HTD Belt 28.346in Long 20mm Wide

The Jones Racing Products HTD Belt 28.346in Long 20mm Wide (Part Number 720-20 HD) is a synchronous drive belt engineered for high-precision power transmission in marine propulsion systems and auxiliary equipment. Built with HTD (Helical Tooth Drive) profile and 8mm pitch, this belt delivers positive engagement without slippage—critical for applications where reliable torque delivery at consistent RPM is non-negotiable. The 28.346-inch length and 20mm width make this a direct fit for specific marine engine configurations where OEM specifications demand exact dimensional match.

The HTD tooth profile minimizes backlash and ensures smooth power transfer between crankshaft, blower, alternator, or pump components depending on your engine layout. The 8mm pitch is a standard marine specification that accommodates mid-range pulley sizes common in recreational and light commercial boat engines. At 0.2 lbs, this belt is lightweight enough for standard installation without requiring additional support hardware. Salt-air environments demand materials that resist corrosion; confirm material composition with the manufacturer if your vessel operates in high-salinity conditions where standard rubber compounds may degrade faster than freshwater applications.

This replacement belt suits both routine maintenance on established powerheads and retrofit scenarios where engine configuration upgrades require exact specification matching. Weekend anglers performing seasonal engine service and commercial operators doing planned preventative maintenance will find this belt essential for restoring factory-spec belt tension and drive reliability. Carry a spare on extended offshore trips where drive belt failure without backup creates safety risk; the compact dimensions (3.65 x 0.85 x 12.5 inches) allow storage in standard toolboxes. Verify your engine's pulley arrangement and belt routing diagram before ordering to confirm this 28.346-inch length aligns with your specific application.