WAB, yours dosent look that bad so it might not be a issue. Mine was doing that really bad last season when I switched oils. The cheaper oils do it worse for sure, if you run a full synthetic it will be MUCH better. I made a post about different oils and how they mix with water and make the foam. Mine was so bad it would cause the ski to run like crap and make it extremely hard to start, the foam would actually bleed down when I shut the ski off and would take a good solid minute to plane at full throttle on startup.