Balmar Pulley Kit f/Yanmar 2GM20-F, 3GM30-F, 3GM-F [48-YSP-3GM-B] Marine Plumbing & Ventilation | Thru-Hull Fittings They make an excellent spare

They make an excellent spare or storm anchor for your boat or yacht

The low profile wall indicator ensures there are no protruding switches for an unobtrusive look on a vessel

Bulk: Replaces 70–80% of the battery’s state-of-charge at the fastest possible rate

Refresh Rate - 25/30Hz

Balmar Pulley Kit f/Yanmar 2GM20-F, 3GM30-F, 3GM-F [48-YSP-3GM-B] Marine Plumbing & Ventilation | Thru-Hull Fittings They make an excellent sparePulley Kit for Yanmar 2GM20 F, 3GM30 F, 3GM F AltMount Serpentine Pulley Conversion Kit for Yanmar Diesel Engines Yanmar Engines Covered: 3GM30 F, 3GM F Kit Includes: Three Ten Groove (J10) Pulleys, Two J10, 40 Circumference Serpentine Belts (one spare) & Mounting Hardware Note: If you specify an AT 200A Alternator, a longer belt length may be required. This product may not be returned to the original point of purchase. Please contact the manufacturer