Return-Path: Received: from fed1rmmtao06.cox.net ([68.230.241.33] verified) by logan.com (CommuniGate Pro SMTP 4.2.5) with ESMTP id 554817 for flyrotary@lancaironline.net; Fri, 03 Dec 2004 10:33:38 -0500 Received-SPF: none receiver=logan.com; client-ip=68.230.241.33; envelope-from=ALVentures@cox.net Received: from BigAl ([68.107.116.221]) by fed1rmmtao06.cox.net (InterMail vM.6.01.04.00 201-2131-117-20041022) with ESMTP id <20041203153307.QTPZ29028.fed1rmmtao06.cox.net@BigAl> for ; Fri, 3 Dec 2004 10:33:07 -0500 From: "Al Gietzen" To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: (unshrouded plug ?)required wrench Date: Fri, 3 Dec 2004 07:33:11 -0800 Message-ID: <000701c4d94d$660661e0$6400a8c0@BigAl> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0008_01C4D90A.57E321E0" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.6626 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2180 In-Reply-To: Importance: Normal This is a multi-part message in MIME format. ------=_NextPart_000_0008_01C4D90A.57E321E0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit >If I end up using these plugs full time later, I will consider Lynn H's >suggestion to remove the eyebrows on the block, but really like to know >why Mazda went to the trouble of putting them on before grinding them off. Simply looking at the eyebrows, they seem to serve no purpose other than to make it impossible (or at least very difficult) to put in a 13/16" type spark plug. Perhaps this is their intended purpose. That is exactly their purpose. My understanding is that the chief concern was the risk of a piece of broken insulator from an unshrouded plug finding its way into the combustion chamber. I expect to replace plugs on a more frequent basis to reduce that risk. It's looks to me like it would take more than removing just the "eyebrows" to use a stock socket on the B9EGV, especially on the leading plugs. Al ------=_NextPart_000_0008_01C4D90A.57E321E0 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

>If I end up using these plugs full time later, I will consider Lynn H's =

>suggestion to remove the eyebrows on the block, but really like to know =

>why Mazda went to the trouble of putting them on before grinding them = off.

&nbs= p; Simply looking at the eyebrows, they seem to serve no purpose =

other than to make it impossible (or at least very difficult) to put in a =

13/16" type spark plug. Perhaps this is their intended purpose. =

That is = exactly their purpose. My understanding is that the chief concern was the risk = of a piece of broken insulator from an unshrouded plug finding its way into = the combustion chamber. I expect to replace plugs on a more frequent basis to = reduce that risk.

<= /font>

It’s = looks to me like it would take more than removing just the “eyebrows” to = use a stock socket on the B9EGV, especially on the leading = plugs.

<= /font>

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