How Long Does LEGO® Sea Jet (5521) Take to Build?

A typical builder finishes LEGO® Sea Jet (set 5521, 401 pieces) in about 1 hour. Taking it slowly runs closer to 1 hour 25 minutes; building at a fast pace, about 50 minutes.

PieceTick estimates build time from piece count, part complexity, the set’s age rating, your experience level, and how you sort pieces. Adjust those on this page for an estimate matched to how you build.