The service intervals printed in your owner's manual are a minimum — a legal liability floor that manufacturers set assuming the best-case conditions. They're not written for a rider doing 30 hours a season in Jamaica Bay saltwater on a 5-year-old machine. They're written for the average user in the average environment, with the assumption that the owner is paying attention to every warning and keeping the ski in good shape between services.
Most riders don't fit that description. They ride hard during the season, skip a few things, and bring the ski in when something breaks. By then, the deferred maintenance has usually turned into a bigger repair bill. Here's what we actually recommend at AOG Performance, based on what we see break down season after season.
The Minimum: Annual Service, Every Year
Regardless of how many hours you've put on the ski, it should be serviced at least once a year. A New York riding season might be 20 hours for a casual rider or 60 hours for someone who's out every weekend. Either way, the calendar matters as much as the hour meter, because fluids degrade with time as well as use, and systems that haven't been inspected in a year have had a full year to develop problems.
A standard annual service includes:
- Engine oil and filter change
- Spark plug inspection and replacement if due
- Cooling system flush and inspection
- Jet pump and impeller inspection
- Fuel system inspection
- Battery test and terminal service
- Grease and lubrication of all moving parts
- Fault code scan — even if no warning lights are on
- Hull and bilge inspection
For saltwater riders, we also recommend a thorough freshwater flush of the entire cooling system at every service, plus descaling if there's visible mineral buildup in the passages.
The 100-Hour Service
If you're putting on 50–100+ hours a season — which we see with riders who are out regularly from May through September — the 100-hour mark triggers additional items beyond the standard annual service.
On supercharged platforms (Sea-Doo Rotax ACE 300, Yamaha SVHO, Kawasaki Ultra 310), the 100-hour mark is when the supercharger needs a full inspection, and in many cases a clutch pack service or full rebuild. BRP specifies 100-hour supercharger inspection intervals. Kawasaki specifies 50 hours for supercharger inspection on the Ultra 310. If you're at the interval, have it done. Skipping it is how a $400 inspection turns into a $3,000 engine rebuild.
At 100 hours we also look harder at:
- Impeller condition and pitch verification
- Drive shaft seal condition
- Coolant quality (if the ski has a closed-loop coolant circuit)
- All steering and throttle cable condition
- Electrical connection inspection, especially in saltwater-exposed areas
Saltwater Changes the Math
Jamaica Bay, Rockaway, the Sound, the Shore — all saltwater. Salt accelerates corrosion, deposits minerals in cooling passages, degrades rubber seals and cable jackets faster than freshwater, and in general puts more stress on every component that it touches. If you're riding in saltwater, the realistic service interval is tighter than what's in the manual.
We generally recommend that saltwater riders think of the factory interval as a maximum rather than a target. If the manual says every 100 hours or annually, aim for every 75 hours or annually. If it says every 50 hours, don't stretch it. The cost difference is small. The repair bill difference when something fails is not.
Warning Signs You're Overdue
Skis that are past due for service usually announce it. Here's what to watch for:
- Power loss or reduced top speed compared to how the ski felt when newer
- Hard starting, especially when warm
- Any fault code on the display — don't clear and ignore
- Overheating or limp mode during extended runs
- Oil usage between services (check the level, not just the alarm)
- Any change in sound — new rattles, new whines, new thumps
- Vibration through the hull that wasn't there before
Any of these warrants a diagnostic, not just the next scheduled service. If the ski is behaving differently, something changed. Let us find out what before it gets worse.
What Actually Breaks When Service Gets Skipped
From the things we see every season: spark plugs that haven't been changed foul and cause misfires. Injectors that haven't been treated with stabilized fuel gum up. Cooling passages that haven't been flushed scale up and cause overheating. Superchargers that haven't been inspected at interval fail and take engine components with them. Impellers that have never been looked at are often chipped and opening up the wear ring, costing 5–10 mph you've been wondering about.
None of these are catastrophic if caught early. All of them get more expensive with each additional season they go unaddressed. The annual service exists to find them early.
If you're in the New York/New Jersey area and your ski is due for service — or overdue — call us at (347) 225-5113 or reach out through the contact page. We do full diagnostics and seasonal maintenance from our shop in Howard Beach, Queens, and we're straight with you about what the ski actually needs.