MENUCall: 716-304-8590
Marine Smart Energy logo

Electromaax Nanni Belt Tensioner


SKU: ST101-NANNI Category:


To further enhance the performance of our alternators we now offer a belt tensioning device specifically for Nanni marine engines. This simple device eliminates the need to tension the belt using a stick or screw driver that requires the installer to have three arms. Now with the turning of a bolt you can easily achieve the perfect belt tension level for your Nanni engine.  TENSIONER WILL NOT WORK ON ANY V-BELT CONFIGURATION!

Key Benefits

The belt will never slip as the alternator is held firmly in place. It eliminates slippage and greatly increases belt life. Simple replacement bolt on – no additional brackets, and a Universal fit on most Nanni marine engines.  The tensioner on its own will not eliminate belt dust!

Exact fit, the engine runs quieter, and it’s the most effective when combined with our Serpentine Pulley Upgrade Kits.


For higher amperage alternators (over 70 amps) this devices needs to be combined with our Serpentine Pulley Upgrade Kit manufactured by ElectroMaax for your specific Nanni engine.