i am trying to order a new tilt motor for my 87 bayliner capri volvo penta aq131a 275 drive. can anyone give me the part number i need to use, i cannot read mine. the volvo parts says it is a 850834 but when i search this part number on line i get a -3 on the end of the part number on sites like ebay and it says it will work on AQ131 but does not list AQ131A. Is AQ131 and AQ131A the same? Anyway i have found a lot of tilt motors on places like ebay but i just don't know what to order. any help would be appreciated. thanks.