X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from fed1rmmtao102.cox.net ([68.230.241.44] verified) by logan.com (CommuniGate Pro SMTP 5.2c1) with ESMTP id 2554778 for flyrotary@lancaironline.net; Tue, 04 Dec 2007 01:18:11 -0500 Received-SPF: none receiver=logan.com; client-ip=68.230.241.44; envelope-from=alventures@cox.net Received: from fed1rmimpo02.cox.net ([70.169.32.72]) by fed1rmmtao102.cox.net (InterMail vM.7.08.02.01 201-2186-121-102-20070209) with ESMTP id <20071204061732.WHB16731.fed1rmmtao102.cox.net@fed1rmimpo02.cox.net> for ; Tue, 4 Dec 2007 01:17:32 -0500 Received: from BigAl ([72.192.143.193]) by fed1rmimpo02.cox.net with bizsmtp id LWHX1Y0054AaN600000000; Tue, 04 Dec 2007 01:17:31 -0500 From: "Al Gietzen" To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: Hard starting - the saga continues Date: Mon, 3 Dec 2007 22:17:41 -0800 Message-ID: <000001c8363d$60878be0$6401a8c0@BigAl> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0001_01C835FA.52644BE0" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.6626 Importance: Normal In-Reply-To: X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.3198 This is a multi-part message in MIME format. ------=_NextPart_000_0001_01C835FA.52644BE0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit I have also noted weak, and sometimes missing spark when cranking with the starter. I thought I might be seeing coil degradation until I checked with test mode on the EC2 (mode 8?) and found sparks jumped well over an inch on all coils. OTOH; I have never had any difficulty starting the engine. Al -----Original Message----- From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Tracy Crook Sent: Monday, December 03, 2007 7:02 PM To: Rotary motors in aircraft Subject: [FlyRotary] Re: Hard starting - the saga continues It is odd about being both rear plugs. Only thing that comes to mind is that missing rear sparks can be caused by low cranking speed (below the EC2 minimum of about 120 rpm). Probably not the case since you mentioned that it really cranked over smartly with the plugs out. Tracy On Dec 3, 2007 5:52 PM, Steve Brooks wrote: I did see intermittent spark on the D581 coils as they were going bad so that's a real possibility with your symptoms. But could be fouled plugs too. Which coils are you using? I still have 3 of this type on my engine but they have a cooling plenum over them. The WILL fail without cooling as I verified 3 times. Never seen a D580 go bad but never say never. ------=_NextPart_000_0001_01C835FA.52644BE0 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

I have also noted weak, and = sometimes missing spark when cranking with the starter. I thought I might be = seeing coil degradation until I checked with test mode on the EC2 (mode 8?) and = found sparks jumped well over an inch on all coils.

OTOH; I have never had any = difficulty starting the engine.

Al

-----Original = Message-----
From: Rotary motors in = aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Tracy Crook
Sent: Monday, December = 03, 2007 7:02 PM
To: Rotary motors in = aircraft
Subject: [FlyRotary] Re: = Hard starting - the saga continues

It is odd about being both rear plugs. = Only thing that comes to mind is that missing rear sparks can be = caused by low cranking speed (below the EC2 minimum of about 120 rpm). = Probably not the case since you mentioned that it really cranked over smartly with = the plugs out.

Tracy

On Dec 3, 2007 5:52 PM, Steve Brooks <cozy4pilot@gmail.com> = wrote:

I did see intermittent spark on the D581 coils as they were going bad = so that's a real possibility with your symptoms. But could be fouled = plugs too. Which coils are you using? I still have 3 of this type = on my engine but they have a cooling plenum over them. The WILL fail without cooling as I verified 3 times. Never seen a D580 go = bad but never say never.

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