Power surge on 12" trimmer

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This conversation has been merged. Please reference the main conversation: 12" string trimmer doesn't seem running properly?

My 12" ego trimmer starts off with lots of power but then decreases about 1/2 power in a couple seconds and sometimes surges back and forth? Is there a way to fix this?
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Mitchell Schultz

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Posted 4 years ago

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Blue Angel, Champion

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That's a new one to me, Mitchell. The only thing that comes to mind would be to check the connection terminals on the tool for wear or corrosion?

Send Customer Service an email describing the problem, include your callback info, and they'll get in touch ASAP to troubleshoot the issue:

support@egopowerplus.com
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Mitchell Schultz

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The connections all look like new. I'll email them and see what they say.
Thanks for the response
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Blue Angel, Champion

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No problem. Let us know if you're able to figure it out.
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Jennifer VandeWater, Community Manager

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Hi Mitchell, do you have the semi-circular guard install on the trimmer?  Without the guard installed, the trimmer will behave exactly as you describe. It's a safety mechanism designed to protect the motor.  The guard serves as the cutoff for the string.   So if it's not installed, the motor goes into protect mode to ensure it's not working too hard with an undetermined amount of string.
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SCDC, Champion

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I knew this was a safety feature, but hey!  I just learned something new.
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Blue Angel, Champion

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Me too!

Jennifer, does the trimmer actually detect the presence of the guard, or does it assume the guard is missing if the ramp-up torque is too high (indicating longer than normal string)? I guess what I'm asking is, would the trimmer know the guard was missing if the string was not too long?
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On that note, does the 15" trimmer work the same way?
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SCDC, Champion

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My 15" doesn't have that metal guard. I assume that's what she is talking about??  But it doesn't detect or cut the line.  I remember a conversation that if the metal guard isn't in place, it was the issue.

I do know that if my line was too long on the 12", it would act goofy.  It detected it.  I haven't run across any of that on the 15"
(Edited)
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Mitchell Schultz

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That's my problem. I took the guard off to let me run 15" of string. Thanks for the information!
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SCDC, Champion

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That was a simple fix.  Yeah, the 12" knows.  It knows if you try to cheat and go 15".  :)
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Blue Angel, Champion

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Interesting... I wonder if the 15" trimmer would get smart to running longer string?

The initial reason behind my curiosity is the use of the trimmers in custom Ego powered projects, like Jacob's.

Maybe since the 12" is a single speed device it expects to ramp up to 100% with less than a predetermined amount of load? If that's the case the 15" variable speed model may not have such a start-up program...
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SCDC, Champion

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I never run my 15" at full speed, so I wouldn't know.  My guess is that it wouldn't ramp down.  Who knows *shrug*?
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Jacob

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Ahh so that is why my homemade pole saw dies down. Its protected by the controller.... this makes sense.
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SCDC, Champion

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That answers our question about your pole saw project.
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Jennifer VandeWater, Community Manager

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Hi everyone, yes, this will happen with the 15" string trimmer as well. The trimmers do not have a sensor to tell whether or not the guard is installed.  The motor is sensing the line length.  Since the guards act as line limiters, if they are missing, the motor will sense when the line is the improper length and go into safety mode.  Obviously, this isn't an exact science but we hope this will help explain some strange performances you may have seen from your trimmers in the past and/or future.
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SCDC, Champion

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That's some good information Jennifer, thank you.
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Blue Angel, Champion

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Agreed!!!

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