Re: 1997 bayliner2050 3.0 Mercrusier
Howdy,
Welcome to iBoats!
Your have an Alpha GEN II type outdrive.
The speedo pitot is in the drive and the speedo hose is connected to transom mount on the inside as shown in the following PDF.
right click on it and select "SAVE AS" to your desired folder. Open it using Adobe Acrobat or other PDF viewer.
http://www.boatfix.com/merc/Techbk/96/96HS2.PDF
Page 4 will show the location of the pitot hose connection.
You may have a problem with the drive pitot being plugged with dirt or debris.
The Mercury Service manual has a simple procedure for clearing it using a drill bit.
Regards,
Rick