If you are using any lightweight starter on a TCM TSIO360-MB engine in a Mooney with a 14v electrical system - BEWARE. In my Mooney 262 the lightweight starter caused the starter T-Drive gear and shaft to fracture in flight with a resultant simultaneous vacuum and low voltage warning. Fortunately, my airplane is equipped with a second alternator and electric vacuum backups. The failure stopped the T-drive from working properly and I had a partial loss of power due to the turbo filling with oil.
My IA did some research and it turns out that TCM does not recommend any version of a lightweight starter on this engine in a 14v Mooney (28V system is OK). The only starter safe to use is the old version PN: 646238-R.
I think that the only models with a 14v system running the MB engine are the converted 231's.
It's always something,
Jeff