Flat, error-ridden and losing first five Pier Francis to a torn ear during a disappointing first stanza, the home team were under the knuckle from the Taranaki pack and the skills of McKenzie, who was full of guile with his feet and accuracy with his boot.
There would have been little for the Blues brains trust of Alistair Rogers and Tony Hanks, on hand, to enthuse over. The first half was a messy, slippery affair punctuated by a couple of sweet tries, the first to Steelers wing Sione Molia from a Francis kick-pass after a searing August Pulu break. McKenzie ran like his brother to set up fullback Stephen Perofeta for Taranaki's second. Pulu's kicking game, alas, was not as sharp as his running game.
Taranaki centre Sean Wainui scored in the second minute from a spectacular Mitch Crosswell offload. Crosswell's late second spell try allowed the visitors to regain a late lead and pour the pressure on the Steelers, eventually taking the win.
Counties Manukau are straight back into action on Sunday when they travel to Eden Park to face Auckland, while Taranaki face Waikato for the Ranfurly Shield later that day.
Taranaki 30 (Sean Wainui, Stephen Perofeta, Mitch Crosswell tries; Marty McKenzie 3 con, 3 pen)
Counties Manukau 29 (Sione Molia, Jordan Taufua, Sherwin Stowers, Richard Judd tries; Joe Reynolds 2 con, pen, Piers Francis con)
HT: 20-7 Taranaki
