Does a 2 stroke outboard put oil in the water?

Yes, a 2-stroke outboard engine typically mixes oil with fuel for lubrication, and some of this oil can be expelled through the exhaust, leading to oil residue in the water. This is a notable environmental concern, as it can contribute to water pollution. In contrast, 4-stroke engines usually have separate oil systems, resulting in less oil being released into the water. However, maintenance and proper operation are key to minimizing environmental impact in both types of engines.