The 10-tooth pinion replaced the original 9-tooth one on inertia drive Lucas starters. If yours has 10 teeth or you want to upgrade to the latest spec, this is the one to use. Ref: TLB111-10, TLB111, BAU2074.
See TLB111-9 for the earlier 9-tooth pinion.
10/5/2020 2:00:00 AM