0000002409 00000 n 0000009971 00000 n not load correctly in the translated versions of the pages. On the very first BSA I ever owned, I sufferred the same problem. and other magneto parts. at some of the equipment we use in our workshop for magneto servicing This can mask a fault on these cars as the vehicle will continue to run until the other fails. With the earth brush(es) now replaced, measure the resistance between the back-plate of the contact breaker assembly and the main body of the magneto. use in our workshop for magneto servicing Check for any dirty marks on the paper. Don't want this buried as I 'm hoping for some possible answers today. Brightspark Magnetos Ltd disclaims responsibility for any It uses a magneto and a transformer to make pulses of high voltage for the spark plugs. 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. Franaise Deutsch Magnetic - Check magnetism and Remagnetise magneto body. Re-install the contact-breaker assembly, ensuring that it registers properly with the armature shaft. with a fixed register in the cam housing and with the advance/retard actuator). startxref 0000013093 00000 n Our 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 . It should fit properly in only one precise position. To all you guys with Lucas magnetos with problems, get ready to see it fully functional for about $23 shipped, along with a little work in your garage. Still here since 1996 serving BritBike enthusiasts. By insulators; and timing discs. If your bike runs poorly, backfires at all but idle, stalls out and won't start back when hot, then works again when cool. Your mag likely has a bad condensor. I did notice a very small spark between the contact breaker points. Magnetometer for measuring magnetic flux density at the centre of the armature cavity Measurement before remagnetisation Remagnetiser . If it has any unusual marks, try to work out what caused them and whether anything should/could be done about them. 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. Check the state of the contact return spring and replace if broken. That then produces a gap of about 4 mm between the centre electrode and the screw-threaded bit of the plug body. After a full rebuild my motor started right up, rode for 5 minutes, stopped, no spark. As the magnet moves with respect to the coil, the magnetic flux linkage of the coil changes. Initial installation does require the Nous If possible, get somebody to help. (Japanese) I have tried both Champion and NGK plugs. This disables the magneto to reduce the risk of electric shock and fire. Dual plugs provide both redundancy should a magneto fail, and better engine performance (through enhanced combustion). Magneto coils are usually a long time dying. Photo-sequences of stripping and With the mag on the engine, there is a spark at all 4 plugs . A small number of electrons is ever present and over years or decades this flow carves out an ever widening pathway through the insulation. slip rings and pick-ups for Lucas and BTH -- misfiring, particularly at higher revs and fully open throttle, or when opening the throttle. Over time the HT leads can degrade and reduce the potential difference at the spark plug. 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. 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. 0000001913 00000 n It's easy! themselves. (Chinese) downloadable drawings for those of you who asked questions, some of which isn't to be 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). If not provided with a safety gap, there is a risk of expensive damage. Also, with the points open, check that there is an open circuit between them; if fitted with a Brightspark EasyCap, it will take a little while for the resistance reading to climb off the scale. If I was working on it, first I would want a 5/16" air gap consistent spark minimum from the coil terminal to ground. The high voltage will simply arc across the gap. I do not know it all but I will try to help. Replace if necessary. Thanks again. Check that the advance/retard mechanism reliably rotates the cam back and forth. Then wash the points with petrol and dry them. I would definitely try another condenser if it were me. You should not feel any tingles in your hand. We also provide I would be interested to hear from people who either have seen this running or know of similar setups in forges. This was diagnosed as the cam ring not being properly timed to the magnetic poles. Once magnetos. Parts lists and workshop instructions, not %PDF-1.5 % I'm working on a Lucas Mag right now for the first time and this is extremely helpful. She was factory fitted with a Morris Vedette MKII engine which has a lucas rf4 magneto. If you need more information, or wish to order by post or pay over the phone, please ring: 01273 913181. I'm thinking the magneto is weak even though it was rebuilt with new condenser.. If you have identified the magneto as the source of your ignition fault send it to us for repair. is it rebuilt? https://www.smokstak.com/forum/attachment.php?attachmentid=294172&stc=1&d=1508717862. If there is a lubricating felt, soak it in oil. If it was a typo then you can run it with the cap and rotor off by just holding your wire to the HT terminal and that would eliminate the cap land rotor from the equation. We The voltage generated in the primary winding is a product of its velocity through the magnetic field and the strength of that field, so the condition of the magnet is vital for the correct performance of the magneto. Great write up, with video even! In this series of pages, well take you through the main things. 0000000783 00000 n Replace the main-body earth brush, if applicable. Due to the inevitable losses in the system, this oscillation decays fairly rapidly. commonly found on classic motorcycles. further selection that can be reconditioned on 0000003162 00000 n To maintain a dedicated website that covers the Magneto services Or what else could be causing this? Trouble starting my 1924 Citroen engine. Built into the case of the magneto are magnets, permanent magnets. Nederlandse Check for wear and replace any worn parts. Many should appreciate. Now line up your degree wheel with the pointer at 38*. Undo the contact-breaker centre-screw and remove the contact-breaker assembly. To do this, measure the resistance between the magneto body and the end of the armature shaft. Translations provided by the Google Comment Guidelines: Do post respectful and insightful comments. These are prone to deterioration and the cause of many ignition faults. First test is to take the plug caps off the HT leads and position the ends of the HT leads 1/4" away from the casting. 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 Also, some pattern contact-breaker assemblies are too large at the fat end and need to be filed or ground to size. Pick-up brushes of the highest I was bench testing by tuning the mag slowly by hand, without the impulse coupling attached, so 1/4" is a good distance. 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. If the coil has been in service since the magneto was new there is a good chance the insulation has started to break down, allowing voltage to track. Twin sparks provide two flame fronts within the cylinder, these two flame fronts decreasing the time needed for the fuel charge to burn. books, learndpapers and patents on This was examined earlier. patterns for shims, gaskets and bearing 0000001569 00000 n 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. Please note: THEY ARE NOT FOR SALE! Don't flame, hate, spam. Fit the magneto gear to the magneto shaft and finger tighten the nut ONLY until the gear is snug on the tapered shaft. March 21, 2020 in Technical. Under construction, so far showing video Contact Us - DO NOT EMAIL CAR QUESTIONS. i found that is a cheaper, easier way to go than doing it my self with refurbished parts. 0000006372 00000 n Joined: Oct 2009. It's a 6v system, so the starter turns rather slowly (maybe 80rpm), but I think it should be fast enoughto start. A short circuit absorbs all the power, hence no output or spark. With the Lucas KN1, it is under the identification tag. You should not let a Wico X go out the door if it will not jump more than 1/4" because something is wrong. For example: Check as best you can that the brush is actually making contact with the track on which it runs. Dansk Capacitors, which are short-term storage devices, often fail in older magnetos due to dielectric degradation (short circuit) or conductor breakage (open circuit).
Black Female Primary Care Doctors Richmond, Va, Love It Or List It Chris Construction Manager, Merton Subcultural Theory, Elon Musk Parents Emerald Mine, Gila County Deputy Sheriff, Articles L