Carburetor Replacement (Trimmers)

Discussion in 'Mechanic and Repair' started by Russo Power Equipment, Jul 2, 2013.

  1. Russo Power Equipment

    Russo Power Equipment LawnSite Member
    Posts: 38

    Here at Russo, people are replacing their trimmer carbs and primer bulbs (mainly stihl and echo) left and right. What are some good tips to prevent early replacement and what typically goes wrong with them? Could most people fix them on their own?
     
  2. dutch1

    dutch1 LawnSite Silver Member
    from Jayhawk
    Posts: 2,231

    Are you speaking of commercial or home owners or both.

    The first step for avoiding small engine carburetor problems is to avoid the use of ethanol laced fuels--get straight gas if possible.

    There is a website that lists stations that to sell straight gas--if I remember correctly, I think it's www.puregas.org. If not someone will correct the addy.

    My suggestion is to run, then drain fuel and restart to run dry--on any equipment that is going to be idle for an extended period. Your mileage may vary.

    Ethanol contributes to corrosion as well as leaving deposits. In addition, ethanol is a water attractor--as a result it absorbs moisture from the air.
     
    Last edited: Jul 2, 2013
  3. ed2hess

    ed2hess LawnSite Fanatic
    Posts: 12,963

    Pretty simple......don't ever ever replace a carb on echo equipment until you learn where to find the adjustment needles and turn a screw driver CCW to give more gas.
     
  4. zturncutter

    zturncutter LawnSite Bronze Member
    Posts: 1,308

    Exactly, most carbs are probably replaced for no reason other than lack of knowledge.
     
  5. dutch1

    dutch1 LawnSite Silver Member
    from Jayhawk
    Posts: 2,231

    Ed and Zturn, what you guys say is correct to a point. Like you say, Ed, I have found a few that an adjustment will correct the problem. On the other hand, there is no adjustment that can be made to overcome a varnish/crud blocked internal screen. I would guess that at least half of the problems I've encountered in the last 10 years have had that problem--in fact 4 out of 6 units in the last 2 weeks.
     
  6. larryinalabama

    larryinalabama LawnSite Fanatic
    Posts: 16,274

    Ive ordered from you fellers in the past.

    Personally I think the reason people replace the carburators is anyone can do it and its usually cheaper than taking it to a shop.
     
  7. Think Green

    Think Green LawnSite Silver Member
    Posts: 2,746

    Ed,
    Educate this old dog. On all 4 of my Stihl line trimmers, there is no adjustment needles on the carbs. Where is your secret place for them??
    Let me know!!

    Russo,
    If you find this million dollar answer to your question, then we all will know. It would be nice to purchase ethanol free fuels, but not all locations is available.
     
  8. BigFish

    BigFish LawnSite Silver Member
    Posts: 2,918

    What most of you all seem to have forgotten, or (more than likely) just plain didn't/don't know, is most of the cube type carbs have one or more non-replaceable check valves in em. When they go bad all the rebuild/G&D kits in the world ain't gonna help, nor will tweekin any screws.
     
  9. all ferris

    all ferris LawnSite Bronze Member
    Posts: 1,307

    Why replace the whole carb when you can rebuild for about $10. Carb kits are cheap. I always use ethanol blended fuel because its all I can find around here. I just have to rebuild the carbs every so often and replace fuel lines. No big deal.
     
  10. dboyd351

    dboyd351 LawnSite Bronze Member
    Posts: 1,099

    Exactly! The website address is correct, too.
    The only thing I'd add is ethanol will also deteriorate some rubber parts, like the tips on some jet needles and some fuel lines. Helps to replace fuel lines with Tygon or other ethanol resistant material.
     

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