The new coil. Take the wires off the terminals, check across them with an ohm meter.
If you get around 3 ohms, that coil is designed to run on a 12v system without a resistor.
If you get 1,5 ohms, that coil needs a 1.5 ohm resistor in series with the + terminal.
Regardless what the coil may say on the can, best to check it. If it needs a resistor, it will overheat the coil and burn the points. If it doesn't need a resistor, and there is one in the circuit, you will have very weak spark.
Another thing to check is side play in the distributor shaft. If any play, the points will not stay set, and can change with varying RPM and temperature. Once points are run out of adjustment, that can be arced and will not make good connection. The quality of today's points is bad. Might consider a Pertronix conversion.
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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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