This forward gear is designed for 2 horsepower marine outboard engines. It serves as a compatible replacement for the original part number 646-45560-00, functioning as a key component within the lower unit's drive gear system. Manufactured to meet technical specifications, this component is intended to restore proper forward gear operation in compatible ultra-small engine models. Prior to installation, please verify your engine's exact model, production year, and existing gear configuration to ensure correct application.