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Author Topic: MS290 Mystery Wire  (Read 636 times)

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Offline Jyounge

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MS290 Mystery Wire
« on: January 10, 2016, 11:46:07 am »
We rebuilt our MS290 chainsaw and, of course, have an extra wire. Any idea what it is and where it goes?

Thanks guys!

Jenn
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Offline RoyM

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Re: MS290 Mystery Wire
« Reply #1 on: January 10, 2016, 11:54:52 am »
It looks like the ground wire for the switch. Turn the switch off and check for spark, you shouldn't have one.
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Offline jmester

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Re: MS290 Mystery Wire
« Reply #2 on: January 10, 2016, 02:16:37 pm »
Should go from the ignition module mount screw the ground screw on the cylinder.
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Offline jmester

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Re: MS290 Mystery Wire
« Reply #3 on: January 10, 2016, 02:25:19 pm »
They run 2 ground wires from the module screw to the cylinder. One wire has 2 ring terminals. The other has 2 ring terminals and 1 spade terminal to the contact spring in the lower left corner of the carb box.
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Offline Jyounge

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Re: MS290 Mystery Wire
« Reply #4 on: January 10, 2016, 07:18:32 pm »
Thanks guys!
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