If you are having trouble with your ignition system we recommend that you first change your spark plugs and HT leads. 85 0 obj<>stream 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. Remove two nuts and funny-looking-long-thing that attaches the mag to the engine Check the plug-wires at the end that goes into the mag .and remove sparkplug-cap and make sure you have a good connection (maybe you'll want to cut of a bit and re-atttach) Remove the two high-tension pick-ups from the mag Having removed the contact-breaker assembly from the magneto, disassemble it, noting where each part was. Nederlandse This causes the electromagnetic field in the primary coil to collapse rapidly. 0000001184 00000 n If higher than that, investigate. Rotate the armature and check that the contact- breaker spring never touches the cam. Our i totally agree. (Chinese) troubleshooting your magneto. LUCAS Magneto check "How To" - Jockey Journal Forum Check the condition of the HT lead(s) and plug-cap(s) and replace where necessary. Then wash the points with petrol and dry them. unfortunately the repair did not work as the Coil did not work so it had to be sent to rewinding. -- Tickover, pulling away, and low-speed running erratic. We also have kits for more unusual magnetos, such as the BTH, ML, Magnetos France, Morel, Lucas wader, Lucas KVF, etc., and for cars. This is really common on original units as the Lucas condensers were made from wax paper and foil. The plugs all light when loosened, but not when installed. Nederlandse not load correctly in the translated versions of the pages. Come join the discussion about performance, restorations, modifications, classifieds, troubleshooting, maintenance, and more! It uses a magneto and a transformer to make pulses of high voltage for the spark plugs.The older term "high-tension" means "high-voltage".Used on many cars in the early 20th century, ignition magnetos were largely replaced by induction coil . A forum community dedicated to Jockey motorcycle owners and enthusiasts. [6], The first car to use magneto ignition was the 1901 German Mercedes 35 hp racing car, followed by various cars produced by Benz, Mors, Turcat-Mery, and Nesseldorf. After 1 hour or so the bike can be started again, but the ignition fails again after riding about 20 miles - not a pleasent way to ride! We will check all the parts of the magneto for faults and will provide a firm quotation for a repair along with a description of the magneto repair required. Measure the resistance with the two probes of your multi-meter shorted together. As the points begin to open, point spacing is initially such that the voltage across the primary coil would arc across the points. The gap will widen as the wire ends melt further apart and soon the adjacent turns will be affected so the coil will eventually fail. The plugs are non resistor, gaped at -025", and are new. Franaise Deutsch If the reading is less than 3000 ohms, it would be unusual, but is indicative of a problem. Thank you for your patience. Electrical - Armature windings, Condenser, Slip ring, Points and Bushes. Built into the case of the magneto are magnets, permanent magnets. Are suppressors and resistor sparking plugs OK to use with magnetos? Wico-XH Magneto Won't Spark | Smokstak Antique Engine Community If it is significantly higher, there is a bad connection or break in the low-tension circuit, in which case the magneto will need a more complete overhaul. We provide yourselves. Another problem, due to constant hot, cold, expansion, contraction, vibration or mechanical impact, is breakage of the fine winding wire. If your multimeter can measure capacitance, the reading should be within 10% of: 150 nF (0.15 uF) for the C01, C02, C03, C05 and CU/150 EasyCaps; 220 nF (0.22 uF) for the C06, C07 and CU/220 EasyCaps. found in all rotating-coil magnetos. I also needed a new coil for it which I installed, cleaned the mag up and replaced any bits it needed. Lucas Magneto 1930 - 1940. The other plug cap should give a reading that is infinite (OL) or extremely high. Coil may still function somewhat and not completely failed but ratio of turns lost because of insulation breakdown. It's a 6v system, so the starter turns rather slowly (maybe 80rpm), but I think it should be fast enoughto start. BTH mags utilized condensers made from mica. detailed instructions in our 'condensectomy' After 20 miles the ignition is down to zero. PDF LUCAS MAGNETOS - edknet.de item. With the mag on the engine, there is a spark at all 4 plugs . Voltage across the primary coil results in a proportional voltage being induced across the secondary winding of the coil. Also, some pattern contact-breaker assemblies are too large at the fat end and need to be filed or ground to size. with a fixed register in the cam housing and with the advance/retard actuator). Without suppressor: suppressor: Percentage difference with suppressor: Peak HT voltage to initiate spark: 9600 V: 10600 V at magneto: 10.4 %: 9300 V at spark gap-3.1 %: DC component of HT current immediately after striking spark: 53 mA: 52 mA-1.8 % You need to confirm that the condenser has failed AND that replacing it will solve the problem. As the voltage of the primary winding rises to several hundred volts,[3][4] the voltage on the secondary winding rises to several tens of thousands of volts, since the secondary winding typically has 100 times as many turns as the primary winding.[3]. As the size of the combustion chamber determines the time to burn the fuel charge, dual ignition was especially important for the large-bore aircraft engines around World War II where it was necessary to combust the entire fuel mixture in a shorter time than a single plug could provide, in order to build peak cylinder pressure at the rpm desired. Oil on the inside of the pick-up is usually indicative of a failure of the magnetos oil seal, in which case the magneto will need a more complete overhaul.
lucas magneto not sparking
lucas magneto not sparking