Recommended for ALL carbureted engines. Don’t trust the in-tank fuel filter to filter out all debris. These filters have rescued me from many headaches caused by faulty in-tank petcock filters. NOT for fuel-injected motors. Ever wonder what the fuel looks like before it enters the carburetor? Now you can see it and the debris trapped by this ingenius filter. Clear nylon housing and sintered bronze element. 1/4″ barb fitting.