Water Pump Impeller

I opened up the water pump on my 99 WR to change a leaky seal and found the impeller had sheared from it's nut to leave it free behind the nut ! :)

It's obviously still been turning as I haven't overheated and also by the marks......

Has anyone else had this prob, if so did you use Yam parts again of is there an aftermarket alternative ???

I had that problem once... but after I changed it to the 2000 WR400F impeller shaft, It works excellent :):D

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