Have a 5 HP Gamefisher and the prop will only turn left and right slightly before locking. I removed the prop and a plate that has 4 screws in it that reveals another area with a seal and behind it is the gears. Tried to get it ofg with a wheel puller after soaking 24 hrs. It will not pop the sealed area for access to the gears. It spins but will not pull out. The pressure applied pulled my wheelnpillet bolts out. Any suggestions