Use the merc manual and you can't go wrong!! If you do not have one....
get one...well worth the investment if you plan on doing your own maintenence. You should be able to find the correct manual on the I-boats
boating forum. They are great people and willing to help in many ways. I was able to download the entire service manual for my engine/outdrive onto my thumb drive in about 20 minutes at no charge, that is 1200 pages worth of info. Now I just scroll thru until I find the info I need and copy just that material.

Airshot