Single Intake / Exhaust Valve – Sea-Doo 1503 Rotax Engine

This replacement valve is designed for Sea-Doo 1503 Rotax engines (GTI, GTX, RXP, RXT). Available individually as an intake, exhaust, or as an intake + exhaust pack, it corresponds to OEM references 420254682, 420254293, and 420254298. Ideal for targeted replacement during a cylinder head overhaul or after detecting a faulty valve.

Technical Specifications

Exhaust OEM Reference: 420254682
Intake OEM Reference: 420254293 / 420254298
Application: Rotax 1503 Sea-Doo Engine
Packaging: Per unit – 3 options available (Intake / Exhaust / Intake+Exhaust Pack)
Material: High-strength thermal steel
Weight: 0.2 kg
Condition: New
Regulated substances: None
Installation: Direct OEM replacement, lapping recommended

Sea-Doo 1503 Compatibility

These valves (Intake or Exhaust) are compatible with the following Sea-Doo models equipped with the Rotax 1503 engine:

Sea-Doo GTI 130
Sea-Doo GTX 155 / 185 / 215 / 255 / 260
Sea-Doo RXP / RXP-X
Sea-Doo RXT / RXT-X

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

Why Replace a Valve in Your Sea-Doo?

A worn or deformed valve compromises the sealing of the combustion chamber and degrades the performance of the 1503 engine. Common symptoms of a faulty valve include:

Loss of compression in one or more cylinders
Difficult starting or stalling when cold
Abnormally high fuel consumption
Metallic knocking sound during acceleration
Progressive loss of power during navigation

Single unit replacement is suitable when only one valve is identified as faulty. For a complete overhaul, opt for our 12-valve kit. Plan for this replacement in case of a bent valve, for example. Another important point: remember to also replace the valve stems, available on our website.