As Scott states, and I agree yeah, leave it alone... BUT... if for some reason, you just want to know.........
Remove all spark plugs... Advance the throttle/timer-base under the flywheel all the way to hit the rubber cap stop, tying it there so it can't possibly move... Hook up your timing light to the top (#1) cylinder, aim it at the timing pointer and crank the engine over.
The reading should be exactly 4 degrees less than what the manual states. The 4 degrees difference being due to the solid state ignition which varies exactly 4 degrees between cranking speed and the engine's top rated rpm.
