There are blocks attached to the top of the keel that gives it purchase. I have never looked on a 6.9, but have many times on a 7.9. I have found 3:1 and 4:1 purchases. Not sure why they offered two types. Maybe they increased the purchase with later models. So, need to remove the deck plate so you can see if there is a problem with them. Also check the sheave that the tail line turns on as it feeds back to the winch. If that is shot, you need to replace. If all of that is OK and there is nothing interfering with the keel in the trunk, like barnacles, fish (I have seen fish stuck in them), or the keel hasn't split and is thicker to inhibit smooth raising or lowering, then maybe you need to find a stronger crew member, or you need to work out more to develop your arm muscles. Also maybe a 10" winch handle would give you more leverage than an 8" winch handle. Last two resorts are: electric winch or electric winch handle.