Hans Conser wrote:

I spent two summers sucking water out of lakes, and our gasoline pumps
did the same thing:  They would cavitate unless you restricted the
output.

Hans Conser

In this case the pump is the primary load on the gasoline engine.
In the case of the Mazda the water pump is a minuscule load.
Also the Mazda pump is of course a closed loop system.

Paul Lamar
 
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