correct Ujoint replace OMC sterndrive

[foilled]

will the Sierra 18-2104 (linked below) be the correct replacement for my 87 OMC cobra? https://www.amazon.com/gp/product/B0...KIKX0DER&psc=1

 

[Bondo]

OMC 3850812, 912214, 915716,

Well,..... The link says it replaces these OMC numbers,......

 

[foilled]

Well,..... The link says it replaces these OMC numbers,......

im not sure what omc numbers mine is or which i need