If it is a new to you motor, you will benefit by having a shop put the computer on it not only to see how it is programmed, but to also check for problem codes that may indicate a needed repair. That would also be a good time to do a scheduled maintenance on the motor, impeller, lower unit, spark plugs, etc. This is not a motor that you can tinker with in your garage.
Check domo-online for oil. If you buy by the case, it's cheaper delivered to your door than most dealers will sell it. I bought a three jug case and it came out to $37 delivered. The cheapest I've seen it at the shops was $34.50 and you have to have an Evinrude container, so you may as well buy it online. By the time you add sales tax, you are there.
2015 Seaark 1872 MV CC Etec-90
Two Helix 12 CHIRP SI's, , MinnKota Riptide ST80/i-pilot Link, Bob's Hydraulic
Bitter Gun Owner