Jet Ski Maintenance Checklist: Intervals & Questions Answered

Doing the proper and regular maintenance on your jet ski is one of the most critical things you can do as a PWC owner.

How often to service your jet ski and what you should service can be tricky and confusing to many.

In this post, I want to answer what maintenance you need to do and what times you need to do it. I also want to answer some of the common questions people have about maintaining their watercraft. The whole post will be broken down into time frames, with the questions answered at the bottom.

Before Every Ride

  • Lift the seats off for a few minutes to vent any fuel vapors before starting the engine. You should also lift the seats off to vent after refueling.
  • With the seats off, make sure the hull doesn’t have excess water in it; a few cups of water is normal; it’s when the water level reaches the engine that it’s a problem.
  • Check for any damages to the hull.
  • Check oil and coolant levels.
  • Check drain plugs and o-rings for any damage. Make sure the drain plugs are in before putting PWC in the water.
  • Start and run the PWC for 10 seconds out of the water to make sure it will start before putting it in the water.
  • Check trailer lights to make sure they work.
  • Check for fire extinguisher, safety kit, and whistle are in the machine.

After Every Ride

  • If you rode in salt water or dirty water (swamp), flush the jet ski engine on the garden hose.
  • After every ride, it’s best to rinse the engine compartment out with clean water from the garden hose, especially if you rode in salt water. The misting setting on the sprayer is preferred, and make sure your drain plugs are out. The jet ski engine should be off when doing this.
  • After every ride, it’s best to wash and clean before storing it, especially if you rode in saltwater. You can use car soap to clean; you don’t need to use boat soap.
  • Allow the PWC to fully dry before you put on the cover.

The First 5 Hours ONLY

The first 5 hours of a –BRAND NEW- jet ski are the most important, especially if it’s supercharged.

From hours 0 to 5 you want to go easy on your jet ski. This means you don’t keep the engine at one speed, but every few minutes change up the RPMs.

You can go full throttle and play around, but just don’t keep it at one speed for too long. You’re breaking in the engine, you can learn more here.

Forced Break-In

Some models do have a forced break-in period where you get more RPMs over time.

So if your brand-new jet ski doesn’t seem fast, it’s more than likely in a forced break-in mode that is designed to protect the engine.

First Service

Your first service is anywhere from 10 to 50 hours, depending on your manufacturer.

I like doing the first service around 10 to 25 hours, as I find 50 hours too long to wait.

Every Month

  • Spray anti-corrosion (silicone spray lube)* on anything shiny or electrical in the engine compartment. This is for sure a must if you ride in salt water.
  • Spray anti-corrosion (silicone spray lube) on anything metal or moves at the jet pump and reverse bucket. You can’t overdo it, but you must use silicone spray lube as it’s less likely to damage rubber and plastics.
  • Spray the seats with vinyl protectant*.
  • Spray the fiberglass of your watercraft with a spray wax to protect it from the sun. The boat spray wax works the best, but car spray wax will work too.

Every Year or 50 Hours, Whichever Comes First

  • Change the oil and oil filter.
  • Change the spark plugs.
  • Inspect engine mounts for any damage or cracks.
  • Inspect coolant tank level, leaks, or damage if you have a Sea-Doo.
  • Inspect air intake and hoses for any damages.
  • Check battery and terminals for damage or corrosion. Replace the battery every 3 to 5 years.
  • Check drain plugs and their o-rings for any damage.
  • Check the impeller and wear ring for any damage. Deep grooves and pieces missing from either is not a good sign. You’ll also know the wear ring is bad when the jet ski “feels like it’s not catching” when you give it gas.
  • Check driveshaft and carbon ring (Sea-Doo) for any damage.
  • Inspect reverse bucket for any damage.
  • Inspect fuses.
  • Check the sacrificial anode.

Sea-Doo Supercharger Maintenance

Please refer to our post on supercharger maintenance here.

Trailer Maintenance

  • Grease jet ski trailer bearings. Make sure to use marine grease.
  • Inspect tires for damage or dry rot.
  • Inspect trailer straps for damage or fading. The slightest tear in a strap means you need to replace them.

The Start Of Winter

The winter maintenance for a jet ski is called winterizing, and we have a post on that here.

Pre-Season Maintenance

The pre-season maintenance is the de-winterization process that we cover here.

Every 3 to 5 Years

  • Get a new battery for your PWC, even if it seems good. Many of the problems stem from a battery lying to you, so it’s best to replace them every 3 to 5 years.
  • Buy a new cover for your jet ski. Here’s a tip, buy a good cover from the manufacturer and buy a cheap cover online to put over the good cover. You can extend the life of your good cover, and when the cheap cover wears out, it’s easier on the wallet.
  • Buy new straps for your trailer; this is the front bow strap and rear straps*. The sun dries them out, which causes them to crack, and then they break due to the weight of your jet ski pulling on them.
  • Buy new tires for your trailer. Jet ski trailers are not used much, so the tires don’t wear out due to tread-life, but they do dry rot, especially if you don’t move them often. A tire that is dry rotted is very bad and dangerous to take on the road.
  • Inspect or replace engine coolant if you have a Sea-Doo.
  • Inspect or rebuild pump if needed.

If you’re not getting 3 to 5 years out of your jet ski battery, you need to get a smart battery charger. To learn more, check out this post here.



I began working at a jet ski dealership in 2007, initially in the parts and service area. I then transitioned to the technician side before eventually joining the sales team in 2013. I've done it all! While in sales, I created this website in 2014 to assist others with their common questions about watercraft. I now manage this site full-time, where I answer common questions, offer advice, and assist others with their PWC needs.

I've owned several watercraft and continue to buy, sell, and repair them. Currently, keep my Sea-Doo Spark as my main PWC. Additionally, I have developed tools like a used watercraft value calculator, a pricing calculator, an hour calculator, and more to better assist my readers.

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