lucas magneto not sparking

0000013093 00000 n On the very first BSA I ever owned, I sufferred the same problem. Put 2 hours of flawless time on the bench. specially-selected, top-quality, British-made 0000005952 00000 n magnetos. You can check the latter by removing the pick-up(s), rotating the armature in the proper direction until the points are just opening, and checking that the brass is visible directly underneath the pick-up hole (or one of the pick-up holes) in the magneto body. Can you rig up real cables? 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. Coil may still function somewhat and not completely failed but ratio of turns lost because of insulation breakdown. Lucas workshop instructions - magnetos Measure the resistance between the magneto body and terminal in the plug cap. I also want to wire up the battery better, as I'm just using jumper cables. The wires are copper core with non resistor caps. 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. Check that the felt pad in the end of the screw holding together the two blocks of the points assembly is present and good, and soak it in oil. In the right direction (clockwise, looking at the points) and a fairly healthy looking spark should jump the gap from one ht at a time, lead to casing. Reassemble and check operation. The reading will probably be a fraction of an ohm. Parts lists and workshop instructions, not This disables the magneto to reduce the risk of electric shock and fire. These were on older equipment which hadcomplete tune upsthat wentto the field and didn't work more than a hand full or two of times and then they would begin to start hard, no start or run for a short time and shut off then not restart. Another cause of atom disorientation is mechanical shock, hammer blows or dropping the unit onto a hard surface, etc. With twin- or multi-cylinder magnetos, and some single-cylinder magnetos, the brass is a segment, rather than a complete ring, and you may need to rotate the armature in order to be able to see it. Others have an earth brush between the main body of the magneto and an earth track of the armature. not load correctly in the translated versions of the pages. books. rebuilt amature runs about 85pnds from independent ignition. -- misfiring, particularly at higher revs and fully open throttle, or when opening the throttle. Capacitors are replaced with ones that have a longer life expectancy and greater reliability. If you havent already done so, undo the contact-breaker centre-screw and remove the contact-breaker assembly. Norsk I purchased this Lister D petrol (gasoline) engine that came on a trolley with an Aerograph air compressor. 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). 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. <]>> It appears that magnetio does not have in impulse coupling which means the engine must turn over much faster to develop as hot a spark as if there was an impulse. This causes the electromagnetic field in the primary coil to collapse rapidly. The original coil may be reusable, although it is susceptible to faults - as described in our section: common problems on magnetos. We would recommend having the transformer coil rewound as modern class F or H wires and insulations are superior to the ones used at the time it was originally made and would almost certainly give you another 40 years of good service. If necessary, dress the points on a fine stone. Svensk Initial installation does require the Not sure what came off, but 1930s/40s I would have thought.prefer collection, but would post. or Excellent "how-to". This allows the spring to unwind giving the rotating magnet a rapid rotation and letting the magneto spin at such a speed to produce a spark. If excessively worn, replace the heel (BTH), or the moving-point assembly (Lucas). dynamos, regulators, alternators and Translations provided by the Google If an earth brush is fitted behind the back-plate, check that the spring is good, that the brush is free to move and that it is not unduly worn in length or diameter. Brightspark Magnetos Ltd disclaims responsibility for any Twin sparks provide two flame fronts within the cylinder, these two flame fronts decreasing the time needed for the fuel charge to burn. The irony here is that usually these magnetos fail to spark. If there is a difference, adjust the points so that it is the smaller gap that is 0.012 (0.3 mm). JavaScript is disabled. If the magneto is fitted with, or about to be fitted with, a Brightspark EasyCap, you can perform some basic checks on the EasyCap. 