Atlantis A4075 Mikuni Single Carburetor Primer Kit Fits All Personal Water Craft with 6 mm choke shaft Mikuni Single Carburetors Primer kits replace restrictive choke assemblies and cure hard starting motors Draws fuel from the fuel line to give the carburetor a blast of fuel for easy starting Butterfly choke valves still restrict airflow even when open, primer kits remove them, freeing up horsepower Each kit comes with plenty of clear polyurethane hose that is fuel resistant and takes temperature to 180 degrees, comes with all fittings and tees and zip ties to prevent leaks