Trimmer Problems

Discussion in 'Lawn Mowing' started by Cuttinitclose, Jun 7, 2009.

  1. Cuttinitclose

    Cuttinitclose LawnSite Bronze Member
    Posts: 1,016

    This will probaly be moved to the Mechanic section, but well see how many awnsers I can get before they notice. Anyway, My JD trimmer idles fine but when you give it gas exspecially full throttle it wants to die. I'm running Amsoil Saber 50:1 in it and recommends 50:1 so its not the mix. Any ideas?
     
  2. 4.3mudder

    4.3mudder LawnSite Silver Member
    Posts: 2,227

    Either fuel restriction, carb out of adjustment, or a plugged up muffler. I would look into the muffler first. If it is clean, the high speed might need to be adjusted on the carb. I would make sure no fuel lines are kinked and the fuel filter is clean.
     
  3. 4.3mudder

    4.3mudder LawnSite Silver Member
    Posts: 2,227

    I forgot to mention, even though the trimmer recommend 50:1, you can use the Amsoil Saber at 100:1. It is synthetic.
     
  4. Cuttinitclose

    Cuttinitclose LawnSite Bronze Member
    Posts: 1,016

    I don't know much about motors and that but my grandpa is good at them so I will have him help me. Thanks! Anyone else ideas?
     
  5. Ford4Ever

    Ford4Ever LawnSite Member
    Posts: 71

    try running your oil at 80:1 or 100:1
     
  6. Cuttinitclose

    Cuttinitclose LawnSite Bronze Member
    Posts: 1,016

    Took the screen off the muffler and works fine now.
     
  7. dishboy

    dishboy LawnSite Platinum Member
    from zone 6
    Posts: 4,164

    Start with the easy and cheap first. Pull the muffler and decoke the exhaust pot and muffler. You can use a dull small screw driver to do this in the port, BE CAREFULLNOT TO SCRATCH THE PISTON OR CYLINDER WALL! When you are finished you can remove the plug and use compressed air to blow out the cylinder from both holes. You can use a larger screwdriver to reach every thing in the muffler you can knock loose and then tap the muffler on concrete until carbon stops coming out. Be careful not to dent the muffler. Next throw away your fuel filter and replace with a new one if it has been in there more than six months. Also check that the fuel line inside the carb has not wore or chaffed where it rides in the bottom of the tank. Still no go replace the plug . If these things do not resolve your issue you will have to clean all the passages in the carb with carb cleaner and blow out with compressed air. If you have never done this get somebody who knows how to show you. If the cleaning does not cure the problem go back into the carb and replace the diaphragm. Another thing to check is the tank vent, if it plugs, no air out , no fuel in.
     
  8. dishboy

    dishboy LawnSite Platinum Member
    from zone 6
    Posts: 4,164

    I did not see that , anyway now you know my method of keeping the trimmers out of the shop.
     
  9. bighaydenslawn

    bighaydenslawn LawnSite Senior Member
    Posts: 516

    Thought you got an FS 90R.......
     
  10. Cuttinitclose

    Cuttinitclose LawnSite Bronze Member
    Posts: 1,016

    I have both.
     

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