All of the rotary stuff left here with the last race car,  so there is nothing to look at. So...this will be a guess.

12-A before 74.

A look at the front iron could tell the tale. Mazda kept removing bolts from anything they could, so, more bolt holes generally  means older piece.

Cavitation damage can be caused by letting the pump output outrun the suction side supply. So just limiting the output a bit with a restricter eliminates this kind of damage.  If you have seen a water jet cut through a 1/2" steel plate you might think this could happen on one long test flight...................

LEH     

In a message dated 6/9/2020 1:30:41 PM Eastern Standard Time, flyrotary@lancaironline.net writes:

Ryan, is it possible your water pump is off an old 12A?

Lynn Hanover is on this list and would be able to answer anything about 12A's ... maybe reach out to him directly in the subject line??

Jeff

-----Original Message-----

From: Jeff Whaley

Sent: June-09-20 8:02 AM

To: Rotary motors in aircraft

Subject: RE: [FlyRotary] Water Pump

Hello Ryan, this is a photo of my water pump from a 1988 13B ...  Jeff

All,

     

Can anyone point me towards the correct water pump? The one in the top of the photo is the correct one. The one on the bottom is obviously incorrect. It's the second one we've ordered.

The first one that I ordered looked identical to my original one.  However, when it arrived it was similar, but about 1/3 smaller than mine. When I ordered this second one we all (Carquest employees) poured over the pictures to make sure it was correct. When it arrived it had one less bolt hole than the one in their pictures.

I have a Powersport 13B. Any ideas what pump they ran and where a guy can order one

Thanks,

Ryan

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