Briggs Pulsa Jet carburetor issue - won’t pull fuel up?

Hammermechanicman said:
If it is rust you may be fighting a losing battle. You can remove the tank and put a big handful of machine nuts in it and shake it for a few minutes or put it in a vibratory cleaner to shake it then rinse it out a half dozen times and hope you get the loose rust out.
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The problem with that is that the 3 qt tanks have plastic inserts and sometimes even a section of foam to prevent sloshing fuel.
 
Most those engines are old enough the yellow mesh is deteriorating. I pull it out of anything that comes in with it. They will run fine without it. Go cart racers never needed it to stop fuel slosh.
 
Just a thought, if it is a pulsa-jet carb, directly mounted on the tank, you may have an air leak between the carb and the tank. This would not allow the pump to work properly, pulling up the fuel into the tank reservoir. If the gasket doesn’t seal, as a last resort I’ve sealed the area outside the carb, with a gas resistant silicone sealer.
 
StarTech said:
The problem with that is that the 3 qt tanks have plastic inserts and sometimes even a section of foam to prevent sloshing fuel.
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Mine does have the stupid plastic insert. I can't imagine why fuel sloshing matters. I don't know how I would remove it though, because the filler hole is a smidgen smaller than the plastic piece.
 
Rivets said:
Just a thought, if it is a pulsa-jet carb, directly mounted on the tank, you may have an air leak between the carb and the tank. This would not allow the pump to work properly, pulling up the fuel into the tank reservoir. If the gasket doesn’t seal, as a last resort I’ve sealed the area outside the carb, with a gas resistant silicone sealer.
Click to expand...
I made a cork gasket, which is quite thick, and it seems to be allowing it to work now.
 
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