Snip

Tracy, the 20B has what kind of pump? Never mind who would supply a
replacement (Mazda racing?)! The volume must be higher, and what else is
different? Anyone know?
Marc Wiese

As I recall the 93 13B and later pumps won't fit the 92 13B and earlier.
For one thing they use a poly V belt and rotate opposite as I recall.

I am interested in a 92 and earlier 13B aluminum cartridge. Is that what
we are talking about here?

Paul Lamar

I'm looking for the aluminum pump cartridge that fits 89 - 91 13B for the
engine on my RV-4, which I think is the series 4.  I'm not sure what my 20B
needs since it is a bastard engine composed of all sorts of assorted parts.
But I do think the front sidehousing is an actual 20B part.  I have a water
pump for it (large diameter impeller) but it is an iron cartridge.

Tracy Crook
tcrook@rotaryaviation.com
www.rotaryaviation.com

      Tracy in your copious free time would you compare the impeller of your
 20B pump to 13B(diameter,etc.)and report same?

      Paul my 13B Cosmo pump is not Kubota like 93+ 13BREW(series 6 down under).
 The 13B Cosmo pump is same as 89-91 13B (standard rotation) using poly-V belt
 as previously posted.

     Kelly Troyer

Are you sure about the belt routing?

Paul Lamar
 
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