Doubles from Jon Breger and Eddie Sternberg, plus a 35-yard special from Dave Grossman secured the points.
David Wolinsky and top-scorer Aron Gale (2) registered for the Pirates.
Jubilant FC Team player-manager Mitch Young told JC Sport: "In the end it was a comfortable win, although we made hard work of it.
"It would be nice to cut out all these silly goals we concede. Their keeper kept the scoreline from going into double figures in the second half.
"Given all the unavailabilities and suspensions we had we done well to play so well and from next week onwards we welcome back a number of players to the squad."