Legacy variant · S6A3
S6A3-MPTA
This exact configuration isn't sold new in Australia — Australian rules require new marine engines to meet IMO Tier II emissions requirements, and the S6A3-MPTA doesn't carry a Tier II rating. If you're running one, OPS still stocks genuine parts for it and can supply the current Australian Tier II S6A3 equivalent below.
S6A3-MPTA — as supplied
Auxiliary Genset400–460 kW1500–1800 rpm
Australian Tier II equivalent
The S6A3 is still in our current range. The Tier II variants we sell new in Australia today are:
- S6A3-T2MPTK
- S6A3-T2MPTK3
- S6A3-T2MPTAW
Just need parts for the S6A3-MPTA itself? Start a parts enquiry →

