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Old 04-12-2004, 07:05 PM
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bugspit bugspit is offline
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Measuring spark?

Is there a way to measure the coil output with an OHM meter?

I'm down to my wits end, Homelite weed eater, rebuilt carb, replaced fuel tank last year, ran great for about 4 months.

What it's doing now is it's hard to start, runs at idle only with choke on, give a little gas and dies.
Been through the carb and fuel lines thinking it's starving but it appears OK. New fuel lines and filter included with tank.
The spark looks weak to me.

Being a Homelite, is it time to upgrade?
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Old 04-12-2004, 07:25 PM
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BW4486 BW4486 is offline
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Yes its time to graduate to a real string trimmer
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Old 04-13-2004, 09:04 AM
sdwally sdwally is offline
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You can use a ohm meter to test resistance through the coil and compare with the reading from a new coil. However to test output of the coil you need a kV testor. There are costly testors that Snap-On sells that work well or you can buy one that fairly cheap that take the place of the spark plug. These you can see the spark jump from terminal to terminal and usually have a screw to adjust the gap. The wider the gap the higher the kV rating. Most small engines are under 5kV.
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Old 04-13-2004, 09:53 AM
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J.Gordon J.Gordon is offline
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It would be cheaper to buy a new coil than to buy a high-voltage tester. And when your coil gets warmer the resistance will change if not short to ground if it's bad thats when a lot of problems happen.
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Old 04-14-2004, 08:44 AM
barnard barnard is offline
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Its not electrical it s fuel or throttle position would not affectit. Pitch it and get a good trimmer.
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  #6  
Old 04-14-2004, 09:40 AM
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bugspit bugspit is offline
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Quote:
Originally posted by barnard
Its not electrical it s fuel or throttle position would not affectit. Pitch it and get a good trimmer.

Replaced it with a Kawa KTR27A, gonna save it in case a find another at a yard sale and use it for parts. The coil was worth more than I gave for it. Might be a backup or yard ornament one day.
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1/8/09 "Only government can provide the short-term boost necessary to lift us from a recession this deep and severe."
1/28/09 "In the end, the answer to our economic troubles rests less in my hands or in the hands of our legislators than it does with America's workers and the businesses that employ them."
BHO
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Old 04-14-2004, 05:24 PM
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ProMo ProMo is offline
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have you checked the exhaust port?
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  #8  
Old 04-14-2004, 07:00 PM
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bugspit bugspit is offline
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Yeap, the screen was about clogged up, cleaned it and tried it, removed it and tried, no difference.

Acts like it's starving for fuel but I've cleaned, blew out, replaced fuel, I've done this twice.
The spark is weak, I'm wondering if when gas is given the spark is not enough to ignite?
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1/8/09 "Only government can provide the short-term boost necessary to lift us from a recession this deep and severe."
1/28/09 "In the end, the answer to our economic troubles rests less in my hands or in the hands of our legislators than it does with America's workers and the businesses that employ them."
BHO
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  #9  
Old 04-14-2004, 09:37 PM
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Joe B J Joe B J is offline
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Check the exaust port, not just the screen. Remove the muffler and make sure the port opening is clear.
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  #10  
Old 04-14-2004, 09:41 PM
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bugspit bugspit is offline
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Damn near polished and ported it. It breathes out just fine.
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1/8/09 "Only government can provide the short-term boost necessary to lift us from a recession this deep and severe."
1/28/09 "In the end, the answer to our economic troubles rests less in my hands or in the hands of our legislators than it does with America's workers and the businesses that employ them."
BHO
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