[cooperino]

Originally Posted by Tom Dowling

My 682 starts sputtering and dies after about 20 minutes running, the coil gets too hot to hold on to. Once it cools down it will start up and repeat the cycle. I know with my old farmall tractors those symptoms mean a bad coil. Is that true with these dual output coils?
How does the coil know which spark plug to send the spark to or does it do both plugs each time? Just wondering and thanks for any input.

I would say the second this happens when it starts to sputter ohm it out. It may not go to zero ohms when it happens. You could ohm it out cold when it's running ok. Then compare it to when it acts up and gets hot. The manual may have the spec in it but I'm not sure

Edit. You need to check both primary and secondary resistance. I would think secondary should be up around 10,000 or so and primary in the 3-5 range