I started the process of checking and adjusting the floats on my Weber 40's the other day and all went well until..... Upon rechecking that they were all 'spot on' I found that one of them is erratic. If I check it 3 times it might measure differently each time. By now I have checked it MANY times. Sometimes it measures 'in the ballpark' in the gage, the next time nothing at all, the next time close and then rises and overflows the gage and then drops down to above normal. Most times it overflows the gage. This is in spite of changing shims and/or adjusting the float tab in-between tests. I do have fuel that has overflowed into the carb throat. I'm stumped, does anyone have any in-site?
Thanks John