Amelia Earhart

[five.five-six]

I'm sure I'll eventually find it but one of the two light blue bushings from the ends of my propeller shaft on my older 6105 just pulled an Amelia Earhart.

I'm working on a clean workbench but it just diapered. Problem being that I can only find them as part of the Drive unit 6105.700 31.08 USD. Is there a part number for just that light blue silicone bushing?


Also, this pump was making more noise than I would expect. While inspection and cleaning I discovered one of the blades has a foil or lip on the leading edge. With my tired eyes I can clearly see it and can feel it by dragging my finger off the edge. It's a black propeller marked with a K and the number 45

Should I break that foil with a fine sandpaper or just leave it be?

 

[five.five-six]

I did find the light blue grommet or bushing or whatever it's called but I'm still wondering about the leading edge on that propeller.

 

[rvitko]

If it is black it is pre 2010 and you will probable see an increase in flow if you replaced it with 6105.700. I generally try to avoid any sanding or filing of the propeller because the most important to noise is that it is balanced, I have done it before but I try my best with a micrometer to keep each blade the same width. The black propellers were a model boat propeller we bought and are a mix of carbon, glass fiber and polyamide, they can delaminate especially from abrasion or strong acids, the new ones we mold, they are blue and made of POM, it is much more durable. You can buy a set of the shaft and bushings, part 6065.709, it is 8.57.

 

[rvitko]

I should point out the main reason the new one would result in an increase is the magnets get old, ferrite is manmade and a magnetic charge is imparted to it and it tends to lose strength over time. Usually past 5 years old you will see an improvement if it is replaced.