Fully mobile across Adelaide
Jet ski servicing, repairs and performance.
GSKI Performance comes to you. Servicing, diagnostics, supercharger and jet pump rebuilds, and performance work for Sea-Doo, Yamaha and Kawasaki skis.
Booking requests go through ServiceM8. A request is not a confirmed appointment. Harry gets back to you to lock in a time.
- Sea-Doo
- Yamaha
- Kawasaki
01 / Services
What GSKI does
Servicing and diagnostics, supercharger and jet pump rebuilds, wear rings, carbon seals, exhausts, accessories and performance upgrades.
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Servicing and diagnostics
Scheduled and premium services, first services on new skis, and diagnostics when something is not right. Done at your place, with the findings explained.
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Supercharger and jet pump rebuilds
Supercharger rebuilds, jet pump rebuilds, wear rings and carbon seals. The parts that wear on a hard-used ski.
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Performance upgrades, exhausts and accessories
Exhausts, accessories and performance upgrades, fitted and checked. Talk through what you want from the ski first.
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Regular maintenance isn’t cheap. But it is cheaper than a new motor.
02 / Recent work
Found on the job
Two recent premium services, both on supercharged Sea-Doos. Each one turned up something worth knowing about.
Sea-Doo RXP X RS 300, Mount Barker
- Job
- Premium service
- Found
- Carbon seal wear
- Next
- Owner rebooked to replace the seal
Caught during inspection, before it progressed into a more serious issue.
2020 Sea-Doo RXT X RS 300, Glenelg
- Job
- Premium service
- Found
- Loose driveshaft C-clip in the hull
- Also
- Water ingress in the jet pump
03 / Mobile visits
How a visit works
Get in touch
Call or text 0421 758 294, or send a booking request. Say what the ski is and what it needs.
Confirm a time
Harry gets back to you to lock in the visit. Nothing is booked until he confirms.
Harry comes to you
GSKI is fully mobile. The work is done where your ski is kept.
Hear what was found
You get told what the inspection found and what it needs next.
04 / Gallery
Real jobs, real skis
Photos from recent GSKI services. Select a photo to see it larger.
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Compression test on the Rotax engine. 
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Spark plugs out for inspection. 
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Battery and electrical system test. 
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Jet pump removed for inspection. 
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Oil service set up on the ski. 
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Compression test on the RXT X RS 300. 
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2025 RXP X RS 325 opened up for its first 10 hour service. 
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Pump opened up to check its condition.
05 / Service area
Adelaide metro. Further by arrangement.
- Adelaide metroMobile visits
- Further outBy arrangement, call first
- Recent jobsGlenelg, Mount Barker
06 / FAQ
Quick answers
Do you come to me?
Yes. GSKI Performance is fully mobile across the Adelaide metro area. Further travel is available by arrangement, so call first if you are outside Adelaide.
Which brands do you work on?
Sea-Doo, Yamaha and Kawasaki jet skis.
How do I book?
Call or text 0421 758 294, or send a booking request through ServiceM8 (external site). A request is not a confirmed appointment. Harry will get back to you to confirm a time.
How much does a service cost?
It depends on the ski and the work. There are no set prices on this site. Call 0421 758 294 for a quote.
What if you find a problem during a service?
Finding wear early is the point of a proper service. On a recent RXP X RS 300 service in Mount Barker, carbon seal wear was found and the owner was rebooked to have the seal replaced.
What should I have ready?
Tell us the make, model and where the ski is kept when you book. Harry will confirm anything else needed for the visit.
Call first
Book a service
Calls are the fastest way to sort a visit or a quote.
0421 758 294Booking requests go through ServiceM8. A request is not a confirmed appointment. Harry gets back to you to lock in a time.