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Help! Need engine help for ignition troubleshooting on chipper-shredder
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<blockquote data-quote="NuclearNick" data-source="post: 7301906" data-attributes="member: 149469"><p>OK [USER=166664]@frank_[/USER] , I took some measurements using the engine frame as ground:</p><p></p><p>No resistance / connected to ground: spark plug threads, armature of ignition coil (laminated bars)</p><p>Infinite resistance: spark plug center electrode, spade terminal sticking up out of coil</p><p>Armature to plug wire cap - about 2K (this is open on my old coil)</p><p>Spade terminal to plug wire cap - about 250K (this is about 5K on my old coil)</p><p></p><p>I have no idea what all of that should mean to me, frankly (I'm not a very good electrician). But if my armature is connected to ground, and is only 2K to the plug wire cap, wouldn't any developed voltage just go to ground through a 2K resistor? In the old coil (which wasn't working) the armature and the plug wire cap were not connected at all. </p><p></p><p>I bought this thing from Amazon, but not from OEM. I wonder if it's possible that I got a bad coil. But I'm a little lost as to why neither my new nor old coil develops a spark.</p><p></p><p>For [USER=128211]@TRTermite[/USER] , no points, etc. Just a sealed ignition coil.</p></blockquote><p></p>
[QUOTE="NuclearNick, post: 7301906, member: 149469"] OK [USER=166664]@frank_[/USER] , I took some measurements using the engine frame as ground: No resistance / connected to ground: spark plug threads, armature of ignition coil (laminated bars) Infinite resistance: spark plug center electrode, spade terminal sticking up out of coil Armature to plug wire cap - about 2K (this is open on my old coil) Spade terminal to plug wire cap - about 250K (this is about 5K on my old coil) I have no idea what all of that should mean to me, frankly (I'm not a very good electrician). But if my armature is connected to ground, and is only 2K to the plug wire cap, wouldn't any developed voltage just go to ground through a 2K resistor? In the old coil (which wasn't working) the armature and the plug wire cap were not connected at all. I bought this thing from Amazon, but not from OEM. I wonder if it's possible that I got a bad coil. But I'm a little lost as to why neither my new nor old coil develops a spark. For [USER=128211]@TRTermite[/USER] , no points, etc. Just a sealed ignition coil. [/QUOTE]
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