Problem turning engine over
I have a 1989 Jeep YJ. I was driving it and it has been running fine, I stop to get something to eat and when I try to start it back up the engine will not turn over. I happened to park on a hill so I get it rolling, pop the clutch and off I go. I figure the battery has gone bad so I take it out and have it tested and it is fine. Next I figure it must be the starter, take it out and down to be tested, it's working but there are obvious signs of wear so I replace it and still the engine won't turn over. It acts like it wants to but it won't, maybe turns a 1/4 turn and that's it. The engine is a 2.8L V6 (not my idea, was in when I bought it). Any ideas as to what the problem could be?