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Sea-Doo 1630 4-TEC STD Platinum Piston Kit – 3 Cylinder – GTX RXP-X RXT-X 300 hp – Ref. 420892738

Name: Sea-Doo 1630 4-TEC STD Platinum Piston Kit – 3 Cylinder – GTX RXP-X RXT-X 300 hp – Ref. 420892738
Brand: ROTAX tender parts
Price: 499.90 EUR
Availability: InStock

€499,90 EUR

Description

The Sea-Doo 1630 4-TEC STD Platinum Piston Kit is a complete set of 3 standard-sized pistons designed for overhauling the Rotax 1630 4-TEC 300 hp engine found in Sea-Doo GTX Limited, RXP-X 300, and RXT-X 300 jet skis. The Platinum finish guarantees superior quality to OEM specifications, with increased heat and wear resistance for this high-performance engine.

This kit of 3 pistons (one per cylinder) is compatible with OEM part number 420892738 and is suitable for standard bore cylinder reboring. Also compatible with Williams Sportjet tenders equipped with the Rotax ACE 1630 engine.

Technical Specifications

OEM Reference: 420892738
Type: Platinum 3-Piston Kit – Standard Size (STD)
Engine Application: Rotax 1630 4-TEC 300 hp
Contents: 3 complete pistons (one per cylinder)
Finish: Platinum – superior to OEM quality
Condition: New
Type: Aftermarket – OEM replacement
Weight: 2 kg
Regulated substances: None
Installation: Recommended by a qualified technician

Compatibility

Compatible with Sea-Doo models equipped with the Rotax 1630 4-TEC 300 hp engine:

GTX 300 Limited – 2016 to 2025
RXP-X 300 – 2016 to 2025
RXT-X 300 – 2016 to 2025

Also compatible with Williams Tender annexes equipped with the Rotax ACE 1630 engine:

Williams 435 Sportjet (Rotax ACE 1630)
Williams 460 Sportjet
Williams 520 Sportjet

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

Why Replace 1630 Engine Pistons?

The Rotax 1630 4-TEC 300 hp engine is a high-performance engine subject to high thermal and mechanical stresses. Pistons gradually wear out, leading to a loss of compression and degradation of performance. Common symptoms warranting replacement are:

Noticeable loss of power or torque
Abnormal oil consumption (blue smoke)
Difficult or unstable starting
Cylinder compression below original values
Engine knocking when cold

Preventive replacement at the beginning of the season or after 150 hours of navigation helps avoid costly engine failure on this high-performance powertrain.

🚚 Express Europe Delivery – 3 to 7 Business Days

This product is available for express delivery throughout Europe (France, Belgium, Switzerland, Spain, Italy, Germany, Portugal, Netherlands, etc.) with an estimated delivery time of 3 to 7 business days after dispatch. A standard worldwide delivery option is also available for orders outside Europe. Contact us for available shipping options for your country.