"Do you like him?"
Why is "czy lubisz go" right and "czy lubisz jego" wrong?
The both are in the table of pronouns as equivalents for third person masc. sing. acc. (along with niego).
Something to do with position of the pronoun in the sentence I'm sure, I remember reading that jego was more emphatic, but I can't find any exact info on placement...
Long pronouns jego and jemu cannot stand at the end of the sentence unless they're in a stressed context.
A stressed context is at the beginning of the sentence, in an enumeration joined by i, lub, albo or similar, after nie, contrasted with something else using a, and in few other rare situations.
In a stressed context you must use jego, jemu, ciebie, tobie, mnie, siebie, not go, mu, cię, ci, mi, się
Sure, but more likely in spoken question, better is "(Czy) Lubisz/Lubicie go?" ... where "Czy + (ty/wy)" - Do you... can be dropped, and "go" comes of course from "jego" - him.