Simplicity 2620 not charging

[Joe90]

Hey guys, just found this forum as I am struggling. My Simplicity 2620 ride on lawn mower has a Briggs and Stratton 20hp engine. I have checked the alternator output is ok (18 -20 volts ac). Renewed the regulator (as Briggs and Stratton test strategy showed it needed replacing) but the battery still does not charge?.. battery is ok and holds charge, if I install an ammeter between the battery and negative lead (after starting it) it shows no charge and with headlights on a good discharge. HELP 🤷‍♂️

[Mick]

Hi Joe90, and welcome to TGMF.

Have you tried connecting your amp meter directly between regulator output and the battery? I can only think if the stator and regulator are all testing out ok then you have a wiring fault of some kind.