Seadoo Aftermarket Throttle Body

High‑quality, tried and tested UK tested and calibrated JSH aftermarket throttle body designed for 2009–2025 Sea‑Doo watercraft fitted with the 1503 or 1630cc Rotax engine, covering all models from 130 hp up to 325 hp.
Many similar‑looking versions are available online, but most suffer from poor reproduction machining tolerances being a copy of a copy, weak electronics from substandard parts or very short service life. 
This JSH unit is the proven pattern part that delivers correct fitment, stable operation and long‑term reliability.
Key Features
- Direct replacement for Sea‑Doo 1503 and 1630 engines (2009–2025)  
- Suitable for all horsepower variants from 130 to 325 hp  
- Precision electronics for stable idle and smooth throttle response  
- Built to OEM‑level tolerances for consistent long‑term performance  
- 95% of installations require no ECU reset  
- Free ECU reset available at our waterside workshop in Poole if required  
- 12‑month parts warranty
Replaces OEM Part Numbers
- 420892592  
- 420892590  
- 420892591  
Why Choose This Version
This is the reliable, tested pattern throttle body that works correctly and continues to work. Cheaper copies often fail prematurely or cause intermittent running issues. The JSH unit is the trusted aftermarket option used across the industry.