Posted by Steve@Advance on August 28, 2019 at 19:02:39 from (66.169.147.211):
In Reply to: Needles and seats.... posted by Dave H (MI) on August 28, 2019 at 18:45:54:
If it stopped dripping, I would give it the benefit of the doubt that whatever was causing it has passed.
It only takes a microscopic piece of trash to hold the needle off the seat.
Another trick, drain the carb or run it empty with the fuel valve off. That will let the needle drop, the flood of fuel when the valve is turned on may wash out whatever was in there.
If the flooding continues, then go back in. Check the float, give it the "shake test" for fuel inside one of the pontoons. Check the float level. Clean the seat with a Q tip. Incpect the needle with a magnifying glass. With the upper housing inverted, the weight of the float resting on the needle, suck on the fuel fitting, put your tongue over the hole. It should hold vacuum. If not, there is a leak somewhere.
When I get the carb back on, I like to flush the line with gas before connecting it. Turn on the fuel valve, let gas run through the line as it is connected. This is especially important on a working tractor that is less than sanitary, or one that the fitting is difficult to see or connect.
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