Fuel wont fill up the sediment bowl, unless I loosen it. 850

(quoted from post at 00:44:01 10/09/18) That is normal for a gravity fed fuel system.

If the carb float bowl is full when you R&R the sediment bulb there is no need for fuel flow. Start the engine or remove the drain plug from the float bowl and normal gas flow will resume which will fill the sediment bulb.

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(quoted from post at 00:09:05 10/09/18) It's an 850.

This is with the tractor off.

Fuel flows normal when the sediment bowl is not in place.

When I put it back on, tighten it down, and then open the fuel valve, no fuel will flow into the bowl. I have to loosen the sediment bowl a little, which lets the fuel start flowing, and once it fills up I tighten it back.

Is this normal? I feel like in the past it would fill up just from gravity, even if I had the bowl screwed in real tight, but I cant remember. I can start the tractor and it 'seems' to run ok, but I have to fiddle with the choke a bit.

I guess when the tractor is running it creates a vacuum and sucks the fuel in? Or is something screwy going on, and should it flow freely even if the sediment bowl is screwed on tight?

Hope I have explained it well... I can take a video.

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