Do yourself a favor and get a parts book for that model. Johnson or Evinrude dealers can get most parts but probably don't have the book to look them up so they won't give you the time of day. They are much more friendly if you go in armed with the part number and all they have to do is collect your money.
outboardbooks.com has the parts books
a good on-line parts source is ishopmarine.com You need the part number.