RedactedNarrative: V1 was traveling southbound on the icw just north of marker 68 when it caught fire. V1 operator advised that he was cruising under 25mph when he observed smoke coming from the engine compartment. He opened the engine cover and observed flames and dark smoke. The equiped halon extinguishing system did put fire out. Operator docked vessel and disembarked the vessel with his occupants, no injuries sustained. Broward fire dept. Responded and put fire out, vessel was towed to operators home via towboat u.s. heavy fire damage was noted in the engine compartment and below deck areas. Fire believe to have started from exhaust manifold.