I'm looking to replace my impeller on my water pump. The motor is an 86 evinrude 60hp. The only thing holding me back is disconnecting the shift rod at the shift disconnect coupler. It's an intimidating bolt to undo. there's no room to get a socket onto the nut because its too close to the housing. And it's in such an awkward location a wrench cant get to it either. I have the sealoc manual but not much is mentioned about this step. Are there any tricks or approaches im not seeing? with everything from carbs to fuel pump to starter off the motor this still seems like i need a special tool or some insider info. please help.