Hoping someone can answer this engine question. I was out at sea 2 days ago in someone else's rib & it basically starting overheating every time we went above 7 knots. After a couple of minutes above this speed 3 things happened:- the temperature gauge went off the scale, a warning alarm sounded, and the engine lost nearly all power. We then slowed to 2 knots till it cooled on the gauge, and chugged normally at 7 knots. This kept happening repeatedly, which mucked up the chance of 2 days rib use. (The 'tail' of cooling water flowing out looked normal).
I then returned the RIB and the owner is saying he finds nothing wrong with the engine?
This can only be a cooling system problem & I cant believe it can correct itself by itself ??
Can anyone throw some light ? Thanks,