My Johnson 90hp seems to have some strange bubbles coming from below the waterline. Is this normal or an issue? See short video I took. https://youtu.be/JnIY7HwAvVs
What is escaping below the waterline would normally be what's left of the combustion which is being blown out the exhaust outlets. This would contain air that would result in bubbles. I can think of nothing more than this that would be responsible.
