ok we have a 4310 jabsco pump and a merc io big block we needed to put a impeller in it and i though the merc 47-59362Q01 would work but in taking it apart the Jabsco pump has 10 blades and the merc has 8 will it work or do i need a the Jabsco impeller

Yes.I have the jabsco brass pump and i use the merc. impeller all the time.

it will work, but the jabsco impellar is a bit better. It is also more expensive. West Marine has them usually.

they are out of stock and can't get one before Wed. but we have 5 of the merc impellers

well that sucks. You could always order one from here, but it wont get there any faster.

http://store.hamiltonmarine.com/brow...60/4,6284.html