the 68 vs the 72 is not affected by the cog on the engine, but the tip of the chain bar; to be sure get a husky bar to match..... but I would say "probably." which doesn't help. worst case is to get this one and put it on and having to get a husky bar... the price of this chain is VERY good; I bought 3 of them
I am not sure why the official site doesn't show it, but i can personally verify that this is the right chain for the saw. I purchased two additional chains with the saw and swap them out in the woods while cutting all day. They are identical to the original in every way i can see and work just as well.