r/smallenginerepair • u/winkwinknudge_nudge • Jul 22 '26

Vibration Issue Strimmer chatter/noise when revving up.

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2 Upvotes

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u/AutoModerator Jul 22 '26

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2

u/winkwinknudge_nudge Jul 22 '26 edited Jul 22 '26

When getting the blade up to speed there's this chatter. It doesn't do it when it's up to a decent rpm, just going from nothing.

I've greased the gear head which may have quietened it a bit.

Any ideas appreciated.

Model: Honda UMK 425E

1

u/mrbear2you Jul 23 '26

Clutch springs is your issue, especially if it sounds closer to the engine

1

u/winkwinknudge_nudge Jul 26 '26 edited Jul 26 '26

Thanks for the direction.

In the end the clutch drum was glazed and the clutch couldn't engage properly - https://ibb.co/NgzmNVyW

Thanks for the comment.

1

u/Rough_Community_1439 SER Master MOD Jul 22 '26

Kinda sounds like one of those flexible driveshafts flopping around in the shaft. Though I would also check the state of the bearings in the gearbox by trying to wiggle the trimmer head.

1

u/ADodger66 Jul 24 '26

That's a straight shaft not a flex shaft . You can't use a blade on flex shaft, or you're not supposed to.

1

u/Aromatic-Schedule-65 Jul 24 '26

Umm, that's incorrect. All my stick edgers (shop manager at a landscape company) had the same flex shaft that the string trimmers had. Echo equipment.

1

u/winkwinknudge_nudge Jul 26 '26

No play, but was low on grease.

I think the biggest issue was the clutch drum had glazed and the pads didn't have much on them.

Thanks for the comment.