I am trying to remove the lower unit on my 120 Force but I can't get it to fall loose. I have removed the 5 nuts and now it appears like it is hanging up on the shift shaft. I can shake the lower unit and see air space between mid-housing and lower unit but can't get it to lower down. Is there a secret to getting it loose from the shaft? I can see where it disconnects from the top of the engine. The manual is of zero value as it says to just pull it away. I have tapped it with a rubber mallet and no success.