Description

This complete 3-piston kit for the Sea-Doo Rotax 1503 4-TEC supercharged engine, in standard (STD) size, includes 3 pistons, their rings, the wrist pins, and the circlips. It is intended for the overhaul of the three cylinders of the engine on the 215, 255, and 260 hp applications specified below. This is not a ring set only, nor a kit for a single cylinder.

The pistons and their rings contribute to the compression and sealing of the cylinders. This new adaptable assembly is used during an engine overhaul or the replacement of worn or damaged components, after checking the cylinders and the mounting dimensions. The OEM replacement part number for this kit is not provided in the sheet.

Technical Specifications

OEM part number: not provided for this kit; match to be confirmed before ordering.
Manufacturer part number: not provided.
Type: complete 3-piston kit adaptable for the Rotax 1503 4-TEC supercharged engine.
Size: standard (STD).
Applicable power ratings: 215 / 255 / 260 hp, depending on the model and year.
Condition: new.
Packaging: 1 kit for 3 cylinders, including 3 pistons, their rings, the wrist pins, and the circlips.
Indicated weight: 1.84 kg.
Regulated substances: none reported in the sheet.
Installation: by a qualified mechanic, after checking the bore, the piston/cylinder clearance, the ring end gap, and the manufacturer's specifications.

Compatibility

Sea-Doo applications listed for the Rotax 1503 4-TEC supercharged engine with 215, 255, or 260 hp, in STD size. The models and years listed below do not preclude checking the dimensions and the original piston part number.

RXP / RXP Supercharged – 2004 to 2006, only 215 hp versions affected.
RXP 215 – 2007 to 2010.
RXT / RXT 215 – 2005 to 2010, only 215 hp versions affected.
RXT 255 iS – in the 2005 to 2010 range listed for the RXT family; exact model year to be confirmed by VIN.
GTX 215 / 215 iS / 215 Wake / 215 Limited – 2007 to 2016, depending on the version.
GTX 255 Limited iS – 2009.
GTX 260 Limited iS / Limited S – 2010 to 2017, depending on the version.
RXT 260 / RXT 260 iS – 2010 to 2017, depending on the version.
GTR 215 – 2012 to 2016.

The metadata of the sheet also mentions the Williams 400, 435, 460, and 520 with Rotax 1503 engine annexes. For these applications, the engine version, power, and piston match must be confirmed before ordering. This mention does not cover the Rotax 903 or 1630 versions.

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

Why Replace the Pistons and Their Rings?

Wear or deterioration of the pistons and their rings can reduce cylinder sealing and disrupt engine operation. Overheating, lubrication failure, or a failure requires investigating the cause before installing a new assembly.

Insufficient or uneven compression between the cylinders.
Loss of power and difficult starting.
Abnormal oil consumption or blue smoke.
Scratched pistons, broken rings, or damaged ring grooves during disassembly.

During an overhaul, have the condition and dimensions of each cylinder checked before choosing the STD size. Replacement depends on the diagnosis and the prescribed wear limits, and not on a systematic 100-hour interval.