Friday, May 24, 2019

Red: Red Herring #3 (Ignition Coil)

Had planned a quick lunchtime ride but came down to find she wouldn't start.

Wasn't even hearing her cough so it really felt like there was no spark.

Sure enough, I popped the plug and tested it and wasn't seeing anything at all on the kick.

My brain immediately jumped to a bad coil, which though it wasn't splitting the crankcase, still meant an epic job to drop the motor.

But having been through multiple red herring scares already, I figured I'd start with the simplest and work my way toward the epic.

Swapped out the plug for a brand new one and still no joy.

Then checked static timing and again found it was dead on.  Also did some testing with continuity, though I wasn't 100% sure of what I was checking for.  But I did get continuity between the points wire and the coil wire that ran inside the battery box, which was good because at least the wires had not become detached.

I popped off the plug cap because I'd wanted to check continuity (which it doesn't have, not sure why).  In doing so, I noticed offhand that the wires in the HT cable didn't seem well placed and there were only a couple that seemed to be making good contact with the cap.

So I re-arranged them to create a little more contact and when I put the plug back on and tested... big fat blue sparks.

So I can only guess that it was already a loose connection and when I pulled the plug the other day to check piston, I'd broken it fully.

That was a close one...

Few laps around the block for Shakedown #3 with no drama.




No comments:

Post a Comment