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Bosch JIg Saw 1590EVS Problem

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My Bosch jig saw, model 1590EVS, does not maintain speed when I engage the trigger lock.  It slows down and then speeds up and continues this pattern.  I have contacted Bosch to inquire as to which part(s) should be replaced.  Bosch Customer Service will only tell me that I should have it serviced at an authorized service shop.  I have found sites that sell replacement parts and if possible I would like to do the repair myself.     

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Funny as I came here to the forum for the same issue with the same jig saw. I haven't contacted Bosch as I figured they'd tell me what they told you.

 

I'm very bummed as I haven't used this saw hard nor have I used it a lot. And I like it.

 

Did you find an answer to your question? Or does anyone reading this have any idea what might be wrong?

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Speed going up and down is most of the time the electronics/speed controller.

 

Noone can tell you by phone what is broken or not.  A repair guy needs to see your tool, see it's behaviour and check for other things that might have broken/been affected.

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I have the 1587 and that one has the speed pot built into the trigger. Does the 1590 have a separate speed pot? If so, have you cleaned the inside of the saw out yet with a few shots of air? You can also try some contact cleaner on the pot. I've found blowing out my saws and sanders has done wonders for some performance issues. Contact cleaner has done wonders for hte pots on my guitar amps as well.

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