Posted by Steve@Advance on June 01, 2021 at 12:58:45 from (24.182.105.128):
In Reply to: Why do floats stick posted by SDE on June 01, 2021 at 10:47:27:
Most carbs have a screen in the inlet fitting where the fuel line connects, the last stop before the needle valve.
Should also be a screen on top of the sediment bowl, and a screen standing up inside the tank where the sediment bowl screws in.
Even with all the screens in place, a trashy tank will still manage to get something in the needle valve, it only takes a tiny speck of rust.
Other causes are a partially sunk float, a loose or damaged needle valve (especially the rubber tip, it can be damaged by rust flakes getting embedded into the rubber), the float touching the inside of the bowl, or improperly set.
If you end up going into the carb, before putting the bowl on, turn the body upside down with the weight of the float on the needle valve. Suck on the fuel fitting, put your tongue over the hole. If it won't hold vacuum, it will not stop the fuel flow, something is leaking. Be sure the float tab is pushing the needle and not bottoming against the end of the seat, also be sure the needle is not binding inside the seat. Aftermarket parts are commonly not exactly right. Easy to burr the brass seat with a screw driver when tightening it.
Once the tank is clean and all screens in place, be sure to blow out the line. I like to turn the gas on, let it flow a few seconds to flush any debris out of the line. You can even leave the gas running while connecting the line to the carb, especially if the area is caked with dirt.
Since it flooded over in the short time it was left on, the problem should be fairly obvious. That is a substantial leak. It was probably not running well, too rich.
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