50 GI V8 250 overheats at high speed

[pkuhl]

"It overheats at high speed at

"It overheats at high speed at times and then if we stop and rev the engine in neutral it cools off, and then will be ok for use at higher speed again."

 

[el_pescador]

"Your raw water pump impeller

"Your raw water pump impeller may be worn or your exhaust manifold/risers water passages could be clogged. Also, you could have a faulty thermostat."