I just repowered with a Beta 35 and the Seaprop saildrive. I decided to see what it takes to change oil in the saildrive with the boat afloat. The manual gives a procedure to pressurize with a pump and two procedures to extract via suction..problem is I cant see how either would work and the manual is very very poorly worded (translated). Betamarine West has no info as they say they do not deal with many saildrives. So they sent my questions to Beta UK. All they did was send back a screen shot of the manual with no answers to my specific questions. I have not tried to communicate with Beta NC. So, does anybody here have this saildrive that may be able to help?