Stilh Saw won't shut off - need help

Discussion in 'Mechanic and Repair' started by bob, Feb 17, 2012.

  1. bob

    bob LawnSite Platinum Member
    from DE
    Messages: 4,260

    I'm fixing a Stihl TS420 chop saw. It won't shut off with the switch. I did a
    continuity test. See photo. When the saw is in the run position, I get no current to the meter . When the saw is in the stop position, I get current. Not sure what to. I don't what to keep choking it out to shut it down.

    420 004.jpg
  2. piston slapper

    piston slapper LawnSite Platinum Member
    Messages: 4,334

    The kill cicuit in the coil isn't working. Replace the coil.
    Posted via Mobile Device
  3. StihlMechanic

    StihlMechanic LawnSite Bronze Member
    Messages: 1,133

    as long as youre sure the switch has continuity when in the off position (to ground out the coil and kill fire) then the problem lies with in the coil. This is pretty uncommon but have seen this with the TS chopsaws more so than other stihl handhelds. Make certain before buying a coil, as you would expect, they aren't cheap.

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