CRANKSHAFT BEARING YAMAHA 93306-206V500

Function and technical context

The crankshaft bearing is a critical component of the engine's lubrication system that supports and allows the rotation of the crankshaft, the main shaft responsible for converting the reciprocating movements of the pistons into continuous rotation. This bearing operates under constant lubricating oil pressure, supporting extreme dynamic loads resulting from combustion and crankshaft rotation at thousands of revolutions per minute. Premature bearing failure or wear causes excessive friction, increased oil temperature, loss of engine power and, in severe cases, crankshaft seizure and irreversible damage to the engine block.

When to replace this part?

Crankshaft bearings should be inspected regularly during periodic maintenance; Symptoms of wear include metallic noises or knocking in the engine block, reduced oil pressure indicated on the gauge, bluish smoke in the exhaust, and abnormal engine vibration at idle. Although these bearings are designed for a long useful life, it is advisable to replace them preventively every 1,500-2,000 hours of operation or if any anomaly is detected in the lubrication parameters; Preventive replacement avoids costly engine repairs in high altitude navigation or intensive use.

Equivalent manufacturer part numbers