Crankshaft Main Bearing for 2026 Sea-Doo LTD 18-300 1630 - Replaces 290933455

Crankshaft Main Bearing for 2026 Sea-Doo LTD 18-300 1630, a direct replacement for OEM part number 290933455.

Crankshaft main bearings support the crankshaft in the crankcase, carrying the load of the engine while allowing the crank to spin freely. Worn main bearings cause knocking, vibration and can lead to catastrophic engine failure.

When You Need It

• Deep knocking from the bottom end
• Excessive crankshaft play
• Low oil pressure (four-stroke)
• Any bottom-end rebuild

Fitting Tips

• Replace main bearings as a set
• Check bearing clearances with plastigauge where applicable

Product Details

• Part Type: Crankshaft Main Bearing
• Replaces OEM: 290933455, 290933465, 420933455, 420933456, 420933465, 420933466
• Brand: Aftermarket
• Condition: New
• Suits: 2026 Sea-Doo LTD 18-300 1630

Please compare the OEM number with your original part before ordering. Contact us if you need help confirming the right part for your watercraft.