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#938785 - 05/14/18 07:29 PM Checking for spark
twoshoes Offline
Carpal Tunnel

Registered: 09/26/03
Posts: 4088
Loc: PA
Can't get my line trimmer to start. Pulled the plug and it is wet from gas that is new. Put the plug back into the boot and pulled the cord. Can't see any spark (maybe not dark enough) but could feel a tingling sensation when holding by the porcelain. Does that mean it it is sparking?
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#938786 - 05/14/18 07:36 PM Re: Checking for spark [Re: twoshoes]
bilvihur Offline
Carpal Tunnel

Registered: 02/04/05
Posts: 3327
Loc: Hudson Valley, New York
It's a good start, but you actually have to SEE a spark across the electrodes. Try grounding the plug (in the boot) against the block when you pull the cord.
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#938791 - 05/14/18 10:47 PM Re: Checking for spark [Re: bilvihur]
twoshoes Offline
Carpal Tunnel

Registered: 09/26/03
Posts: 4088
Loc: PA
Thanks for the response. I was wondering if it was necessary to ground the plug and you answered my question. I will try that tomorrow but will need my wife to help me. I'll ground the plug and watch while she pulls the rope and if we are in a dark enough spot hopefully see a spark! Will update after my test.
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#938815 - 05/15/18 01:32 PM Re: Checking for spark [Re: twoshoes]
notnew2diy Offline
Carpal Tunnel

Registered: 08/18/06
Posts: 4797
Loc: harvard, il.
If the plug got wet w/gas, burn off the residuals w/a propane torch or spray w/brake cleaner.

A cereal box, rounded over like a tunnel,
can help provide the dark you need to see the spark.

HTH...good luck...notnew...
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#938821 - 05/15/18 04:34 PM Re: Checking for spark [Re: notnew2diy]
twoshoes Offline
Carpal Tunnel

Registered: 09/26/03
Posts: 4088
Loc: PA
Thanks for the additional tip. I will clean the plug up good. Didn't get a chance to work on it today, hopefully tomorrow!!!
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Tom




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#938825 - 05/15/18 05:51 PM Re: Checking for spark [Re: twoshoes]
jdevlin Offline
Carpal Tunnel

Registered: 09/09/02
Posts: 9741
Loc: Welland Ont. Canada
I have never had to clean a plug unless it was all carboned up. Once you pull it out the gas will not effect the spark.

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#938858 - 05/16/18 09:20 AM Re: Checking for spark [Re: jdevlin]
notnew2diy Offline
Carpal Tunnel

Registered: 08/18/06
Posts: 4797
Loc: harvard, il.
Originally Posted By jdevlin
I have never had to clean a plug unless it was all carboned up. Once you pull it out the gas will not effect the spark.


I have had more than a few times, the engine flooded (2 and 4 stroke), plug was saturated w/gas.
Clean plug as described, did nothing more, engine fired like nothing had happened.

YMMV....notnew...
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#938865 - 05/16/18 10:18 AM Re: Checking for spark [Re: twoshoes]
JasonB Offline
Sharp -Shooter
Carpal Tunnel

Registered: 04/27/04
Posts: 16774
Loc: Cape Spencer, New Brunswick, C...
Would likely have fired up if you'd simply opened teh choke and pulled a while too... A flooded 2 stroke is a terrible thing to start!

J
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#938910 - 05/16/18 06:32 PM Re: Checking for spark [Re: twoshoes]
twoshoes Offline
Carpal Tunnel

Registered: 09/26/03
Posts: 4088
Loc: PA
Success!! Cleaned up the plug and reinstalled it, added new gas, then pulled the cord twice and it started right up. Only then did I notice I never even used the choke. Thanks for all of the responses, great forum indeed.
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Tom




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