Mercury 40HP SeaPro ELPTBT 2020 Mercury Marine® SeaPro 40 Engineered for Commercial Duty Season after season, these durable, easy-to-maintain SeaPro commercial motors deliver reliable starts and improved fuel efficiency. Calibrated to reach maximum torque at lower rpms, they provide more power with less stress on the motor. Get on plane faster – and stay there longer at lower speeds. ENGINE DETAILS A compact, single-overhead-cam design and long piston stroke deliver more low-end torque for stout power, even when pushing a heavy load. For commercial fishing vessels, commercial workboats and law-enforcement boats.