I am a bit baffled by the timing on my Tecumseh Kirby. It has a Wico ignition system.
I have set the timing according to the manual, with the cylinder and valves all flush on the head at "rocker" position, then turned the crankshaft counter-clockwise a smidgen to gauge the correct gap on the cylinder head. Then I have reset the magneto coil position so that the points are just at the brink of opening when the cylinder is at this point. This is exactly the way the manual specifies.
But when I turn the engine clockwise after doing all of this, the points become fully open at the point where the engine is supposed to fire. It all looks backwards to me, but I am use to working with Bosch ignition systems which fire when the points are in the closed position.
Do these ones fire the other way around?
I can only assume they must, otherwise "Houston, we have a problem!"
Looks like this one:
