Does anyone's string trimmer seem slower & less powerful at full throttle in short grass but then rev up in taller grass and weeds?

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  • Updated 2 years ago
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Is the string trimmer supposed to seem less powerful (slower, less kick, quieter) at full throttle in short grass and then rev up in taller grass and weeds?  Also, does anyone's string trimmer rev up and get more powerful when you bump the head?  The line is long enough, but bumping it always seems to make it run better for a while.  I called customer service and they said that shouldn't happen and that I should return it, but I love the trimmer and am reluctant to return it. 
It does seem to lose power intermittently, but more in short grass than tall grass even though the throttle is fully depressed.   
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Posted 2 years ago

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szwoopp, Champion

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MIke you beat me to the post.  The string length and grass height /thickness will change the sound dramatically.  This could easily be mistaken for the motor rpm.
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Anthony Weaver

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I noticed the power change. In my experience the sound change was due to the string length. Power slows as the string get shorter. It's like the machine is asking you to bump and get more string. It works much better and with way more power when the string is long.