The Pilgrims prevailed against bottom side Maltby Main at Sheffield Hallam Sport Park courtesy of three goals inside the first half an hour.
It maintained United’s title challenge in Division H following Basford United’s victory over Football CV Reds.
Boston (4-3-3): Seth Greeves; Jack Brown, James Gordon, Jack Withers, Callum Rodger; Jordan Tate, Peter Evison (Arkadiusz Michalczyk 60), Haydn Havard; Jenson Ball (Connor Stocks 46), Liam Adams, Maison North.