Jet skis are built for speed, fun, and adventure on the water, but without proper maintenance, they can quickly become a source of frustration and expensive repairs. Many jet ski owners unknowingly make small maintenance mistakes that can lead to serious mechanical issues, reduced performance, or even complete engine failure.
Regular upkeep is essential to keep your jet ski running smoothly, but some of the most common mistakes are also the easiest to overlook. In this guide, we’ll break down the eight most overlooked jet ski maintenance mistakes and show you how to avoid them to ensure your personal watercraft stays in top shape for years to come.
8 Overlooked Jet Ski Maintenance Mistakes
- Not Using a Professional Jet Ski Maintenance Company
- Neglecting to Flush the Engine After Riding
- Forgetting to Check and Change the Oil
- Ignoring Battery Maintenance
- Running the Jet Ski in Shallow or Debris-Filled Water
- Skipping Impeller and Jet Pump Inspections
- Improper Storage and Lack of Winterization
- Forgetting to Inspect and Replace Spark Plugs
1. Not Using a Professional Jet Ski Maintenance Company
Many jet ski owners assume they can handle all maintenance themselves, but hidden issues can go unnoticed without professional servicing until they become costly repairs. A professional jet ski maintenance company has the expertise, tools, and knowledge to thoroughly inspect, service, and repair your jet ski, ensuring it runs at peak performance.
Routine professional maintenance can detect problems like early signs of wear, fuel system issues, or cooling system blockages that DIY inspections might miss. While servicing your jet ski yourself can save money upfront, skipping professional tune-ups can lead to expensive breakdowns and shorter engine life. Scheduling regular maintenance with a certified technician can extend your jet ski’s lifespan and prevent unexpected failures.
2. Neglecting to Flush the Engine After Riding
Saltwater and debris can cause serious internal damage if left in the cooling system after a ride. Many jet ski owners forget to flush the engine after each use, leading to salt buildup, corrosion, and clogged cooling passages. This can cause overheating and reduce engine efficiency over time.
To prevent this, flush the engine with fresh water after every ride, especially if you’ve been riding in saltwater. Connect a hose to the flushing port, start the engine, and let the water run through the system for a few minutes. This simple step will help clear out sand, debris, and salt, keeping your jet ski’s cooling system in good condition.
3. Forgetting to Check and Change the Oil
Like a car, your jet ski requires regular oil changes to keep the engine lubricated and running smoothly. Many owners either forget to check their oil levels or wait too long between oil changes, leading to increased friction, overheating, and premature engine wear.
To prevent engine damage, check the oil level regularly and follow the manufacturer’s guidelines for oil changes. Most jet skis need an oil change every 50 hours or at least once a season. Using high-quality marine-grade oil will also help maximize performance and engine longevity.
4. Ignoring Battery Maintenance
A dead battery is one of the most common reasons jet skis fail to start. Many owners leave their batteries connected for long periods without charging them, leading to a drained or damaged battery. Extreme temperatures and lack of use can also cause batteries to degrade faster than expected.
Charge your jet ski battery regularly to avoid battery failure, especially during the off-season. When not in use, disconnect the battery and store it in a cool, dry place. Using a battery tender or trickle charger can help maintain the charge and extend battery life, ensuring your jet ski is always ready to go when needed.
5. Running the Jet Ski in Shallow or Debris-Filled Water
Many jet ski riders don’t realize that operating in shallow water or areas with a lot of debris can damage the impeller and cooling system. Sand, rocks, and seaweed can get sucked into the intake grate, leading to clogs, reduced performance, and even severe engine damage.
To prevent this, avoid riding in water less than three feet deep and be cautious in areas with floating debris. If you accidentally suck up debris, turn off the engine immediately and inspect the intake grate before restarting. Regularly checking the impeller and intake for obstructions can help prevent long-term damage.
6. Skipping Impeller and Jet Pump Inspections
The impeller and jet pump are essential for propulsion, yet they are often overlooked in routine maintenance. If the impeller blades are bent, chipped, or obstructed, your jet ski may experience reduced acceleration, lower top speeds, or poor fuel efficiency.
To keep your jet ski performing at its best, inspect the impeller and jet pump regularly for signs of wear or damage. If you notice a decrease in performance, unusual vibrations, or strange noises while riding, having a professional check the impeller is a good idea. Replacing a damaged impeller is far more affordable than dealing with a complete pump failure.
7. Improper Storage and Lack of Winterization
Improper storage can cause serious problems, especially for jet skis stored in cold climates. Water left in the engine or cooling system can freeze, leading to cracked components and costly repairs. Additionally, jet skis that sit for long periods without proper fuel treatment may develop fuel system clogs and engine issues.
To prevent damage, always store your jet ski in a dry, climate-controlled area or use a high-quality cover to protect it from the elements. If you live in a cold region, winterizing your jet ski by draining water from the system, stabilizing the fuel, and removing the battery can help prevent costly damage and ensure it’s ready for the next season.
8. Forgetting to Inspect and Replace Spark Plugs
Spark plugs play a crucial role in starting your jet ski and ensuring smooth engine performance, yet they are often neglected. Over time, spark plugs can become fouled with carbon buildup, making it harder for the engine to start or causing misfires.
Regularly checking and replacing your spark plugs can prevent starting issues and improve fuel efficiency. Inspect them at least once a season and replace them as needed. Keeping a spare set of spark plugs on hand can also prevent you from getting stranded on the water.
