Rotate the mag opposite the direction of normal rotation until the points hold the paper. Otherwise use a piece of paper placed between the points. If you have a timing light or buzzer use it at this time.
#MAGNETO TIMING LIGHT INSTALL#
Once you have the mag against the accessory case, it can move while you install the large washers, star washers and nuts finger loose. This is not a very good idea as it limits your ability to correctly time the mag to the engine. A gear tooth could engage at one end of the slot. The slots which go over the mounting studs on the crankcase should be somewhat in the center. Otherwise the timing will be off by one gear tooth. You need to be certain that you do not let the rotor move and that the gear teeth engage smoothly. You may need to do this a few times until you get the feel of it. While holding the mag as stated, place it in the engine aligning the gear teeth. Make sure that the cam is magnetically holding the rotor steady. If you feel the rotor move at all, start over. This will assure that you can feel if the mag rotor moves while you are installing the mag. Hold the magneto with your left hand with two fingers on the cam which moves the points.
The white timing mark should still be visible but does not need to be centered as the points are controlling. The points will be open and the magnetism will be holding the rotor steady. While looking at points, slightly rotate the mag gear in both directions feeling the magnetism. Rotate mag until white mark on rotor gear shows in cap hole. Remove round screw in cap and point cover plate from mag. OR 25 BTC on forward side of ring gear with dimple on starter housing.
25 BTC on aft side of ring gear to split in crankcase halves. Rotate prop until air pressure pushes thumb off plug hole. Place thumb on #1 cylinder top plug hole. All spark plug leads removed from all plugs.
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