From: | Steve Carr | e-mail: | stevecarr1956-A-yahoo.com |
Subject: | RE: RE: RE: RE: RE: RE: RE: RE: RE: RE: magneto | Date: | Fri Aug 4 09:13:51 2017 |
Response to: | 22187 |
How do we "Hummer" owners ('56 B engine) get away without having a coil? Would adding one make our bikes run better? ----- ORIGINAL MESSAGE FOLLOWS ----- only that the poles are N-S-N-S, so the guy would need a recharger that has 4 poles on it. I would start with the rotor. I'm 99% sure that the coil will still be good ----- ORIGINAL MESSAGE FOLLOWS ----- What you describe about operation at 28 or less is how the bike is running. Bump start only and rough running. I think that wraps it up. I will have the rotor re- magnetized and replace the ignition coil. Every other part of the system has already been replaced. One more thing. Is there anything the tractor mag guy needs to know when re-magnetizing like polarity or??? Thanks for your input. ----- ORIGINAL MESSAGE FOLLOWS ----- only if ya got a AC battery ----- ORIGINAL MESSAGE FOLLOWS ----- "What else would ya like to know about the Bendix magneto?" Can it charge an accessory battery to keep the lights from dimming at stops? ----- ORIGINAL MESSAGE FOLLOWS ----- Your research on "highly unusual for a rotor to be the issue" is wrong. I have seen quite a few rotors that would not start or run a motor. Even if ya use the electric starter. What you need to find is called a magnometer or gaussmeter. I have one. A good rotor, that makes a good spark, measures 35 on my meter. 25 or less will not run a motor at all. 28 and it's hard to start What else would ya like to know about the Bendix magneto? ----- ORIGINAL MESSAGE FOLLOWS ----- Does any one have a way to measure the magnetic force required for the mag rotor? I have the rotor pulled and it will pick up maybe 1 pound of a metal object. Also I found a guy who is into antique tractors who may be able to re-energize the rotor as all of the old tractors used a magneto. He thought the rotor should be able to pick up 10 pounds. Should have some good answers to the mag issues when I am done. Thanks ----- ORIGINAL MESSAGE FOLLOWS ----- It's official. The lighting coil in place of the ignition coil will produce a weak intermittent spark at 1/8" (under specs). Trying the ignition coil again I get nothing. I am going to replace the ignition coil and re-magnetize the mag rotor when I find the guy. There is nothing left to replace so it has got to work. Thanks for the help. ----- ORIGINAL MESSAGE FOLLOWS ----- Thanks for the info. All my research says it is highly unusual for the magnet to be the issue. The coil is $90 so I hate to get it if it is not the cause. The bike also has a lighting coil which someone said is the same as the ignition coil even though the part numbers are different. Tomorrow I am going to try the lighting coil in place of the ignition coil and see if that works. One other thing I am looking into is that in rural Minnesota (where I live)there are a lot of antique tractors with magnetos. I have a line on a couple of local guys who could maybe do the re-magnetizing. I will know in a week as next weekend there is a huge antique tractor show in Hastings, Mn. where I live. Thanks for your input. I would still like to know your XLCH connection info. I will let you know how my trials are doing. Funny connection. I am restoring this bike because it is the same year and model as my first bike I got as a Christmas present when I was 14. My best buddy had a 1962 Harley Sprint. We had great times and I spent many hours on the Sprint. ----- ORIGINAL MESSAGE FOLLOWS ----- I dug through my old parts and found a NOS rotor - but it's a 29707-63R. The Hummers didn't use 297xx parts, so I think this fits a Sprint. No help. I would suspect the coil before the rotor. The coils in these mags were known to be the weak link. If I remember correctly, these magnetos were produced by Bendix-Scintilla, who made aircraft magnetos, but also sold flywheel mags for small equipment (snowblowers, rototillers, etc) during the 1950s and 1960s. I've contacted a company who re-magnetized my XLCH rotors. They're not familiar with Hummers, so they're going to do a little research and call me back. Dave ----- ORIGINAL MESSAGE FOLLOWS ----- 62 Scatt getting closer but still a few issues. Magneto does not appear to have sufficient magnetic force to create the required 6 volts. Checked the ignition coil and it passed but it could still be bad. Bike runs with a 6 volt battery bypassing the magneto entirely. Not having any luck so far finding a place to re-energize the magnet but I know it is done. After that if there is still an issue it could only be the ignition coil. I already replaced the spark coil, plug, plug wire and points. Any ideas where to send the magneto for testing and repair. I live in Minnesota but don't mind shipping it somewhere. |
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