FYI
I had a WICO XH113 Magneto in pretty bad shape on my OC-3. The XH1113 is the magneto used on later HGs and OC-3s.
I can't hand crank the engine because of the hydraulic pump on the front of the crankshaft so will always need a battery and electric start. I like to keep things simple so I traded the WICO XH1113 for a WICO XB4000 distributor (fewer moving parts). THe XB4000 looks like the XH1113 except for a door which houses a resistor and a lug on the bottom of door to connect the battery. My XB4000 actually has two resistors in series since I am running with a 12V battery. The coupling to the XB4000 has a "C" stamped on it. There are actually 4 couplings that can be used with the XB4000 depending on which engine it is used on but the Hercules takes the "C" coupling.
The engine runs great with the XB4000 and the timing came in with the timing light just as it did with the XH1113.
Without the impulse mechanism and armature (rotor), the XB4000 is much simpler compared to the XH1113.
Thumbs Up!
Does it have a centrifugal advance Glen?
Blake, yes it has a centrifugal advance. I believe it is exactly like the XH line of magnetos except it does not have an armature and impulse mechanism. It timed great with my timing light and I could see the advance working as I moved off idle to maximum advance with the maximum advance set for viewing on the flywheel through the hole to the rear of the carb. exactly as with the XH.