A friend of mine asked me to look at his 93 Evinrude 30. He bought it with a boat and was told it only started in forward gear at full throttle. I opened it up and it is a mess - leaky carb, I’m surprised with all the broken pieces the recoil even worked at all, but the one I can’t see an obvious cause for is that it is stuck in forward. The shifter moves as it should, but it stays in forward. What’s my best next move to figure that out? Most of the ones I have worked with are from the 70’s or earlier. Any advice is much appreciated