Re: honda B F 50 impeller
The downside of installing the impeller on the shaft is that on this unit and many others the water pump housing is sealed by an o ring and as you twist that housing over the impeller the o ring can go wongo.Better on the o ring sealed units is to turn the impeller into the housing counterclockwise,as you look at it from the bottom of the housing ,slide both down the shaft and over the key.The last part may take a little patience as the impeller is not yet off center in the cup.