Mercury F3AZ-8620-A V-Belt

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Accessory drive belts, also known as fan belts or V-belts, play a crucial role in the functioning of an engine and its accessories. Maintenance of their condition and tension is important to avoid issues of wear on bearings, noise, and belt failure. Belts lose their rigidity with time, therefore requiring regular checks and adjustments. It is necessary to inspect for cracks, glazing, fraying, or separation. Use the "rule of thumb" or gauge to measure tension. To adjust, move the bracket of the belt-driven accessory. Belt-tensioned devices rely on tensioners. Worn-out belts can be identified by examining wear indicator marks. While replacing them, slide off old belts and fit them into pulley grooves correctly.

The condition of drivebelts can be checked by looking for cracks, separation of belt plies, fraying, and glazing. For serpentine belts, the ribs on the underside of the belt should also be checked.

To replace the tensioner, remove the drive belt, remove the tensioner mounting bolt, remove the tensioner from the engine, and then install the new tensioner by reversing the removal process.

Adjustments to non-auto-tensioned belts involve moving the belt-driven accessory on its bracket using adjustment and pivot bolts.

The number of belts used on a vehicle depends on the accessories installed.