Description

The Sea-Doo 4-TEC STD Piston Ring Kit is a quality aftermarket replacement solution for overhauling the Rotax 1503 4-TEC engine found in 215 to 300 hp Sea-Doo GTX, RXP, and RXT jet skis, as well as Williams Sportjet tenders (435, 400, 460, 520). This standard size (STD) piston ring kit ensures optimal cylinder sealing and restores original engine performance after wear or during a complete overhaul.

Ideal for preventive replacement at the start of the season or during a cylinder reboring, this kit guarantees reliable restoration of the supercharged 4-TEC engine.

Technical Specifications

Type: Piston ring kit – Standard Size (STD)
Engine Application: Rotax 1503 4-TEC supercharged
Covered Horsepower: 215 / 255 / 260 / 300 hp
Material: High-performance treated steel
Condition: New
Type: Aftermarket – OEM replacement
Weight: 713 g
Regulated substances: None
Installation: Recommended by a qualified technician

Compatibility

Compatible with Sea-Doo models equipped with the supercharged Rotax 1503 4-TEC engine:

GTX 215 / GTX 255 / GTX 260 / GTX 300
RXP 215 / RXP-X 255 / RXP-X 300
RXT 215 / RXT 255 iS / RXT 260 / RXT-X 300

Also compatible with Williams Tender dinghies equipped with the Rotax 1503 or 1630 engine:

Williams 435 Sportjet (Rotax ACE 1503 or ACE 1630)
Williams 400 Sportjet
Williams 460 Sportjet
Williams 520 Sportjet

⚠️ Always check your VIN and the original OEM reference before ordering to confirm exact compatibility with your model.

Why Replace Piston Rings?

Piston rings ensure the seal between the piston and the cylinder wall. Over time and repeated thermal cycles, they wear out and lose their tension, leading to a loss of compression and degraded engine performance. Common symptoms of wear include:

Progressive loss of power
Abnormal oil consumption (blue smoke from the exhaust)
Difficult or unstable starting
Cylinder compression below original values

Preventive replacement at the start of the season or after 100 hours of navigation helps prevent costly engine failure and restore original performance.

🚚 Express Shipping Europe – 3 to 7 Business Days

This product is available for express delivery to all of Europe (France, Belgium, Switzerland, Spain, Italy, Germany, Portugal, Netherlands, etc.) with an estimated delivery time of 3 to 7 business days after dispatch. Select the "1 kit – Europe EXPRESS Delivery" option when ordering to benefit from this priority service. A standard worldwide shipping option is also available.