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Date: Sat, 05 Mar 2011 22:36:46 -0500
From: cbeazley <cbeazley@innovista.net>
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To: flyrotary@lancaironline.net
Subject: re: 20B Numbers?
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Here are a few old posts with additional 20B ID information:
http://www.rx7club.com/forum/showpost.php?p=8502073
http://www.rx7club.com/showthread.php?t=108091&highlight=what+20b
http://www.rx7club.com/showthread.php?t=896271

Cheers
Cary

> From: Marc Wiese
> Sent: Saturday, March 05, 2011 2:22 PM
> To: Rotary motors in aircraft
> Subject: [FlyRotary] Re: 20B Numbers?
>
>
> 20B MAZDA in black outline paint; C927 on all three rotor housings….
>
> Marc
>
>
>
> From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] 
> On Behalf Of Thomas Giddings
> Sent: Thursday, March 03, 2011 7:57 PM
> To: Rotary motors in aircraft
> Subject: [FlyRotary] Re: Numbers?
>
>
>
> Here you go everyone: The engine should be stamped on all the rotor 
> housings and sideplates. Look on the top of the rotor housings where 
> is says "Mazda 20B"
>
>
> Pre A code: 3 digit numbers only, no letter
> A code : Letter A and 3 digit #
> B code : Letter B and 3 digit #
> All of the above are small dowel pin land motors
>
> C code: letter C and 3 digit #
> D code : letter D and 3 digit #
>
> The C and D code have the upgraded sideplates, thicker dowel pin 
> lands. Approx: 4mm thicker