Return-Path: Sender: (Marvin Kaye) To: flyrotary@lancaironline.net Date: Sun, 28 Mar 2004 21:52:21 -0500 Message-ID: X-Original-Return-Path: Received: from fed1mtao06.cox.net ([68.6.19.125] verified) by logan.com (CommuniGate Pro SMTP 4.2b1) with ESMTP id 3132330 for flyrotary@lancaironline.net; Sun, 28 Mar 2004 21:34:38 -0500 Received: from smtp.west.cox.net ([172.18.180.57]) by fed1mtao06.cox.net (InterMail vM.5.01.06.08 201-253-122-130-108-20031117) with SMTP id <20040329023436.OXJF19401.fed1mtao06.cox.net@smtp.west.cox.net> for ; Sun, 28 Mar 2004 21:34:36 -0500 From: Dale Rogers X-Original-To: "Rotary motors in aircraft" Subject: Re: [FlyRotary] blasting plugs (was: Renesis & RD...) X-Original-Date: Sun, 28 Mar 2004 21:34:35 -0500 MIME-Version: 1.0 Content-Type: multipart/mixed; boundary="----=____1080527675763_Kan4_IT0dQ" X-Original-Message-Id: <20040329023436.OXJF19401.fed1mtao06.cox.net@smtp.west.cox.net> This is a multi-part message in MIME format. ------=____1080527675763_Kan4_IT0dQ Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit John Slade asked: > Is it ok to sandblast plugs to clean them? Yes, but. Depending on the environment they will have to operate in, their service life after sandblasting will be shorter to a lot shorter. Sandblasting puts tiny pits in the porcelain, which become little pockets where conductive material (carbon) can lodge; then, instead of the spark jumping the gap, it just runs down the side of the insulator. The higher the compression, the quicker the plug becomes unserviceable. Dale R. COZY MkIV #1254 ------=____1080527675763_Kan4_IT0dQ Content-Type: text/html; name="reply" Content-Disposition: inline; filename="reply"

> No coolant flow whatsoever, nada, zip

Can't help, Dave, but I can empathize.

Last time I ran the engine it ran pretty well. Since then I've cleaned the fuel filters and changed the oil.

I went to start it today to get some engine tuning done and see how everything works with the cowl on.

Nada, zip. She fired maybe twice in more than a minute of cranking. Switching to computer B, trying different mixture settings etc. etc. didnt help. I took the cowl off & removed the plugs. Black and wet. I sandblasted my spare set and put them in. Same results.

Any ideas?

Is it ok to sandblast plugs to clean them?

John

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