31142-PD1-004 Pulley Lock Nut - Overview. The 31142-PD1-004 Pulley Lock Nut is an essential hardware component in Honda marine engine systems. Designed to securely lock pulleys onto shafts, it prevents loosening or dislodging during operation, maintaining consistent mechanical motion and system stability. This OEM pulley lock nut ensures seamless integration with existing parts, maintaining optimal performance and durability.. Key Features. Specifically designed as a pulley lock nut to fasten pulleys in place.. Genuine OEM Honda part ensuring factory-specified materials, dimensions, and tolerances.. Prevents pulley loosening, ensuring reliable alternator and accessory operation.. Precisely matches factory specifications for fit and durability.. Integrates cleanly with existing shafts, seals, and housing for a flawless fit.. Maintains expected durability and performance in marine engine conditions.. Why Choose Genuine OEM. Using original Honda parts like the 31142-PD1-004 Pulley Lock Nu