Rebuilding Ignition Coil

Location
14519
I'm attempting to rebuild a yamaha ignition coil with msd plug wires. I already cleaned the old wire out, now I just need to epoxy and stab the new wire on the spike, but the new wire just doesn't seem to want to go. Are there any tricks to it or do I just need to eat my wheaties and push harder?
 

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OCD Solutions

Original, Clean and Dependable Solutions
Location
Rentz, GA
I was gonna say, 8.5mm into a 7mm hole is usually an impossible task but I see you removed the entire side of the coil rather than drilling it out.
In that case, you may as well toss it in the bin unless you can find an epoxy rated at 25,000 volts.

If I so much as crack the side while drilling out the housing, it goes in the trash. Even the slightest crack increases the chance for trace arcing and a failed unit.

For future units, you will have to drill the wire out and enlarge the hole to at least 8mm to use the MSD wires.
 
Location
14519
The picture was just for attention, I have a bunch of old coils laying around so cut one to see how big the spike was. The hole had been drilled to the correct size for the msd wires.
 

OCD Solutions

Original, Clean and Dependable Solutions
Location
Rentz, GA
Then push harder with a bit of a twist at the same time. I dry fit all my wires first and mark for proper depth to ensure full engagement.
I don't use MSD wires but some of the other brands need the hole for the spike made with a different tool prior to insertion.
The cut up one would be a good tool for that.
 
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