Fluctuating power from power head

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  • Updated 6 months ago
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Used my power head with the edger and string trimmer for the second time today. Noticed last week--first time using it--that the motor would change in pitch while the trigger was held. Like if it's slowing down and revving back up. This weekend, did the same and didn't feel as powerful as it did first time using it. Is this normal?? Battery was charged 100% before both uses.
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Alex Sanchez

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Posted 7 months ago

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Lehigh Lawn Pros

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Hi Alex,
 I've put quite a few hours on my PowerHead with edger and line trimmer attachments the past two weeks using them commercially. I also notice the motor rev up and down a little at times, especially when edging. It seems to be self-adjusting to the changing load, it hasn't been a problem though.

 Also, when trimming, I find that it's rather difficult to hold the trigger at the same speed consistently because it has so much resistance (too much spring resistance?). I'm slowly getting used to it, but less resistance would certainly make for more consistent and less fatiguing operation.

 Otherwise, I'm quite pleased with the overall performance of the PowerHead so far, and I plan to totally replace my gas trimmers and edgers with them.

Regarding your unit not having as much power as the week before, perhaps the 1-2 (low-high) switch got switched inadvertently?

Bob
(Edited)
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bigfootcountry

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Bob,

I too think the spring on the trigger is to stiff and find myself occasionally switching from index to middle finger for a little relief.....and i was just thinking I was being a wuss. Have you looked at taking the handle apart and figuring a way to lighten the spring? I dont really care for the safety placement either.

Jeremy
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Lehigh Lawn Pros

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Hi Jeremy,
Yeah, I've toted the FS130 for years, and before that Shindaiwa T27s,
so my throttle finger should be strong enough, lol.
It's definitely hard to keep held down, and I've been switching fingers as well.

 I'm a little unique, in that I use a palm up grip with my right hand, and I trigger with my fourth finger (or alternatively the middle finger). You should try it, this technique supports the weight/vibration of the trimmer with primarily the bicep and puts much less stress and fatigue on the wrist and forearm.

 However, the safety was out of reach for me. I fixed that with a zip-tie, but a safety like is on the 15" trimmer would be better, and would work for left-handed users as well.

 I haven't yet tried to modify the spring tension, I'll let you know if I do.

Bob
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Jacob, Champion

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It's only a few screws to open the handle up and swap out that spring. Easy fix. I haven't done it but I would bet money that it would be a piece of cake.
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bigfootcountry

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Finally figured I'd take a look. Well not so simple.....Split the handle and the trigger pivots against a plunger/post that compresses into a control box. Small control box can be split and does expose a coil spring but there is a few small wires and soldered connections...not great light and with failure possible and no way to buy spare parts may pass on this one at least for now. If desired safety appears to be easily modified.

Your mileage may vary.

Jeremy
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Lehigh Lawn Pros

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Thanks Jeremy, for checking it out, and for posting your findings.

I seem to be getting a little more used to the spring resistance each day,
it doesn't bother me as much as it did at first. So I may be o.k. without modifying mine.

I've thought about taking the whole handle assembly from a basic 15" trimmer,
and installing it on the PowerHead, not sure though, if the wiring would match up,
or if it would function correctly. I always run in "speed 2" (high speed) so I don't need that switch. If it did work we could call it the 23" FrankenTrimmer  lol.

Bob
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Jacob, Champion

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Love it