I do have some know how, I always do my own water pumps in this and my bigger boat this is my run about, I do my own winterizing and electical work until I hit a speed bump ! Now I told you a little about my expertise not a professional but I do the best I can, it saves money from paying shop fees.------------Now I will start from the begining at the wiring harness in reverse I have power to blue and green, In neutral power to green, and in foward no power to either.. Now with engine running I have reverse, nuetral prop turns slightly, and in forward prop act as if in nuetral.-----Next I checked the lower unit oil it was low and showed signs of water and small chunkes and shavings of metal. So I took the lower unit off, have the seliniod out and water pump out.---- But do not no how to get the gear houseing out so I can inspect it. Can you give me some insight how to do this or should I button it back up and take it to the shop. Would it be wiser to look for another lower unit?