Engine question

[ivan4199]

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,

[Hightower]

What engine was it?

Did you check the lower leg and gearbox for plastic bags or weed?

Perhaps you were trimmed out too much and at the higher speeds the water inlet was out of the water?

[codprawn]

Originally Posted by Hightower

What engine was it?

Did you check the lower leg and gearbox for plastic bags or weed?

Perhaps you were trimmed out too much and at the higher speeds the water inlet was out of the water?

I agree - all possible!!!

Or even someone has left tape over the intakes to use a flushing port!!!

[Nos4r2]

Sounds like a jammed thermostat.

[ivan4199]

thanks for these thoughts - whatever problem was it seemed to mysteriously clear itself,
i did check the prop & lower leg at the time, maybe water inlet got something stuck in it & then cleared itself, Thanks anyway