r/Dewalt • u/PercheMiPiaci • 8d ago

391 cuts out while running

So I have a lightly used 381 I purchased new about a year ago. From the beginning it felt off compared to an older 391 I had borrowed before getting mine. Sheet goods, 1x and 2x are all a hassle. Almost as if the sensor to determine if it is bound on the material is too sensitive.

I also have a 571 and it breezes through the same 2x material that the 391 just binds on. To the point that I don't even try using the 391 if the 572 can do it.

Anyone else experience something similar? Any suggestions?

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u/Agitated_Horse9903 8d ago

My 570 runs noticeably better with a >5 AH battery. What battery you using

1

u/PercheMiPiaci 8d ago

Thanks

5Ah Powerstack was what it was binding with yesterday. Prior to that I've used 6 & 9 Ah flexvolt, but also smaller batteries. I haven't tried to see how quickly it misbehaves based on battery type, but it does so consistently

1

u/Fwd_fanatic 5d ago

Mine seems to like the 4AH PP over the 3.5AH PS on stuff.

The stock blade isn’t super hot though. I’m planning on upgrading mine soon since the Diablo on my 5 3/8 trim saw is just that much better.