Echo pb 755 h No power

Discussion in 'Mechanic and Repair' started by debtom, Feb 24, 2012.

  1. debtom

    debtom LawnSite Member
    Messages: 11

    Starts fine, plug is clean, fuel filter is clean. won't generate power. Any helpful ideas, I don't need to get ripped off by a repair shop. Thank you
  2. Landrus2

    Landrus2 LawnSite Fanatic
    Messages: 5,050

    you can try to take your muffler off and clean the exhaust port :waving:
  3. MowerMedic77

    MowerMedic77 LawnSite Bronze Member
    Messages: 1,164

    I have seen a few of these come through with major crank bearing failure(I check every one that comes in before any other repair is done!) if the area around your recoil is oily at all, pull off the recoil and grab the pawl/catcher assembly with your hand and see if you can feel any up and down play.....if a new unit......sorry not a fan of this model from echo.
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  4. CT18fireman

    CT18fireman LawnSite Senior Member
    Messages: 611

    Does it run better with the choke half on? If so its the mixture screw. They usually last about two years from factory then they get dirty and won't make power. I have 5 of these. 3 I bought off for cheap off guys who thought they were junk.

    To fix you have to set a small drill bit to remove the small plastic plug on the side of the carb. Then you will see a flat head screw mixture plug. I take them out, clean the plug and hole then put back in. Start it and adjust screw to get the best idle. Too far in or out and it will go lean or rich and idle will got down.

    Another option is to replace carb but it will crap out in a year or so.

    This is part of the annual maintenance on our 755s now. They run great.
  5. debtom

    debtom LawnSite Member
    Messages: 11

    Thank you for the replies.

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