Thanks grumpy.
no nothing like this. But my mower is Evolution 2000 MKII with 15.5HP B&S.(originally B&S 16HP)

here is my configuration. just with harness 5 and 6 messed up by previous owner.
[Linked Image]


I successfully connect DC output directly to Key switch so now its charging at least and also I connected the Hour meter to key switch to.
So the clock tick now as soon as i turn ignition on. i don't really worry so much as i don't leave contact on if I'm not mowing. i may Add a Diode later on so the hour meter will only tick if engine is on.
Cheers.