Posted by Red Mist on October 10, 2011 at 13:36:42 from (67.142.175.27):
In Reply to: farmall m carburetor posted by 1951g on October 10, 2011 at 08:01:29:
Old is exactly right. These are gravity feed carbs so every minor malfunciton with the floats, needle and seat are clearly visible to the eye - and ground. A stuck float on a system with a fuel pump does not show itself visibly nearly so often, since gravity is not allowing fuel to pour through the carb.
That said, ususally when you get them started and drive them a little, the bouncing around and vibration of the engine corrects the malfunction and they are fine - until next time it happens. For that reason, I don't run my carbs out of gas. I do shut off the fuel valve, however. Why? Because just about every time I run them out of gas, the float sticks at the bottom of the bowl and they are pouring gas when I open the fuel valve. Now, if I were going to park the tractor for a couple of months, I'd run the carb dry and deal with the stuck float when I restart them. But, I run my tractors more frequently than that and I've found I have less stuck float issues by not running the carbs dry.
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