bassin_louisiana
Seaman Apprentice
- Joined
- Sep 17, 2017
- Messages
- 46
Hi folks, I?m fairly new to outboard maintenance. The oil level on my 1997 Mercury 2-stroke 40hp is low and I need to add oil. I recently had the lower unit oil changed so that should be fine. My question is: do I simply pour the oil in the top or do I have to drain the old first? From what I understand, this is an oil injected outboard. Also, do I need to change an oil filter when I add new oil? Any advice on adding new oil, draining old, the process, etc. would be much appreciated. Thanks!