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Engine not getting fuel

My engine won't stay running. It will start everytime I spray some starting fluid into the choke, but will quit as soon as that fluid is burned off. This is my first 2 stroke engine, and don't know if has gunk in the lines or a bad pump.

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  • miller4519 Jun 15, 2009

    It's a 1971 Mercury kiekhaefer 4hp. (Merc 40).

  • miller4519 Jun 16, 2009

    Yes, the arrow is in the right direction and the fuel flows out of the line when its disconnected. The fuel is new with a 50:1 ratio. I took apart the fuel pump and cleaned all the parts and everything looks fine except for a black diaphram inside. I don't know how the fuel makes it through this diaphram or what it's purpose is?

  • miller4519 Jul 03, 2009

    Ok, I rebuilt the fuel pump and found that I wasn't getting a spark anymore. So I changed the spark plug and the ignition coil. It started about six times after the change and now "nothing". Do you think I got a bad coil or possibly something in the flywheel?

  • miller4519 Jul 04, 2009

    I also wondering if you thing it's possible that the starting fluid could have seized up the engine keeping it from sparking any other fluid?

  • Dean
    Dean May 11, 2010

    Thats probably a vacuum style fuel pump. Really all you can do is take off the first cover of the fuel pump and make sure fuel is at least getting to the fuel pump by again, removing the fuel pump cover and squeezing the primer bulb to make sure fuel is coming from the fuel pump cover. If it is making it there, then the problem could be within the fuel pump itself or in the carburettor bowl or carburettor float. It sounds like the passage from the carby to the cylinders is clear as it is sucking up the starter fluid ok into the combustion chambers.

  • Dean
    Dean May 11, 2010

    If you remove the fuel hose, and squeeze the primer bulb on the fuel line, does fuel come out of the connector to the motor?Also check the primer bulb is installed correctly with the arrow on the primer pointing toward the engine in the line. Could also be fuel pump problem, or even old, stale fuel if you are not using fresh mix.

  • Dean
    Dean May 11, 2010

    If obviously has spark and electricals if it is starting up and kicking over so yes likely to be a fuel flow issue. What brand outboard and how many horsepower?

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There may be a screen in the tank pickup. Since you are new to 2 cycles- swish the tank back and forth before using it to remix the oil. You can open the fuel pump and see if it has something in it. If you have the motor connected to the fuel line when the fuel pump is off you can blow through the fuel line to see if it is clear. Remember there are check balls in the connectors and you need to have the hoses connected to get flow.

Posted on Jun 16, 2009

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