You need to get a factory service manual for your year & model.
It sounds like you are considering a Seloc or Clymer service manual, something I strongly advise against buying.
If I had one of those aftermarket service manuals, I'd use it only as a paperweight or to start fires.
There are critical differences and details pointed out in the factory service manuals that are not covered in the aftermarket ones.
Search for Part #507874. My factory manual "should" cover your year model. Please do some basic checking and verify.
You primarily have two options.
https://www.outboardbooks.com/ or E-Bay. I cannot give any direction on any websites that sell the factory service manual in PDF format.