1986 Four Winns Liberator 1986 Four Winns Liberator This 1986 Four Winns Liberator is 21ft long with a fiberglass hull. The inboard engine is a Mercruiser 302 V8 engine. The trailer is a 1986 Custom Bunk trailer., Class: Power, Category: Bowrider, Year: 1986, Make: Four Winns, Length: 22'