I bought an OS 40 fp yesterday at a swap meet. I need to to order a venturi and NVA from Tower, which venturi? I know some use the small venturi on the LA46, does it work on the 40 fp as well? I also need to replace a broken plastic backplate on a LA46, does anyone have the Tower part # for a metal replacement? I did some research on it yesterday but the part number(40 fp part#) showed a backplate for a .21 car engine.
Thanks
Steve