A disastrous first 25 minutes proved decisive as Ashington last at the Rec to Acklan on Saturday.
The home side found themselves 36-0 down as they leaked six early tries to a well drilled Acklam side playing free flowing rugby.
During this period Ash also lost scrum-half Justin Niblock to what seemed like a serious knee injury.
The home side began to claw their way back into the game and the changed front row of Rosser, Pritchard and Henderson, after initially struggling, began to get some parity.
This seemed to give the rest of the forwards confidence, with Butler, Johnston, Newman and Dickinson all carrying strongly.
But the home side were unable to turn late first half pressure into points and turned around at the interval 36-0 down.
Ash started the second half strongly and from a series of driving mauls and forward drives second row Harrigan crashed over from two metres for a deserved try, converted by Elliott.
Ash were now playing to their strengths through the forwards, and in a repeat showing, after a series of strong forward drives, Harrigan again went over from close range for his second try, again well converted by Elliott.
The visitors extended their lead with a late try, in what had been a much better second half performance from Ashington, who wish they had started the match as strongly as they finished.
The game was sponsored by Arch.
Elsewhere, Ash Pirates won 46-36 at Ryton.