Pontoon Pump Forces: Understanding Inertia

[davidnixon5]

Hi all.
I have a pontoon pump, that when activated takes off in a particular direction. It has been described as inertia, however my understanding of inertia is angular momentum, so not sure why this would make the pump go in a particular direction.

I originally thought it was because the pump accelerates water in one direction, therefore the pontoon goes in the opposite. Any help and reference material would be great.

 

[mfb]

however my understanding of inertia is angular momentum

That does not make sense.

I originally thought it was because the pump accelerates water in one direction, therefore the pontoon goes in the opposite.

Right