Echo SRM-2100 Dies under throttle

Discussion in 'Homeowner Assistance Forum' started by RugerRedhawk, May 25, 2012.

  1. RugerRedhawk

    RugerRedhawk LawnSite Member
    Messages: 74

    My echo srm-2100 starts up ok, but as soon as I hit the throttle it dies. At first last year it would only run at about half throttle, but I managed through some light duty work that way. Well this spring it has gotten to the point where i can't do anything with it. Put a new plug in and no gas to no avail. Going to grab a new fuel filter (air filter is good) tomorrow and some 91 octane fuel since I messed up and bought 87. I've never touched the carb adjustment, should I try to adjust the carb? Or is it beyond that? I was thinking about just buying a replacement zama carb, is that a good idea? They only run $40 and if they are simple to install it would be a lot cheaper than paying a shop to mess with it. Thanks in advance for any advice.
  2. Capemay Eagle

    Capemay Eagle LawnSite Bronze Member
    Messages: 1,752

    Sound like the carb could be clogged, but could also be the fuel filter. I buy the Echo maintenance kit for my SRM 210. It has a spark plug, fuel filter and air filter. Good place to start. Are you using any kind of fuel additive? If not you should start adding a little to your premix to help aid any problems from todays new fuel. I use Startron.

    Link for tune up kit
  3. RugerRedhawk

    RugerRedhawk LawnSite Member
    Messages: 74

    Yep star tron in my fuel too. Just regular stabilizer in the past. I already have a new plug and the air filter is clean because I changed it recently. Will grab a fuel filter tomorrow, but will be surprised if that's teh only issue.

    MS_SURVEYOR LawnSite Bronze Member
    Messages: 1,002

    Does it have a spark arrester screen on the muffler? I was using a new RedMax this year when that happened. My boss got a pair of pliers and pulled that screen out. Full throttle again.
  5. RugerRedhawk

    RugerRedhawk LawnSite Member
    Messages: 74

    Thanks I'll take a look. I think it was on the list of things to check in the owners manual, so I'll definitely take a look.
  6. RugerRedhawk

    RugerRedhawk LawnSite Member
    Messages: 74

    Well I threw some 94 octane ethanol free fuel in there along with a new fuel filter. I sprayed out the carb a little and cleaned the vent. Seems to run pretty good now. Still runs better at 75% throttle than 100% throttle, but at least it's running. Wondering if a new carb might be worth the $38 anyway at soem point.
  7. dieselscut

    dieselscut LawnSite Member
    Messages: 7

    isn't your srm-2100 a two stroke?? you are blending your fuel correctly? A little wacky on the ratios makes a big difference in performance. fwiw. :usflag:

  8. RugerRedhawk

    RugerRedhawk LawnSite Member
    Messages: 74

    I was super careful in my mix. This batch was even premixed stuff i bought in a can at the tractor store. That being said it's running pretty good now, but if I go over 75% throttle it bogs down. Probably will just research a car rebuild, or more likely a replacement since they're not even $40.
  9. dboyd351

    dboyd351 LawnSite Bronze Member
    Messages: 1,124

    Did you pull the spark arrestor screen as MS_Surveyor suggested? That's the first place to look. It's probably clogged with carbon, choking off your exhaust flow. You don't have to pull it out for good, just pull it out, flame it with a torch and knock the carbon off with a wire brush, then put it back in.
  10. metro36

    metro36 LawnSite Silver Member
    Messages: 2,417

    There should be some kinda of an adjustment screw on the back of the carb. It shoulds like it might be running a bit too lean. I would try backing that out a bit (1/8 -1/4 turn) then to see how it runs. I have had to do to my echo and shindy trimmers.

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