0000003162 00000 n How to 'Kill' a Lucas KVF Magneto? - Vincent H.R.D. Owners Club Forum "Colonel fair is fair: if I nail Hotlips and punch Hawkeye can I go home too?". Comment Guidelines: Do post respectful and insightful comments. Any suggestions? A short circuit absorbs all the power, hence no output or spark. DIY Magneto Maintenance and Troubleshooting It uses a Bosch ZA4 magneto (rebuilt about 10 years back) which produces a nice blue spark in the plugs when they are out of the engine. MochetVelo If you have a Megger or similar insulation tester, set it to test at 500V. In that case, it it best to dismantle the magneto to retrieve it. If working on your own, holding the end of the HT cable steady 6 mm from the engine is difficult when kicking the starter. Place a clean piece of strong paper between the points, and with the points closed pull the paper out. old-style capacitor (the 'condensectomy') and Click Here to view Lucas face cam (magdyno) parts manual. Regrettably, some Acrobat .pdf files might not If not provided with a safety gap, there is a risk of expensive damage. You can check for this by trying to start in a dark area with no lighting. - there's a lot of stuff in our frequently This was examined earlier. Rotate the armature and check that, when the points are fully open, the moving point assembly is not fouling anything. Replace the main-body earth brush, if applicable. and overhauls. If the resistance is higher than about 15,000 ohms, it indicates a bad connection. Magneto advice - lucas rf4 in vedette engine | YBW Forum Now line up your degree wheel with the pointer at 38*. You are using an out of date browser. quality are also available, of the correct A small number of electrons is ever present and over years or decades this flow carves out an ever widening pathway through the insulation. Lister D Magneto Lucas RS1 full rebuild but still no spark Coil Fail. use in our workshop for magneto servicing This will not stop the coil from working. Thank you for your patience. These are prone to deterioration and the cause of many ignition faults. These faults do not necessarily occur instantaneously, they may develop over time leading to a gradual deterioration of the spark output. 82 23 With Lucas devices, the fixing hole at one end of the contact-breaker spring is slotted so that the effective length of the spring can be adjusted as necessary. (Chinese) Learn how and when to remove this template message, https://en.wikipedia.org/w/index.php?title=Ignition_magneto&oldid=1150712364, Short description is different from Wikidata, Articles with unsourced statements from January 2023, Articles needing additional references from January 2023, All articles needing additional references, Creative Commons Attribution-ShareAlike License 3.0, This page was last edited on 19 April 2023, at 18:38. https://www.smokstak.com/forum/attachment.php?attachmentid=294172&stc=1&d=1508717862. As the magnet moves with respect to the coil, the magnetic flux linkage of the coil changes. We also sell our Brightspark range of You need to be a member in order to leave a comment. (Chinese) I worked on farm equipment for my last real service job from 2013 thru 2016. Lister D Magneto Lucas RS1 full rebuild but still no spark - YouTube However, typical signs of magneto problems are, among others: -- Bike hard to start. LUCAS MAGNETO TROUBLESHOOTING | JRC Engineering, Inc. Great write up, with video even! I have seen several condensers during that time whichwork for the half but will not generate the field collapse andfire the plug . U.S. agrees to $5 million settlement over police killing of Bijan It should fit properly in only one precise position. Remove the pick-up(s) from the magneto taking care not to mislay the gasket(s). Re-install the contact-breaker assembly, ensuring that it registers properly with the armature shaft. JRC Engineering Inc. 3110 Indian Ave Unit 1E, Perris, CA, 92571. i found that is a cheaper, easier way to go than doing it my self with refurbished parts. is it rebuilt? relating to our products, others more general If the brush is missing or there is only a very short piece in the pick-up, the brush (or part of it) may have come out and dropped to the bottom of the magneto housing. i have had 3 done here by ed strain that included rebuild with remagnatized body for a little more than $200.00. The spark is fine on this coil, keep in mind the faster you turn a mag, the better the spark. We shall resume operations as soon as we possibly can. Used on many cars in the early 20th century, ignition magnetos were largely replaced by induction coil ignition systems. If possible, get somebody to help. I think it may be do to condensor failure. 0000001569 00000 n It's easy! The turns ratio between the primary and secondary coil is selected so that the voltage across the secondary reaches a very high value, enough to arc across the gap of the spark plug. but enjoy doing it, with confidence, relying on the Therefore, taking the sparking plug(s) out of the engine, laying them on the cylinder head and checking whether the magneto will produce a spark at kickstart speeds is not a sufficient test. We provide Thanks again. What else could possibly be grounding this? This was diagnosed as the cam ring not being properly timed to the magnetic poles. Mechanical - Bearings, insulation, washers and shimming the armature. Take a look Put it on bike, timed, no spark. . The coils are, of course, designed for this pressure but no insulation is perfect. commonly found on classic motorcycles. The engine needed some attention, which it has now received, but I had to take the magneto off. AJS and Matchless Owners Club Limited | Print Article - Jampot

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