Thank you for the comforting words
Makes me feel a little less stupid, but still quite.

I’ve changed the head twice during the years, so I do know about the over heating issues. It has a #20 now, that I hope will last. I have a #22 on a spare motor. I didn’ see it over 105C (red mark is 128, normal is 82, and the fan start at 102. Water boils at 100).

Long story short: rerouted the belt, now it charges very well. Maintains 14,4 at idle with lights on and fan at 2. At 1000 rpm it is above 14V with all consumers on.

I don’t know if I shuld cry or laugh. A bit of both I guess.