[C320-list] Changing the Impeller

[Warren Updike]

I am an aficionado of the Globe "Run Dry" impellers (Defender.)  I posed the
same question to them and they said the 6 blade and 10 blade are
functionally equivalent.  If you think about it, the volume of the area
inside the pump and rotation speed are the main factors.  6 or 10 blades
won't make much of a difference in the flow.  

Warren & Pattie Updike
1994 C320 #62 "Warr De Mar"

-----Original Message-----
From: Mark Gillingham [mailto:markgill at uwalumni.com] 
Sent: Friday, May 11, 2012 8:32 PM
To: C320-List at catalina320.com
Subject: Re: [C320-list] Changing the Impeller

Another pump question. I was able to get a Jabsco impeller that says it is a
replacement for Johnson 810b and is the correct dimensions with a screw for
the slotted shaft, but it has 10 blades rather than 6. Do the number of
blades matter if the other dimensions are correct?

Mark
Speakeasy #612