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Old 08-14-2020, 05:34 PM   #1
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Generator Fuel Issue

After a long complicated procedure, I can start the generator and it runs as advertised. Next day it will start and run fine until the carburetor fuel chamber goes empty. The fuel line to the fuel pump is dry. All connections are tight and a new fuel pump did not help. I had a mobile mechanic spend several hours without finding the problem. He also called several fellow mechanics and no one came up with a solution. If I disconnect the fuel line and prime the carburetor, then with vacuum pump fill the line from the gas tank, the unit will run.
Any suggestions? Has anyone else had this problem?
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Old 08-14-2020, 06:07 PM   #2
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Can you blow backward into the line and hear bubbles in fuel tank?.......need to be between pump and tank...
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Old 08-14-2020, 06:31 PM   #3
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The vacuum pump you are using has more volume than the small fuel pump. Replace the line to the tank, the hose has cracks and is leaking air in, preventing the vacuum from the pump sucking fuel. Make sure the tank is over 1/2 full. Run a separate 12V line to the pump to test it without running the generator.
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Old 08-14-2020, 08:29 PM   #4
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I agree that you are sucking air somewhere in the fuel line between the tank and generator fuel pump.
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Old 08-14-2020, 11:39 PM   #5
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For quick test get a short length of fuel line and connect gender fuel pump and put other end in a gas can. If it works fuel line is bad.
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Old 08-16-2020, 06:34 PM   #6
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Quote:
Originally Posted by Jyrocharlie View Post
The vacuum pump you are using has more volume than the small fuel pump. Replace the line to the tank, the hose has cracks and is leaking air in, preventing the vacuum from the pump sucking fuel. Make sure the tank is over 1/2 full. Run a separate 12V line to the pump to test it without running the generator.
Agree, to the OP, cracked fuel line is a common problem especially with the blended fuel of today.
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