Tricks struck three times, in addition to further goals from Charley Sanders and Joe Briers, as the Pilgrims opened the new league season with aplomb.
United conceded first, before scoring five times themselves before and after half-time. Celtic restored some respectability to the scoreline with further strikes on 78 and 84 minutes.
Boston (4-4-2): Marc Hipwell; Niall Delahoy, Luke Wilson, Jordan Nuttell, Sam Towell (Todd Devlin 46); Joe Briers (Scott Langan 46), James Reed, Jake Beauchamp, Jake Platten; Charley Sanders, James Tricks (Jonny Butler 60).