Last fall, my 50 8N was dripping gas from where the fuel line goes into the right filter screen on the carb. The knob on the shutoff was closed tight. I disconnected the fuel line from the filter and saw a steady drip, about 1 every 5 seconds. I drained the tank and tried cleaning the valve with no success. I just replaced the whole sediment/valve assembly with a new one from Just 8Nís and applied Gasoila. It sat for about a week. I started to put the bowl on and touched the hole on the bottom of the assembly and felt a drop of gas. The tank was still drained and the knob was closed. I havenít tried to put any gas in the tank yet. The valve I replaced was also new from Just 8Nís and installed about 3 years ago. Anybody else have problems with the quality of these valves?