Promotion-chasing Morecambe gave 10-man Stevenage a lesson in finishing.
Michael Twiss opened the scoring for the home side, tucking the ball into the bottom corner of Alan Julian's net.
Gary Hunger picked his spot and drove the ball in for the second and just before the interval Garry Thompson added the third with a low drive.
Jon Nurse's whipped shot reduced the deficit, but Justin Gregory was then sent off, before Wayne Curtis emphatically finished to seal the win.
Morecambe: Robinson, Walmsley (Ruffer 90), Bentley, Kempson, Perkins, Thompson (Blackburn 61), Hunter, Kelly, Curtis, Carlton (O'Connor 79), Twiss.
Subs Not Used: Dodgson, Davies.
Booked: Bentley, Carlton.
Goals: Twiss 12, Hunter 25, Thompson 40, Curtis 90.
Stevenage: Julian, Warner, Laker (Maamria 45), Hocking (Berquez 79), Gregory, Weatherstone, Bulman, Henry, Boyd, Nurse, Elding.
Subs Not Used: Quinn, Goodliffe, Gore.
Sent Off: Gregory (70).
Booked: Nurse, Gregory, Warner, Henry.
Goals: Nurse 60.
Ref: D Cummings.