Model Compatibility: Fits GX31, GX35, HHT31S, HHT35S, and FG100 engines as a direct replacement for the 9T clutch drum component. Part Designation: Identified as a 9T clutch drum matching the specification for the listed engine models. Functional Purpose: Restores clutch drum in GX31, GX35, HHT31S, HHT35S, and FG100 engine assemblies. Application Scope: Designed exclusively for use with GX31, GX35, HHT31S, HHT35S, and FG100 small engines. Installation Requirement: Mounts in the same location and orientation as the 9T clutch drum on compatible engines.