Quote:
Originally Posted by Robb235
I didn’t mess with the floats when I cleaned the carbs. Just shot carb cleaner through the passages and cleaned (or replaced) the jets.
What are the float valves? Is that the needle valve?
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Shooting carb cleaner through the passages is often not enough to get them clean, so beware of that.
I suppose you shouldn't have been working on carbs without knowing what the float valves are, but they are the combination of floats, float needles, and seats that regulate the level of fuel in the float bowls. The floats raise the needles as fuel flows into the bowls, and when the level reaches the set height, the needles are pushed into the seats to block incoming flow. If that isn't working, fuel keeps coming in and ends up coming out the overflow tubes.
"Needle valve" is a generic term for a type of valve. Our 250 carbs have needle valves in multiple places including the float valves, the idle mixture valves (often called "idle mixture screws"), and the midrange metering system that uses needles and needle jets.