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Ignition module hazard potential

Discussion in 'Chainsaw' started by Bobcat, Oct 25, 2007.

  1. Bobcat

    Bobcat ArboristSite Member

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    I was checking something in my Stihl 440 server manual today regarding the ignition module . It starts this topic with a warning of the high voltages that can cause "serious or even fatal accidents". Like most folks on this site, I know not to hold on to the spark plug while checking for spark. Maybe 20,000 volts !!!

    But I am not sure of what else "not to do". If I need to remove the IM, I always pull the spark plug wire first. The IM is not a capacitor so it retains no energy/charge. Agree ? What are the rules when working with this part ?

    Time permitting next week, I want to take two junk saws apart and build one working saw, and live to brag about it.
     
  2. Lakeside53

    Lakeside53 Stihl Wrenching

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    You don't need to do anything.. other than not hold the plug wire while you crank.
     
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  3. Bobcat

    Bobcat ArboristSite Member

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    They made it sound so serious that I was afraid of the "unknowns". I did not want to be known as "sparky", in the past tense form.

    More good advice from Andy.
    thanks
     
  4. adkranger

    adkranger Addicted to ArboristSite

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    There is so much liability limiting language in manuals these days it's amazing that anyone attempts to do anything................
     
  5. Bobcat

    Bobcat ArboristSite Member

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    Andy:

    Is there any shock potential directly from the ignition module, or is it only when connected to the spark plug ?

    Or, put it this way, if the spark plug wire is connected, and you manual spin the fly wheel, is there a shock potential it your hand is on/near the IM ?
     
  6. Lakeside53

    Lakeside53 Stihl Wrenching

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    nope.. unless there's a break in the wire.
     
  7. Bobcat

    Bobcat ArboristSite Member

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    AD:
    I agree and was not sure of how much of this wording was "PYA". Good point, but for my own safety, I wanted to post on A/S.
     
  8. andrethegiant70

    andrethegiant70 Addicted to ArboristSite

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    Jeeze, I've sorta come to enjoy hangin' on to the spark plug while checking the electronics! You guys sure know how to take the fun out things....
     
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  9. RaisedByWolves

    RaisedByWolves Addicted to ArboristSite

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    Better than coffee sometimes.




    Did this caution come before or after the one telling you not to hold the chain while running the saw?



    .
     
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  10. Bobcat

    Bobcat ArboristSite Member

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    RBW: Ditch that coffee and try a can of "full throttle". It will calm you down so you can handle these Chainsaw-101 type questions.
     
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  11. RaisedByWolves

    RaisedByWolves Addicted to ArboristSite

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    LOL!!!


    Bobcat, I returned your PM, sorry for any misunderstanding.



    :cheers:
     
  12. Lakeside53

    Lakeside53 Stihl Wrenching

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    :clap: :clap: :clap: :clap: :clap: :clap: :clap: :clap:
     
  13. RaisedByWolves

    RaisedByWolves Addicted to ArboristSite

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    What the hell is that all about, you got the clap?




    .
     
  14. Wortown Mick

    Wortown Mick Banned

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    Its much, MUCH more fun with a running motor.
    :monkey: :givebeer:
     
  15. Lakeside53

    Lakeside53 Stihl Wrenching

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    Hmmmm. let me check....

    drip drip..

    yep.. must have got it from yooooooo!:clap: :clap: :clap: :clap: :clap: :clap: :clap:


    Another thread down the tubes... ;)
     
    Last edited: Oct 26, 2007

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