---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Sun 12/27/20: 1 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 04:25 AM - Re: Magnetos (racerjerry) ________________________________ Message 1 _____________________________________ Time: 04:25:15 AM PST US Subject: AeroElectric-List: Re: Magnetos From: "racerjerry" Efraim, I hear your frustration. Once upon a time, when an elusive ignition problem was plaguing me, I got pissed and made a spark test fixture out of a section of aluminum angle material with (6) 18mm tapped holes to which (4) old spare spark plugs were installed. Magneto leads were temporarily removed from upper spark plugs and installed on the test fixture spark plugs. The aluminum angle & plugs were grounded to the engine and situated where I could easily observe sparks with the business end of the plugs pointing directly at me. Remember that you are only going to see a spark if it comes from a magneto that has an impulse coupling. As was said, you only need three things for combustion: FUEL / COMPRESSION / IGNITION. On old cars, it was easy to check for as fuel problem with a squirt of starting ether down the carb. I don't recommend that unless extreme frustration sets in. Just prime the heck out of the carburetor and if you can smell fuel, you can assume fuel supply is good. ALSO, since this is an experimental airplane, you may be using a non-standard ignition switch(s). "ON" in a normal switch usually means continuity across the switch, which would ground out the magnetos, disabling them. I suggest, for test purposes, temporarily remove the magneto grounding leads. BE CAREFUL - ASSUME THE ENGINE WILL FIRE UP AT FULL POWER. Make sure the tail is SECURELY tied down and that you can easily shut down the engine by turning off fuel supply. CHOCKS are USELESS here. Hope this helps. Jerry King -------- Jerry King Read this topic online here: http://forums.matronics.com/viewtopic.php?p=499829#499829 ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message aeroelectric-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/AeroElectric-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/aeroelectric-list Browse Digests http://www.matronics.com/digest/aeroelectric-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.