You buy this boat to fish shallows, back bays and stump country — environments where quick hole shot is paramount. The less weight, the better, especially on the transom. Despite the 13 percent increase in displacement, Yamaha says its new F90B weighs 13 pounds less than the F90A it replaces, 366 pounds reduced to 353 pounds for a 20-inch model. That’s nice work shedding weight, but the Yamaha is still not the lightest 90 on the market; the 1.3-liter Evinrude E-Tec 90 two-stroke weighs just 320 pounds, and the 1.5-liter Suzuki DF90 is the lightest four-stroke at 341 pounds. Both of those motors give up displacement to the Yamaha. That’s the trade-off. Testing with a light load and a Talon SS prop, the Xpress popped on plane in less than 4 seconds with no bow rise, demonstrating that displacement and torque are also part of the hole-shot formula.