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I have a craftsman trimmer that I've not used in years. I'm using semi-old fuel mixture so I definitely know that may be contributing but I think this happened when I was using it prior to this.

Here is a video I recorded of the problem. Please any input is greatly appreciated!

http://youtu.be/yWNnHRqjFF4

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can you jockey the throttle button to keep it running? –  mike Jul 6 '13 at 0:56
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Probably a better fit for gardening.stackexchange.com –  Steven Berkovitz Jul 6 '13 at 1:28
    
@Steven - i agree –  mike Jul 6 '13 at 3:06
    
I don't think its a fit at gardening, either. It would have been a fit at small engine repair, but it died a lingering death in Area 51 –  HerrBag Jul 6 '13 at 12:42
    
Gas filter or partial line blockage? Do you have to wait a while before it'll start up again? Throttle seems to work, so trimmer's apparently OK, when it can get the fuel it wants. Might be a very dirty air filter choking it for air, but that usually prevents starting at all. –  Wayfaring Stranger Jul 6 '13 at 13:09
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migrated from diy.stackexchange.com Jul 6 '13 at 13:55

This question came from our site for contractors and serious DIYers.

1 Answer

up vote 3 down vote accepted

You must drain the old fuel mix before doing anything, it can make a world of difference. Old fuel leaves nasty deposits that mess up the carb operation. You'd be well served to clean out the entire fuel system with carb cleaner and replacing all filters. Replace the spark plug while you're at it.

With hopefully a clean system and new plug, and certainly fresh fuel mix and clean filters, try it again, it may work fine. If not, you may just need a minor carb adjustment. You typically need to locate the slow idle mixture screw. I'm not familiar with this engine, so the procedure may vary. Check the owner's manual, they should have a section on idle adjustment. One typically adjusts the idle screw so the engine runs fast enough to not stall, but not so fast the head turns.

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Thank you, this was the problem. Working much better! –  Joshua Rountree Jul 7 '13 at 2:02
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