Are you sure the impulse coupling is not hanging up a little? The reason the spark advances at higher speeds is that as the engine RPM increases the centrifugal force of the impulse mechanisms moves outward and keeps the impulse from working so it then operates the points without the delay caused by the impulse mechanism.
I am having a little trouble visualizing your connections
Did you drill the center of the cap so that the coil secondary would plug into the front?
What condenser did you use? The condenser is sized to control the fly back from the ignition coil, you should use the condenser specified for the coil you are using not the original magneto condenser.
Look at the points, any change in color or pitting?
Any evident of pitting or transfer of metal from movable point to stationary point or vise-versa?
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Today's Featured Article - Hydraulics - Cylinder Anatomy - by Curtis von Fange. Let’s make one more addition to our series on hydraulics. I’ve noticed a few questions in the comment section that could pertain to hydraulic cylinders so I thought we could take a short look at this real workhorse of the circuit. Cylinders are the reason for the hydraulic circuit. They take the fluid power delivered from the pump and magically change it into mechanical power. There are many types of cylinders that one might run across on a farm scenario. Each one could take a chapter in
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