14mm is the most common size for automotive plugs. 18mm is more common for aircraft, but 14mm is common also.
I had 14mm aircraft plugs in my Great plains engine at first. I switched to automotive plugs after a while with the Great Plains converters. I don't know what Revmaster uses, but the GP ones are an aluminum shell that goes over the entire ceramic end of the auto plug and down to the hex on the plug. I didn't have any more radio noise on it than with the aircraft plugs. Steve recommends that if you do have noise that you also run a ground wire from the screw that tightens the shell to the head. If the Revmaster or other brand is just a simple new automotive type rubber end that does not completely shield the ceramic end of the plug then you are a lot more likely to have radio problems. Oh, and one more tip if you buy the GP conversion, get a few extra of the phoenalic insulators with them. They are only a few bucks each and it is nice to have extras since they will crack if you push them on too far which is easy to do the first few times. Brian Kraut Engineering Alternatives, Inc. www.engalt.com -----Original Message----- From: krnet-bounces+brian.kraut=engalt....@mylist.net [mailto:krnet-bounces+brian.kraut=engalt....@mylist.net]On Behalf Of William Zink Sent: Thursday, February 02, 2006 2:53 AM To: KRnet Subject: KR> revmaster spark plugs Just wondering if the revmaster 2100d uses automotive spark plugs. I spoke with Joe at revmaster and he said that they were 14mm so I am assuming this is an automotive plug since aircraft plugs aren't sized in metrics. Is 14mm a standard size plug? Bill Zink Columbus, OH _______________________________________ Search the KRnet Archives at http://www.maddyhome.com/krsrch/index.jsp to UNsubscribe from KRnet, send a message to krnet-le...@mylist.net please see other KRnet info at http://www.krnet.org/info.html
