07HAH-PJ7A100 5.5MM Guide Reamer - Overview. The 07HAH-PJ7A100 5.5MM Guide Reamer is a specialized tool designed for use in Honda marine engine systems. It serves the crucial role of precisely reaming a 5.5mm valve guide, supporting accurate valve stem-to-guide clearance inspection and maintenance to keep your marine engine running reliably. Engineered to meet factory specifications, this reamer integrates seamlessly with existing components, ensuring optimal performance and durability.. Key Fea