Mercury E8DZ-8620-G V-Belt

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The tension of the belt is checked visually. Locate the belt tensioner at the front of the engine on the right (passenger) side, adjacent to the lower crankshaft pulley, then find the tensioner operating marks. If the indicator mark is outside the operating range, the belt should be replaced.

The belt tension in earlier models can be adjusted by moving the belt tensioner or the component. In some cases, adjustment and pivot bolts on the component may need to be loosened before moving the component in the required direction.

The tension of drivebelts in later models with serpentine belts is checked visually.

In later models, automatic tensioners are used to adjust belt tension. However, for some V-belts and early serpentine belts, manual adjustments are required.

To replace the drive belt, lift the tensioner arm with a ratchet or breaker bar, remove the belt from the auxiliary components, and carefully release the tensioner. Then, route the new belt over the various pulleys, rotating the tensioner to allow the belt to be installed, and release the belt tensioner. Make sure the belt fits properly into the pulley grooves.

To replace the belt, lift the tensioner at the bolt. The tensioner will swing down once the tension of the belt is released. Remove the belt from the auxiliary components and carefully release the tensioner. Route the new belt over the various pulleys, again rotating the tensioner to allow the belt to be installed, then release the belt tensioner. Ensure the belt fits properly into the pulley grooves - it must be completely engaged. Most models have a drivebelt routing decal on the upper radiator panel to help during drivebelt installation.

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.