YAMAHA BELT 69J-46241-00 REC69J-46241-00

Function and technical context

The belt is an essential component of the power transmission system in Yamaha and Mercury outboard engines. It transmits the rotation of the crankshaft to the auxiliary systems, especially the cooling water pump and the alternator, ensuring that the engine maintains a constant circulation of coolant and an adequate electrical charge throughout operation. A failure in this belt immediately interrupts the cooling flow, which can cause catastrophic overheating of the engine in a matter of minutes, especially in intensive sailing conditions or in warm waters where thermal demand is maximum.

When to replace this part?

Transmission belts show clear signs of wear: visible cracks on the surface, fraying of the edges, loss of tension (audible slipping or abnormal vibration) and a characteristic smell of burning rubber during operation. It is recommended to inspect the belt at each seasonal inspection and replace it preventively every 500 to 800 hours of operation or when any sign of deterioration is observed, since a break while sailing prevents the engine from cooling properly and can cause extensive irreparable damage. Preventative replacement avoids costly repairs and emergency situations at sea.

Compatible Yamaha engines

Equivalent manufacturer part numbers