What's your opinion & why on water pump replacement parts?

[Bduck]

I just went thru checking both of my motors. Main was good after 3yrs but have a replacement kit stowed. Kicker impeller on the other hand was looking a little beat down with bent out of shape between 1/2 formed curved paddles and other 1/2 straight 8yrs. Started to get some intermittent sputtering this past season from P-stream, finding a combination of scale buildup. I do agree with what has been mentioned.

 
                                

This is from my Yamaha F150 from about 3yrs ago. The plastic impeller housing had a meltdown blocking port for water flow. I have NMEA 2000 that I have set up on my fishfinder allowing me to see some engine parameters catching overheat condition. It would only overheat at higher rpms. The root cause was a bad thermostat which was stuck partially opened. The impeller took some heat treatment also. Modern fishfinders will come equipped with a setup for monitoring engines, its a worthwhile investment to purchase a NMEA 2000 starter kit which can be added on. Other than that, a overheat condition will sound off an audible alarm which is why I caught the visual condition.