 Setting New Standards |
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 As the population of E-MAG products continues to grow and our knowledge base expands, we will periodically offer supplemental operating notes and service bulletins. This web page will attempt to serve as a library of such communications beginning in 2007.
Note on battery chargers: Some styles of ground (110 volt) chargers will hammer the battery with charge pulses as part of their normal cycle. Such hammering is not a typical buss state and can cause problems for the ignition if it is powered ON during such a charge. So as a normal guideline, KEEP IGNITIONS POWERED OFF WHILE (GROUND) CHARGING. Service Bulletin 9/12/2008 [click to load Service Bulletin .pdf] In our 113 and 114 series ignitions, engine position is transmitted to the ignition by way of a small sensor magnet mounted on the back end of the ignition shaft. Beginning Aug. 07, the system for mounting the magnet was revised. The magnet is first soldered into a cup that is then double set screwed to the shaft. Initially, this system performed well (for a year). However, after a period of operation, we are starting to see instances where the sensor mount has worked loose, causing the ignition to lose its timing reference. The correction involves 1) replacing the sensor mount with a lighter one (now only 4 grams), 2) adding a key way to the shaft and the sensor mount, and 3) drilling and roll-pinning the assembly in place. Arguably, either step 2 or step 3 would adequately resolve the problem, but in this case our intention is to "overdo". As with all such updates, we offer the sensor update free of charge. We only ask that customers pay the cost of return shipping ($25 flat fee for US customers). Note: Some customers have expressed concerns relative to the treatment we outline above, and suggested making the design details public. By doing so, we'd benefit from the feedback, and perhaps lessen some of the mystery. We think this is an excellent suggestion. Details on the sensor mount can be accessed thru the following link [SBDet]. We submitted the sensor mount to an (AE) engineer for review. He said the procedure we outlined is more than adequate, and that the smaller mount with roll-pin (alone) would be sufficient. The engineer has many years of experience in the aircraft piston engine design business. Update 10/6/08: Ongoing analysis has verified the roll-pin (alone) is more than adequate for the job and the keyway does not meaningfully improve margins. Accordingly, the Service Bulletin protocol was revised on 10/4/08 to eliminate the keyway shaft (step 2 above). |
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