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Can't get my gas trimmer running... what am I not thinking of?

Post in 'DIY and General non-hearth advice' started by Bret Chase, Jul 7, 2013.

  1. oldspark

    oldspark Guest

    Bad Wolf, sounds like it could be crank seals, sorry I see it is only 2 years old so crank seals last way longer then that, sure sounds like it is not pulling the gas in like its supposed to.

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  2. Bad Wolf

    Bad Wolf Feeling the Heat

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    Just checked with the Sears store and I bought it April 2012! So they are getting it back!
  3. MasterMech

    MasterMech Guest

    That sounds a lot like a plugged exhaust. Not the only thing that it could be but it's having trouble breathing and all the "ins" are clear......
  4. Clarkbug

    Clarkbug Minister of Fire

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    When you rebuilt the carb, did you pull the welch plug to clean out those passages as well? If possible, do you have an ultrasonic cleaner to put the carb in? Any chance that when the fuel lines were getting re-connected you have one swapped to the wrong port?
  5. maple1

    maple1 Minister of Fire

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    Our Jonsered is still dead, with new coil.

    Looking real close at the flywheel end, there might be some play in a bearing too.

    I think it lost a crank seal - even with not getting any gas it all, it should give more than a one-stroke 'sput' with a squirt of fuel in the carb throat. A leak down tester is on my list of things to get anyway, but not sure when that is going to happen - this one might be going to the dealer.
  6. Clarkbug

    Clarkbug Minister of Fire

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    Maple,

    Might be worth posting a new thread in the "Gear" section to try and get some more views/advice.

    Since you are feeling some possible play in the flywheel, any chance it sheared a flywheel key and you are detecting some play there? Put it out of time enough to cause your issue? Any chance that some of the wires connected to the kill switch is grounding out and causing the issue?
  7. Bret Chase

    Bret Chase Minister of Fire

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    Yes, I pulled the welch plug, no I don't have an utrasonic cleaner. The fuel line can only be hooked up one way
  8. MasterMech

    MasterMech Guest


    A shot in the dark here, but drop a teaspoon of oil in the cylinder and try again. If it fires up then you most definetly have a compression issue. Another long shot is to make sure the carb is receiving an impulse signal from the crankcase. Wouldn't be the first time I've seen a gasket in a rebuild kit that's missing a critical hole or two. ;)
  9. maple1

    maple1 Minister of Fire

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    The possible play in the end of the crank was noticed when we pulled the flywheel off to check the key. Key was OK, so timing should be good. Lots of fire at the plug too. Seems to be lots of compression. No seepage behind the flywheel. I've never had a bush saw apart, haven't searched for a manual yet. Just the hours wasted so far chasing this thing is telling us we should have taken it to the dealer to start with (they're decent). I can handle the 'simple' stuff, usually (fuel & carbs etc.) - but the patience has been all used up on this one I think.

    Might be time for a new saw anyway ...

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