Motor Specifications:     P-20 HP     P-15 HP     P-9.9 HP     P-8 HP     T-9.9 HP     T-8 HP      Motor Inventory:     New Motors     Used Motors     Non Current         Official Sites:     Yamaha Outboards        .............................................. Yamaha Motors High Thrust 8 HP Overview:                  Overview | Specifications | Features When you need an extra measure of muscle, Yamaha high Thrust 4-strokes give you up to twice the thrust of a comparable 2-stroke. General Spec's: High Thrust 8 HP 4-Stroke Prop Shaft Horsepower: 8 Shaft Length: 20" / 25" Come visit our showroom and see for yourself why Northshore Marine is one of Texas' finest southwest dealer.