Stainless Throttle Handle Upgrade your older Edson controls with these stainless replacements. Highly polished, marked Fast-Slow . Can be easily retrofitted onto existing Edson engine controls. Includes mounting screw. IMPORTANT: These handles are only for Edson’s Dual Lever Engine Controls. Older pedestals (pre-1980) with 10-32 set screw threads must be retapped to 1/4″-28 in order to accept the mounting screws supplied with these handles.