Yamaha Golf Cart

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  #1  
Old 07-24-15, 06:31 PM
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Yamaha Golf Cart

Our 1987 Yamaha G2A Golf cart quit running. We removed the fuel pump and cleaned it out - took it apart . When we put it back on it still won't start and it fills the oil full of gas and pumps gas into the air filter. We drained the oil and put in new oil. Then we purchased a new fuel pump, installed it, attached the hoses, started the cart and it ran for about 10 minutes . Started it again following morning and the crank case was full of gasoline again. Filled the air filter half full of gas. Not sure what to do to correct this problem.
 
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Old 07-24-15, 07:25 PM
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Welcome to the forums!

I moved your post to its own thread. That way it will get the attention it deserves.
 
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Old 07-25-15, 05:20 AM
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Your fuel pump is fine. You have a carburetor problem. Probably the needle valve and float are not cutting off the flow of fuel into the carburetor. Maybe a piece of track is caught in the needle valve preventing it from closing properly or it could be a worn needle (part #22), it's seat or maybe the float (part #9) is broken or misadjusted.

 
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Old 07-25-15, 10:55 AM
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87 yamaha golf cart

Thanks for your response. Do you think we have damaged motor by having gas flow into the oil? We changed the oil again. We now have it running but smoke is now coming out the exhaust. Will that eventually stop once it burns off ?
 
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Old 07-25-15, 11:03 AM
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I would think so, yes. If this is not a two stroke motor, you should change the oil.
 
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Old 07-25-15, 12:25 PM
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Stop running the cart until you get the carburetor fixed. It's allowing so much fuel through the carburetor that there is liquid gasoline getting into the cylinder instead of the vapor it should be. The gas washes down the cylinder walls and removes the thin film of oil that protects the cylinder and piston. Then after the gas does that bit of nasty it gets into the oil diluting it which is bad for everything else in the engine like the crank, connecting rod, cams... So, even though it runs you should not run it until you get it fixed. Luckily it's often a pretty easy thing to fix.
 
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