Keith, The wiring diagram for the 1476 IS on Sonny's site, at least up to the coil, and after the coil is only the breaker points and condensor. The page is linked below. (Go to page 11.) Somewhere on that site is some Wisconsin-specific stuff that will show the engine-mounted ignition stuff. That is a battery ignition tractor (I have one). If you're only getting a single spark when turning the key on or off, and not while cranking, it sounds like the points are never opening, or there is a short between the coil's (-) side and the points. A shorted condensor will cause this, too. Check this with a 12 Volt test light... key on, there should be power at the coil's (+) terminal. Then, connect the test light to the coil's (-) terminal, and crank the engine. The test light should blink off and on as the breaker points open and close. If the test light is always "off", you do, indeed have points not opening, or a short in that circuit. Post back with what you find!
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