The Tigers were put down to their largest defeat under head coach Marco Silva after goals from Dominic Calvert-Lewin, Lukaku and Enner Valencia. His previous worst came against Fulham in a 4-1 FA Cup fourth round defeat in January.
A red card for key midfielder Tom Huddlestone at 1-0 down for a sliding tackle on Idrissa Gana Gueye with 17 minutes remaining. He made high and rash contact with the midfielder’s left leg.
Everton had previously broken the deadlock after nine minutes as two of their brightest young talents teamed up.
Tom Davies emerged on the right-hand side of Everton’s attack in the box, beating the offside trap, to put the ball across for Dominic Calvert-Lewin with his right foot. The young striker duly obliged to score his first league goal by stroking the ball into the middle of Eldin Jakupovic’s net with his right foot.
A win was made certain after 78 minutes when Lukaku found Valencia with a superb chip over the Hull defensive line, allowing his on-rushing fellow striker to take a touch with his chest and fire it past Jakupovic’s right hand with his left foot.
Valencia then turned provider for the side’s third in the first minute of second-half stoppage time as he stroked the ball through a hole in the Hull defence and between defenders Harry Maguire and Andrew Robertson. Lukaku then put the ball home with a low finish across the ground with his left foot, firmly finding the centre of the net.
The final touches to the result were made by the striker around the 94th minute. A poor back-pass from Omar Elabdellaoui then found its way to the edge of the box where Lukaku had run, with the Belgian having time to take a step-over, a touch and round the despairing Jakupovic to seal the victory with a right-footed strike. Maguire could not block the ball from hitting the net after a late dive in front of it.
The striker had previously warned the Hull defence and had to be denied on further occasions by Jakupovic as the keeper kept the scoreline respectable.
This result moves the Toffees up to sixth place in the league table with 50 points, level with Manchester United, who have three games in hand having played 26 games compared to their 29.
The best of the images from the match can be seen below.