THE LINNETS stormed to a 2-0 victory to make it through to the semi finals of the Dr Martens League Cup for the fourth consecutive year.
Goals from David Staff and Chris Bacon sent Lynn through as they claimed their second Premier Division scalp in the competition.
The tie was finally completed at the third time of asking after a deluge of bad weather and Grantham
including three ex-Linnets, must have thought they were playing at Chelsea's Stamford Bridge, with nearly as much sand on the pitch as grass.
But it was Lynn who adapted better to the surface as 396 people braved a chilly February evening to witness a deserved Lynn win.
Linnets boss Peter Morris said: "It was a good win, well deserved and we're through to the semi-finals.
"I thought we ran Grantham' ragged at times. They couldn't cope with our movement and pace off the ball, and we could have gone through 4 or 5-0 winners."
On the goals, Morris said: "It was a good strike by Bacon, who got better in the last 20 minutes. I took him off as I wanted to get the new lad on.
Of man-of-the-match Dave Staff he said: "Staff is quick, he's got two good feet and usually hits the target, which is a big plus."
The first half chance came the way of Grantham when Jon Hawley hit a free kick straight into the arms of Steve Wilson from outside the box.
Lynn's first chance saw Jones test the reflexes of visiting keeper Mario Ziccardi in the 10th minute following some neat approach play from Carl Holmes.
A minute later Chris Bacon fired Lynn into the lead with a thunderous shot on the half volley which left Ziccardi grasping at thin air. Midway through the half Paul Raynor picked out Staff with a peach of a pass, but his cross was well dealt with by Ziccardi.
Some stubborn Grantham defending denied the Linnets a second goal 13 minutes before the break with two last-ditch clearances foiling Holmes and Jack Defty.
Five minutes before the break Stuart Wilson saw his scorching effort rattle the upright in a rare Grantham attack.
In the 53rd minute Holmes shot wide of the target when well placed in the box.
The second Lynn goal eventually came in the 57th minute when Staff waltzed round a handful of players before side footing home.
In the 66th minute Wilson blazed Grantham's best chance of the match over the top of the bar from eight yards out.
Ex-Linnet Wayne Hallcro was replaced by Lee Marshall, while former Lynn midfielder Jason Minett's introduction was greeted with a chorus of boos in the 76th minute.
Recent acquisition Jordan Blyth made his Linnets debut in the 81st minute and showed plenty of promise after replacing Adam Weston.
Lynn: Wilson, Jones, Cowling, Burrows (Blake), Fuff, Defty, Weston (Blyth), Raynor, Bacon (Watts), Staff, Holmes. Subs not used: Harvey, Nobes Referee: Pollard Att: 396