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I ran a tank of gas through my fine 10550 LB this weekend and after a break and a re-fill, I cranked the 'boy and it ran at about 1/3rd throttle and a bit rough! Being careful, I reached in with my finger and touched the governer air vane and the Duraforce came to life - yippie!

My question is - what causes this? Do I have a weak spring or can this be caused from dirt/grime over time? I hate to put a drop of oil in such a dusty place.

Looking for tips/suggestions.

Thanks in advance!
Bill
 

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Lawn-Boy fan
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There could be crud on the air vane or thereabouts causing a bind. Also, the primer line if it isn't in its retainer at the carb and main fuel line, can have a tendency to interfere with the air vane. Spring could be weak, I've heard people talking of that but I haven't experienced it first hand on any of my duraforces.
 
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