Had the boat out yesterday and it ran great for about an hour then all of a sudden, started sounding deeper and couldn't get the rpms up. Couldn't get the boat on plane.
Pulled the cover and everything looked fine, then saw this. Not sure if this is just a ventilator/breather line, but I hadn't seen it before. Comes out of the bottom of the engine block. What is this supposed to run to? Its a Johnson 225HO btw.
The power surged back on/off a couple of times leading me to believe that there may be some faulty electronics as well. Just wanted to post here before I start digging into it.