---------------------------------------------------------- M14PEngines-List Digest Archive --- Total Messages Posted Fri 03/16/07: 1 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 06:59 AM - Re: Adjusting rotor position on M9-35 mags (John Nafziger) ________________________________ Message 1 _____________________________________ Time: 06:59:10 AM PST US From: John Nafziger Subject: M14PEngines-List: Re: Adjusting rotor position on M9-35 mags Groups, I wanted to share what Ive learned with these M9-35 mags. Please note these differ from the M9F mags that are typically on the M14P, so the timing procedure is slightly modified from what Dennis summarized in the prior email to the Yak list. Many thanks to Dennis and George Coy for the help! George shared an excellent write up on Russian magnetos. If anyone would like a copy, please email me and Ill pass along to save George the headache. I summarized Georges emails below: The M9-35 has mechanical advance mechanism in the magneto. The angle stamped on the magneto cover is the amount of advance angle (usually 30 to 35 deg). This is the amount the rotor will advance when the shaft rotates above a certain RPM (I believe it is 600 RPM). The rotor moves according to speed. It must LAG the #4 point at idle and will LEAD as it advances 35 deg. If you put the rotor at the # 4 pin at static then when it advances 35 degrees when running, it will fire the # 6 plug! There are only 40 deg between each spark plug electrode (360 deg / 9 = 40 deg). I am not sure the proper angle, but suspect you need to split the difference. More Lag on the idle would put the finger closer to the previous cylinder. As long as the right mag is not used for starting and is off during start I do not see why it could not be set up with more lag at static so that the finger could be closer to the pin at the 35 deg advance point. Of course then someone could exchange mags without realizing the implications. It's here! Your new message! Get new email alerts with the free Yahoo! Toolbar. http://tools.search.yahoo.com/toolbar/features/mail/ ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message m14pengines-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/M14PEngines-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/m14pengines-list Browse Digests http://www.matronics.com/digest/m14pengines-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.