The Pilgrims journeyed to Studley Sports Centre to face title-chasing Solihull Moors.
United were beaten 4-0 as the Moors climbed into first place in the league table.
Boston: Austin Barker, Finley Hipkin, Oliver Houlston, Toby Cotton, Kirils Snikeris, Jake Thompson, Zac Hardy (Sam Finch 60), Sean Bray-Smith, Rueben Fogg (Josh Panton 23), Will Pettitt, Rhys Smaller (Denis Matei 76). Sub (not used): Lake Taylor-Peak.
Referee: Jason Porter.