2005 Roketa 250cc water pump replacement By jfmjr442 (Read 933 times)

[jfmjr442]

I am resurecting a 2005 Roketa 250cc (linhai 257cc clone motor) water cooled scooter.  In replacing fluids no coolant flow so I removed the water pump front half to see the impeller is spinning freely and not on the shaft - so I ordered new pump.

When removing the inner half of the water pump all of the crankcase oil drained though a whole in what appears to be a bearing on the shaft.  I previously had motor running - no mixing of oil and water anywhere.  Is it normal for oil to drain when water pump is completely removed?  Am i safe replacing WP and then refilling oil and cooling system.  Not sure if what i am experiencing is normal or not.



TIA



John 

[crwford]

I believe that's how shaft is lube in lower end they the bearing aren't sealed right?

[jfmjr442]

Correct not sealed. After closer examination I think it's normal

thanks

John

[4950cycle]

If the coolant stream is not separated from oil supply by any kind of seal what the heck keeps things from mixing ?