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no fuel to carb on craftsman tractor
- Thread starter longear
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Export threadI am experiencing same thing....no fuel to carb replaced diaphragm....good vacuum to pump, no vacuum on fuel line side of pump. applied vacuum to fuel line via vacuum pump and fuel line is good. do these fuel pumps go bad?
bertsmobile1
Lawn Royalty
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- Nov 29, 2014
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- 24,995
Yes.
They are just a diaphragm spring and in the better ones a pair of check valves of the cheaper ones 1 check valve.
To verify the diaphragm blow ( mout presssure ) down the crank case line.
You should blow a little the stop. If you can blow continuously down the line the diaphram is bad.
Try to blow backwards down the fuel line, again it should go a little way then stop.
The diaphram is attacked by some carb cleaners and the little brass filter goes through to the back of the diaphragm and "Caening" it by squirting cleaners into it simply pushes the gunk on the filter into the chamber and on to the diaphragm.
They are just a diaphragm spring and in the better ones a pair of check valves of the cheaper ones 1 check valve.
To verify the diaphragm blow ( mout presssure ) down the crank case line.
You should blow a little the stop. If you can blow continuously down the line the diaphram is bad.
Try to blow backwards down the fuel line, again it should go a little way then stop.
The diaphram is attacked by some carb cleaners and the little brass filter goes through to the back of the diaphragm and "Caening" it by squirting cleaners into it simply pushes the gunk on the filter into the chamber and on to the diaphragm.