For more than 40 years, McKinney Companies has served the Gulf petroleum and dry cargo industries from its headquarters on the Mississippi River and Intracoastal Waterway. The latest addition to the towing fleet is the shiny new Mac Andrew McKinney. To power the push boat, they turned to Laborde Products to supply an S12A2 Mitsubishi engine rated 940 hp at 1,940 rpm. "We wanted a Tier II diesel engine with hydraulic governor," said Andy McKinney, VP of operations. "We also preferred to avoid the hassle of complex computers and electronics, so we chose a low-maintenance all-mechanical model.