Sea-Doo 4-TEC Forged Connecting Rod – OEM Replacement Part No. 420917516

This aftermarket forged connecting rod is designed to replace Sea-Doo OEM part number 420917516 on Rotax 4-TEC engines. A critical lower engine component, it ensures the transmission of force from the pistons to the crankshaft. Available individually or in a set of 3, it is suitable for complete lower engine overhauls or the targeted replacement of a faulty connecting rod. It is imperative to verify the OEM number before ordering.

Technical Specifications

Replaced OEM Part Number: 420917516
Type: Forged connecting rod – Rotax 4-TEC lower engine
Condition: New – aftermarket replacement part
Packaging: 1 piece or set of 3 pieces (as selected)
Weight: 0.2 kg / piece
Regulated substances: None
Installation: Direct replacement – technician intervention recommended

Compatibility

This forged connecting rod is compatible with the following Sea-Doo models equipped with the Rotax 4-TEC engine:

GTI 130 / GTI 155 (2008 – 2014)
GTR 215 / GTR 230
GTX 155 / GTX 215 / GTX 255 / GTX 260 / GTX 300
RXP 215 / RXP-X 255 / RXP-X 300
RXT 215 / RXT-X 255 / RXT-X 260 / RXT-X 300
Wake 155 / Wake Pro 215 / Wake Pro 230

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

Why Replace the Connecting Rod?

The connecting rod is one of the most stressed parts of the Rotax 4-TEC engine. Subject to extreme mechanical stresses during each engine cycle, it can deform or fracture due to lack of lubrication, overheating, or detonation. Here are common symptoms of a connecting rod nearing the end of its life:

Dull or metallic knocking sound at idle or during acceleration
Abnormal vibrations felt in the chassis
Loss of compression in one or more cylinders
Presence of metal shavings in the engine oil
Sudden engine shutdown or inability to start

We recommend replacing connecting rods during any complete lower engine overhaul, or as soon as any of these symptoms appear. Preventive replacement at the beginning of the season, after 150 hours of navigation, helps prevent costly engine failure.