Zenoah Big Venturi 13.5mm WT-1048 Carb Upgrade for Marine Engines

Big Bore Racing Carb from Zenoah (Walbro WT-1048), Designed for use with Zenoah watercooled (PUM) engines. Contains items shown in photo - Walbro WT-1048 carburetor (very similar to WT-257) but with 13.5mm venturi '(The WT-257 has a 12.7mm venturi).'Zenoah part # 580348901