American Engineers Tore Down a Japanese Boat Engine — What They Found Inside

American mechanics pulled four engines apart to see what the badge on the cowling never tells you. I go bolt by bolt through the Honda BF200D, BF225D and BF250D shift linkage and cooling system, the Evinrude E-TEC G2 gearcase joint, and a Yamaha aluminum coating fight that landed in federal court. I show where each maker's own paperwork names the exact part, the exact build window, and what happens on the water when it fails.