Another problem, due to constant hot, cold, expansion, contraction, vibration or mechanical impact, is breakage of the fine winding wire. The Lucas magdyno and magneto units fitted to all AMC machines after 1939 had Nifal magnets which are not demagnetised by removal of the armature. However, provided the reading is more than about 500 ohms, it is probably OK. To do this, measure the resistance between the magneto body and the end of the armature shaft. Just to reinforce a point here of something very well done that you did in the how-to: when you're testing a mag like this, ALWAYS have the plug wires hooked up with a gap (or plugs) to ground so that energy has somewhere to go. To have the discharge go arc back into the coil itself or the mag housing causes some serious damage. classic vehicles generally. Copyright 2023, Antique Automobile Club of America. Brightspark Magnetos - Home Tri-Spark Ignitions; Pazon Ignitions; Lucas Rita; AGM Batteries For Classics; Lucas Alternators; Rectifiers & Voltage Control; Dynamo Parts; Magneto Parts; Lucas SR Magneto Spares; HT Coils For Classic Bikes; British Bike Points & Condensers; . 096792012013 - 2020 | Website design by The Net Effect of Sheffield, Website design by The Net Effect of Sheffield. If the pick-up is retained by spring clip, swing it to one side while holding the pick-up in place. This video details the work done to the magneto so far. Nederlandse Contact Us - DO NOT EMAIL CAR QUESTIONS. A small number of electrons is ever present and over years or decades this flow carves out an ever widening pathway through the insulation. "A Community of Antique Engine Enthusiasts." Are suppressors and resistor sparking plugs OK to use with magnetos? Magneto: No Spark - Antique Automobile Club of America I'm working on a Lucas Mag right now for the first time and this is extremely helpful. It should fit properly in only one precise position. Gift Article. We also have kits for more unusual magnetos, such as the BTH, ML, Magnetos France, Morel, Lucas wader, Lucas KVF, etc., and for cars. The reading should be substantially the same as the reading you obtained in the internal HT continuity section. Posts: 34. JRC Engineering Inc. 3110 Indian Ave Unit 1E, Perris, CA, 92571. Check for any dirty marks on the paper. Clean and grease the moving-point pivot. Having set the timing with the points opening on one cam lobe, you should check that it is also correct with the points opening on the other cam lobe. In more modern times, insulation materials have improved to the point where constructing self-contained magnetos is relatively easy, but energy transfer systems are still used where the ultimate in reliability is required such as in aviation engines. The result in high resistance will reduce the current flow in the primary winding and reduce the magnetic flux which adversely effects the secondary winding output voltage. If you are having trouble with your ignition system we recommend that you first change your spark plugs and HT leads. instruments available for immediate use, and a There are several common faults with magnetos The Capacitor Capacitors, which are short-term storage devices, often fail in older magnetos due to dielectric degradation (short circuit) or conductor breakage (open circuit). With the mag on the engine, there is a spark at all 4 plugs . Electrical - Armature windings, Condenser, Slip ring, Points and Bushes. This induces an EMF in the coil, which in turn causes a current to flow. If it is several thousand ohms, it indicates that the HT lead is resistive and/or the plug cap is fitted with a suppressor resistor. Fit the magneto gear to the magneto shaft and finger tighten the nut ONLY until the gear is snug on the tapered shaft. Trouble starting my 1924 Citroen engine. Problems rooted in the magneto are sometimes obvious, or can seem like all sorts of other things. There is no wire hooked up to the cap. use in our workshop for magneto servicing We provide Lucas SR2 Magneto - Hitchcocks Forum I can guarantee every British motorcycle powered by a magneto i either not delivering maximum spark and/or is on the verge of failing if the original Lucas capacitor has not been replaced.

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