Sea-Doo GTX RXT RXP 300 Supercharger – OEM Ref. 420893566 / 420893567
Description
The supercharger is the key component of the supercharging system in Sea-Doo jet skis equipped with the 4-TEC 300 HP engine. OEM references 420893566 and 420893567 correspond to the original BRP supercharger assembly, sold here in an Aftermarket version, ensuring forced air compression to the engine to deliver maximum performance. This aftermarket replacement is recommended in case of supercharger failure, significant power loss, or as part of a complete powertrain overhaul. Also compatible with the WILLIAMS 520 Sportjet (200 hp) tender.
Technical Specifications
- OEM Part Number: 420893566 / 420893567
- Type: Supercharger (Ass'y)
- Compatible Engine: Sea-Doo 4-TEC 300 HP
- Condition: New (aftermarket)
- Packaging: Unit (complete assembly)
- Weight: 3.5 kg
- Regulated Substances: None
- Installation: Direct replacement, specific tools required
Compatibility
This supercharger is compatible with the following Sea-Doo models equipped with the 4-TEC 300 HP engine:
- GTX 300: all years
- RXT-X 300: all years
- RXP-X 300: all years
- WILLIAMS 520 Sportjet: 200 hp (Rotax ACE 1630)
⚠️ Always check your serial number (VIN) and original OEM part number before ordering to confirm exact compatibility with your model.
Why Replace the Supercharger?
The supercharger is subjected to extreme rotational speeds and high temperatures. Bearings, impellers, and internal seals gradually wear out, especially in the absence of regular engine oil maintenance. Supercharger failure can lead to a complete loss of power, or even serious engine damage.
- Progressive or sudden power loss
- Abnormal noise (whistling, grinding) from the supercharger
- Unusual vibrations at high RPM
- Preventive inspection after 100 hours of navigation or every season
- Replacement or reconstruction every 200 hours
It is strongly recommended to replace the supercharger at the first signs of failure and to strictly adhere to BRP's recommended oil change intervals to preserve the supercharger's lifespan.
See Also – Other Compatible Sea-Doo Engine Parts
![]() 3" High Performance Intake Filter Kit – Sea-Doo 1503cc & 1603cc 2005+ |
![]() Crankshaft Seal Kit SEADOO / GTI / GTS 900 – Ref. 420450165 / 420850220 / 420450080 |

