I had to remove the gas tank to clean tank aand replace fuel lines and while I have it out the Tranny is easy to get to. Here is my info"
ModeL 917.270821
Engine # 42E707-2631 trim E1
Briggs & Stratton 19.5 HP
Carburetor 3 screw fuel pump
no number on carb.
Transmission Hydro gear
Model 319-0650I found a piece of hose connected to the top tranny plug and unscrewed it. I measured down from the top of case 2 inches before I struck oil. While it is apart I would like to know how to service it other than a good outside cleaning.
NOTE: It really slows down when hot and climbing uphill.
Thanks for any help on draining and replacing oil (I know how to purge---did it once last year)
Marvin
SEE PICS below
Tube and plug screwed in.

Tube and plug removed.

Another view.
