If you don"t have spark when it quits then you"ll have to find the problem in the primary ignition circuit(battery to key to coil to distributor to ground). Check the points for burning and replace the condensor.
Is it converted to 12V from 6V? If so, what type of coil do you have? There are "real" 12V coils that have ~3.2 ohms of primary resistance and there are~ 1.6 ohm coils that need a ballast resistor in series if used in a 12V ignition system. If a 1.6 ohm coil is used without a ballast resistor, the high current will cause the coil to overheat and short internally. When it cools off, it will run but overheat and short again. You could also have a high reisitance in the keyswitch that cause it to get hot, increase it"s resistance and cause a weak spark. You may have a loose wire somewhere that"s grounding out the igniton causing it to die. Systematically check these things out and you should find the problem.
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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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