Cat 3516 engines set the standard in the drilling industry. For many years the 3500 has been the preferred choice by drillers due to their high performance, durability, and reliability in the oilfield.The ideal application for the 3512 engine is mechanical drive for land drilling rigs.3516 engines, with ratings: 1230 bkW (1649 bhp) @ 1200 rpm. Not emissions certified, available for non-regulated areas.