The S20 Cruise is a lot of boat for just under $29,000. Highly configurable, with many upgrades available, it’s a great platform fitted with Yamaha’s F70 four-stroke outboard. With a 13.5-inch-by-9-inch standard Yamaha aluminum three-blade prop, we hit 22 mph at 6,250 rpm. Our best cruise speed was at 15.5 mph and 4,500 rpm; at this gait, the little F70 drew only 2.9 gallons per hour, which calculates to a thrifty 5.3 miles per gallon. While 15 mph won’t win any speed contests, it’s plenty for family cruising and lighter watersports like tubing and kneeboarding. A 90 is the largest engine that can be bolted to the S20’s transom; in that case, the extra ponies would give more speed without reducing economy or range noticeably. Standard single-cable mechanical steering gives good control without excessive engine-torque steer.