the filter, then recheck level.
The jet pump is what makes your PWC move. Impeller condition directly affects performance and fuel efficiency.
Water enters through the intake grate, accelerates through the impeller, and exits through the nozzle. This creates thrust.
Key components:
Inspect every 50 hours or if you notice performance loss.
What to look for:
Signs of problems: Cavitation (air bubbles causing vibration), reduced top speed, poor acceleration, unusual noise.
Before every ride, check the intake grate for debris.
Common debris:
Important: A blocked intake will cause the engine to overheat in under two minutes. Always clear debris before starting.
Proper winterization prevents costly repairs and ensures your PWC starts strong next season.
Document exactly what you did for storage. Next spring, you'll know exactly where you left off.
If your PWC has a supercharger, it requires additional maintenance beyond standard service.
Supercharged models (Sea-Doo RXP-X, Yamaha GP1800R SVHO, etc.) use a belt-driven compressor to force more air into the engine for increased power.
Models with superchargers:
The supercharger has its own oil supply separate from the engine.
Check interval: Every 25 hours
Service interval: Every 100 hours or annually
Important: Low supercharger oil causes bearing failure. This is an expensive repair.
Supercharged engines use an intercooler to cool the compressed air before it enters the engine.
Maintenance:
Note: Some models have a separate intercooler coolant circuit from the engine cooling system.
Track all your service intervals in one place. LookOver handles hours, miles, and dates so you never miss a service. Download free on iOS and Android.
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