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Mercruiser #470 overheating

"Ayuh,...

Could be Alotta t


"Ayuh,...

Could be Alotta things,....

I'd start with a New Impeller if it's been over 2 seasons...."
 
"I have a 470 connected to a h

"I have a 470 connected to a hamilton jet pump. The engine starts to overheat at higher rpms and blows fresh water out of the recovery bottle. I have a spare heat exchanger which I took to a radiator shop and had it cleaned and flushed, but hate to put it on until I backflush the engine to clear any scale or corrosion. How do you backflush the engine effectively?

Thanks,"
 
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