Assessment in action chapter 17

Optix meaning

• Jan 10, 2013 · For interested Cummins motorhead readers. I found an old post to a question I asked on boatdiesel forum a few years back when the Cummins QSB 5.9 appeared on the market replacing the Cummins 6BTA 5.9. The mechanical 6BTA 5.9s were replaced by the "new at the time" QSB 5.9s that are EPA Tier II engines.
• 6BT / 6BTA 5.9 Mechanical Engines 6CTA 8.3 Mechanical Engines QSB 5.9 Electronic Engines QSB 6.7 Electronic Engines QSC 8.3 Electronic Engines QSL 9