Need help. Just bought a pontoon with this motor on it. No manuals or any literature. I was surprised to find 2 vents and 2 drain plugs on the foot...never seen this before. The oil was coal black, however no metal shavings. Why 2 plugs and does it take 80/90 oil? What do they use in the power trim and tilt. Really appreciate your response...I have ordered a repair manual. Thanks.

