Jet propelled watercraft stabilizing system

A jet propelled watercraft having a front, a rear, a first side, a second side, a waterline and a stabilizing system, the stabilizing system comprising:

• a first fin and a second fin, said first fin and said second fin each having a front, a rear, a tip and a base;
• a first trim block and a second trim block, said first trim block and second trim block each having a front, a rear, a top, and a bottom, said front being more narrow than said rear and said bottom being wider than said top, the shape of each trim block being defined by the more narrow front and the wider bottom;
• said first trim block being mounted on said first side of said watercraft toward the rear of said watercraft at about the waterline of said watercraft, said second trim block being mounted on said second side of said watercraft toward the rear of said watercraft at about the waterline of said watercraft;
• said first trim block mounting said first fin on said first side of said watercraft toward the rear of said watercraft at about the waterline of said watercraft, said second trim block mounting said second fin on said second side of said watercraft toward the rear of said watercraft at about the waterline of said watercraft, said first trim block and said second trim block mounting said first fin on said first side of said watercraft and said second fin on said second side of said watercraft such that the shape of said first trim block and the shape of said second trim block provide said first fin and said second fin with a correct toe-in and a correct camber-out, said correct toe-in having said front of said first fin and said front of said second fin closer to each other than said rear of said first fin and said rear of said second fin, and the correct camber-out having said tip of said first fin and said tip of said second fin further apart from each other than said base of said first fin and said base of said second fin;
• and wherein said first fin and said second fin provide a centering force for said watercraft when driving said watercraft at planing speeds so as to keep said watercraft steady, predictable, precise in handling and with enhanced turning ability.