The Phantoms netted their first goal just 3:36 in courtesy of Zach Morin, then doubled their lead with 5:39 left in the period as Mikey Burchill found the top left corner from the slot.
Ryan Botterill added another on the doorstep to give Youngstown a 3-0 lead heading into the second.
Richard Gallant (Concord, Mass.) nearly got the U.S. on the board while on the power play to start the second and Jacob Kvasnicka (Plymouth, Minn.) was quick on the rebound, but Youngstown netminder Owen Bartoszkiewicz was equal to the task.
The Phantoms added a fourth 3:55 into the second as a streaking Hunter Ramos buried a one-timer right in front, then tacked on five more before the period came to a close.
Three more Phantoms goals in the final frame brought the final tally to 12-0.
The U17s are back in action next weekend at the Elite League Showcase in New Hope, Minnesota. Team USA will square off with the Elite League All Star Team for a pair of games on Saturday (Oct. 7) and Sunday (Oct. 8).