1976 4.5 hp mercury outboard lower unit removal

[enginedude]

Can anyone tell me how to drop the lower unit so I can change the impeller. I only see on nut. I know you have to move the shift shaft coupling but I never worked on a merc before can anyone help

 

[Laddies]

Re: 1976 4.5 hp mercury outboard lower unit removal

There is one nut under the cavition plate 1/2" and one in the front at the top of the plate 9/16"