Echo hydrolocks in between mowing days

Discussion in 'Mechanic and Repair' started by LandscapePenguin, Apr 11, 2010.

  1. LandscapePenguin

    LandscapePenguin LawnSite Member
    Messages: 38

    I go to start my Echo edger and the cord is very hard to pull and gas comes spraying out of the muffler when I finally do get the cord to move. I can sometimes get it started by unplugging the fuel line from the carb and pulling the cord until it fires, then plugging the fuel line back in. When I unplug the fuel line, gas squirts from it as if the fuel-tank is under pressure.

    Once it's running, it typically runs fine until a day or so later when I go to use it again and I'm right back at square one. What do I need to replace to make this stop happening?
  2. GlynnC

    GlynnC LawnSite Senior Member
    Messages: 913

    Sounds like the needle valve in the carb is not closing properly, allowing gas to seep into the cylinder. A carb cleaning is needed, remove, disassemble, spray all holes, openings--especially the needle seat area. Blow out with low pressure compressed area. Reassemble and see if this solves the problem.
  3. fixer67

    fixer67 LawnSite Silver Member
    Messages: 2,098

    gas squirts from it as if the fuel-tank is under pressure

    I would say that is the problem. The fuel cap is not venting correctly. Pressure is building up and forcing gas past the needle. Try a new cap or leave the cap a little lose from one day to the next to see if it is the cap.
    Last edited: Apr 11, 2010
  4. GlynnC

    GlynnC LawnSite Senior Member
    Messages: 913

    I don't think Echo gas caps are vented--at least the ones I've used/worked on. They have a 3rd line that does to a vent valve (little white thing)--it's a one way valve, allows air in but not gas out. Yes, that means pressure builds up in the tank, but the needle valve is suppose to hold this without allowing fuel into the carb.

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