A champagne first half was followed by a rather flat second but Eastcote still had too much fizz about them for lowly PHC Chiswick.
Paddy Ashton opening the scoring and further goals flowed from Ben Green, Gary Towns, a second from Green and Alex Stobbart, who continues to fulfil his youthful promise, as the Boars stormed into a 5-0 lead.
Flowing moves and good midfield support was a feature of their play and it looked promising for the second half despite leading scorer James O'Shea resting a sore hamstring.
However, Chiswick opened the scoring after the break from a rare attack and when they added two more goals there were some worried faces as the Boars found their advantage had been trimmed to 5-3.
A good move down the right from David Cooper, who slipped the ball back for Towns to net his second, steadied the ship and ensured Eastcote held on to the three points that took them up to fourth place and only three points off the top of the Middlesex, Berks, Bucks and Oxon Regional League, with a visit to bottom placed Tring to come on Saturday.
The second team went down 3-2 at Sevenoaks despite Wes Morrick giving them the lead and they also missed a penalty stroke. Chris Sleeman got the other goal.
Josh Moore grabbed the only goal as the thirds beat Staines III while the fourths came from behind to draw 3-3 at Rover Oxford and the Simbas dropped their first points in an ill-disciplined 1-1 draw with British Airways.
The Fifths, Eighths, thanks to Graham Dale's late winner, and Past Masters also won.
Surbiton 12 Eastcote 1
Eastcote collapsed to a humiliating 12-1 defeat away to South League Division Two leaders Surbiton despite holding their own at 1-1.
The hosts took an early lead but Katy Brown and Anita Huntley combined at a short corner, Brown finding the net, to level the match and Eastcote had chances to go in front but could not take advantage.
Surbiton struck twice to take a 3-1 lead into half-time before Eastcote found themselves on the end of a clinical display of finishing as the home side scored nine times in the second period.
Eastcote are just three points clear of the relegation zone with fifth-placed Woking 1A to visit on Saturday.
Liz Walker's goal gave the Twos a 1-0 win over Hendon and took them to the top of the Middlesex Premier League, while the Threes beat Bahl 2-1 but the Fours and Fives lost.
COLTS ANNABEL Fields notched a second half hat-trick as the U15s girls came from behind to beat Vectis 3-2 in the first round of the National Plate.
The Isle of Wight visitors opened the scoring against the run of play after Amy Sharman and Fields were unable to make chances count but in the second half Eastcote stormed back as Fields found her range three times.
Despite Vectis pulling a goal back Libby Brookes and Becky Rawlinson defended well to take their side through to the second round.