Re: 45 HP wont go in neutral?
Now, unfortunately, I think you need to disassemble the lower unit and see if the prop shaft is binding in the forward gear bushing.
If you can imagine this, the prop shaft is held into the forward gear by a bronze bushing and at the rear by a ball bearing in the rear gland (part held on by two allen nead screws). both gears are constantly in mesh with the pinion and both turn constantly. Both gears ride freely on the prop shaft and the dog clutch, which is splined to the shaft, selects which rotating gear will be meshed to the shaft, thus deciding direction of turning. IF the prop shaft is corroded or otherwise jammed in the bushing in forward gear, then it will effectively be locked in forward in neutral and forward. So it is the only other thing I can think of to check.
You need to drop the lower unit and unscrew the nut on top in the pointed forward end. When you remove the rear gland, you need to remove the nut just inside it. Now, you can drop the gearcase torpedo. If the long stud in the front is corroded, this will be difficult. After dropping the torpedo, the reverse gear and shaft should slide right out. If you need to pull hard on the shaft or if it will not come, or if the forward gear comes with it, then it is jammed into the forward gear bushing.