Description

The Sea-Doo 4-TEC Timing Chain Tensioner Kit is a direct replacement part for ROTAX ACE 4-stroke engines found in Sea-Doo jet skis and water sports boats. Referenced as 420236259 / 420430623 / 420430624 / 290236252 / 415129408 / 290640453, this complete kit includes the chain tensioner, gasket, and sealing plug, ensuring a clean and durable repair. Use as preventive maintenance during engine overhaul or as a replacement as soon as characteristic chain noises appear.

Technical Specifications

OEM References: 420236259, 420430623, 420430624, 290236252, 415129408, 290640453
Type: Timing Chain Tensioner Kit
Kit Contents: 1x chain tensioner + 1x O-ring + 1x sealing plug
Fitment: Direct Replacement
Condition: New
Packaging: Complete kit
Weight: 64 g
Regulated Substances: None
Installation: Direct replacement, standard tools

Compatibility

This tensioner kit is compatible with all Sea-Doo 4-TEC (ROTAX ACE) engines produced between 2007 and 2012, covering the GTI, GTX, RXP, RXT, Wake, Speedster, Challenger, and Sportster ranges.

2012: GTX Ltd iS 260, GTX S 155, RXP-X 260, RXT 260, RXT 260 RS, RXT iS 260, RXT-X 260, RXT-X 260 aS, Wake 155, Wake Pro 215, 150 Speedster 155
2011: GTI 130, GTI LTD 155, GTI SE 130/155, GTS 130, GTX 155/215, GTX iS 215, GTX LTD iS 260, RXP-X 255, RXT 260, RXT iS 260, RXT-X 260, Wake 155, Wake Pro 215, 150/180/200/210/230 Speedster/Challenger/SP/Wake
2010: GTI 130, GTI SE 130/155, GTX 155, GTX iS 215, GTX LTD iS 260, RXP-X 255, RXT 215, RXT iS 260, Wake 155, Wake Pro 215, 150/180/200/230 Speedster/Challenger/Wake
2009: GTI 130, GTI SE 130/155, GTX 155/215, GTX LTD iS 255, RXP 215, RXP-X 255, RXT 215, RXT iS 255, RXT-X, Wake Pro 215, 150/180/200/205/230 Speedster/Challenger/Utopia/Islandia
2008: GTI 130, GTI SE 155, GTX 4Tec/LTD/215, GTX LTD 215, RXP 155/215, RXP-X 255, RXT-X 255, Wake 155/215, Islandia 220, Speedster 200, Sportster 4Tec/SC, Utopia, Challenger 1800
2007: GTI 130, GTI SE 155, GTX 4Tec/LTD/215, RXP, RXT, Wake 215, Speedster 200/215 IC, Sportster 4Tec/SC, Utopia, Challenger 1800

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

Why Replace the Timing Chain Tensioner?

The timing chain tensioner maintains the correct tension of the chain connecting the crankshaft to the camshafts of the ROTAX 4-TEC engine. A worn or faulty tensioner leads to chain slack, which can cause serious and costly engine damage. Preventive action is strongly recommended during each major overhaul or after 50 hours of navigation.

Clattering or rattling noise on startup or when cold
Check engine light on with a fault code related to timing
Loss of power or erratic idling
Oil leak at the tensioner plug
High mileage or engine hours (preventive maintenance)

We recommend replacing this kit at the beginning of the season or during any work on the cylinder head of the ROTAX ACE 4-TEC engine, to ensure the longevity and reliability of your engine.