Jet boats were once mostly hairpin-­happy thrill rides, with the reflexes of a slot-car. Today, they’ve matured into hot-selling family models, viable alternatives to craft propelled by propellers.

V-drive inboards do a great job, so why bother with water-jet power in this specialized category? We didn’t honor Kyma for simply being different. The 6.2L 575 Indmar jet gives this boat shallower ...