Re: johnson parts on a evinrude
I think you have the model number wrong.  It should be E25RLCRD.
These numbers are all 25 hp 1984 Evinrudes with various different options but would have many interchangeable parts 
 E25ECRS  E25ELCRS  E25RCRD  E25RLCRD  E25RWCRD  E25RWLCRD E25TECRD  E25TELCRD 
The Johnson numbers equivalent are
 J25ECRS  J25ELCRS  J25RCRD  J25RLCRD  J25RWCRD  J25RWLCRD J25TECRD  J25TELCRD 
The same apart from a J instead of an E  The parts are all basicaly interchangeable apart from decals and paint colour
CR are the date letters for 1984 and you will find an explanation of the code 
HERE
Obviously there will be many parts interchangeable from other years which you can check in the parts lists.  Crowley's website has already been mentioned.  The BRP lists are 
HERE and the same info is also 
HERE
Personally for just checking part numbers I prefer the BRP website
Some parts will be interchangeable over just a few years as minor changes are made. Other parts remain the same for many years 
There are also many parts interchangeble with other models. I think you will find many similarities between 20, 25 and 35 hp models.