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The process is fairly simple. Hint - The bolt holding the pully to the front of the crankshaft is at TDC. # 1 piston coming up on the compression stroke with the F (fire) mark centered in the inspection opening (bottom of the bell housing). Remove the distributor cap from the magneto. Turn the rotor backwards until it's at the 9:00 o'clock position (#1 cylinder in firing order). Hold the rotor in this position, install the magneto into the drive coupling. Tighten down the magneto. Double check. Rotate the engine one full revolution until the magneto snaps. The F mark should be 3 1/8 inches (at TDC) past the inspection hole center. Your flywheel probably doesn't have a TDC mark unless someone painted it on the flywheel. It's probably better to have the F mark a bit further than 3 1/8 inches past the inspection opening during the initial timing - less chance of starter crank kick back when trying to start the engine. Reinstall the distributor cap and wires. Start engine. Set the running timing with a timing light. F centered in the opening at just off idle speed. Use a seperate 12 volt battery as the timing light power source. Shelia. It may take a couple of tries to get the magneto set if this is your first time installing one. Good luck. AND DON'T WRAP YOUR THUMBS AROUND THE STARTER CRANK. THUMBS ALONG SIDE THE FINGERS.
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