1wonton Posted January 9 Share Posted January 9 Can someone tell how to determine if this Eismann dual switch is working? Link to comment Share on other sites More sharing options...
nearchoclatetown Posted January 9 Share Posted January 9 Use an ohm meter. Link to comment Share on other sites More sharing options...
1wonton Posted January 10 Author Share Posted January 10 1 minute ago, nearchoclatetown said: Use an ohm meter. OK..............What I am asking is which terminals should I check, what should the values be Link to comment Share on other sites More sharing options...
TerryB Posted January 10 Share Posted January 10 Link to comment Share on other sites More sharing options...
TerryB Posted January 10 Share Posted January 10 Wouldn’t you need the key to unlock the switch to allow measurements to be taken. I would think the key locks out the start function of the switch. Usually the magneto system has an option for battery start so I assume the left and right start arrows select battery starting or magneto starting. Link to comment Share on other sites More sharing options...
TerryB Posted January 10 Share Posted January 10 Found this, maybe it will help. Has a manual and pics for the magneto. Some pics below. https://oldcroak.com/em-dual/ 1 Link to comment Share on other sites More sharing options...
1wonton Posted January 10 Author Share Posted January 10 12 hours ago, TerryB said: Found this, maybe it will help. Has a manual and pics for the magneto. Some pics below. https://oldcroak.com/em-dual/ Thanks Terry, this is very helpful in tracking down the problems I'm having with the system. I'll keep you updated. 1 Link to comment Share on other sites More sharing options...
1wonton Posted January 10 Author Share Posted January 10 Would anyone have the manual for the Eisemann GR4 dual magneto? Looking for how to set the points. ron Link to comment Share on other sites More sharing options...
edinmass Posted January 10 Share Posted January 10 (edited) 8 minutes ago, 1wonton said: Would anyone have the manual for the Eisemann GR4 dual magneto? Looking for how to set the points. ron Did you check Old Croak? https://oldcroak.com/gr4-ed-2-magneto-parts-service-manual/ Shows in detail entire system, including switch. Edited January 10 by edinmass (see edit history) 1 Link to comment Share on other sites More sharing options...
1wonton Posted January 10 Author Share Posted January 10 Yes, I did see this, but it does not address my question. The dual spark Eisemann has two sets of points: one set for the mag and one set for the battery ignition. I am unclear as to how the two sets of points are set. Link to comment Share on other sites More sharing options...
1wonton Posted January 10 Author Share Posted January 10 2 hours ago, edinmass said: Did you check Old Croak? https://oldcroak.com/gr4-ed-2-magneto-parts-service-manual/ Shows in detail entire system, including switch. I understand the system, however the mag referenced is an EM6, the mag in my system is the GR4. Adjusting one set of points affects the other set, but I don't know the sequence of this adjustment. Link to comment Share on other sites More sharing options...
John E. Guitar Posted January 11 Share Posted January 11 (edited) 15 hours ago, 1wonton said: Are you wanting to test the points on the coil/switch or the two sets of points on the magneto? The easiest way to test the points on the switch would be to wire it up on a bench with a 6 volt battery. The setup gives 3 ways to start the engine. 1 - The outer lever set to Magneto, the engine will run on magneto. The engine can be started with the hand crank (provided you can crank it fast enough to generate a decent spark). 2 - The outer lever set to Battery, the engine will run using the dash-mounted coil/switch and the distributor in the magneto. The engine can be started with the hand crank. 3 - The outer lever set to Battery and the START lever rotated back and forth. This will make the coil/switch vibrate like a Model T coil, providing a "shower of sparks". As long as the cylinder is on compression and a good fuel/air mixture the engine will start automatically. This is similar to a "free start" on a Model T. EdInMass's Old Croak link shows the GR4. Looking at page 5 terminals + to R or M are the primary winding (depending on ratchet position) and M & H are the secondary winding (both provided the outer lever is set to Battery). I pulled apart the switch on my Bosch Dual Ignition and it looks very similar other than it uses a built-in vibrator for self starting rather than having to manually rotate the lever back and forth. I put some photos of the setup here: https://forums.aaca.org/topic/384515-bosch-duplex-ignition/#comment-2424080 Edited January 11 by John E. Guitar (see edit history) Link to comment Share on other sites More sharing options...
1wonton Posted January 18 Author Share Posted January 18 Without un-soldering and taking the entire switch apart it appears that either the coil or the condenser is open. Can anyone recommend a rebuilder for the switch (Eisemann dual switch)? I've contacted Marks and Adrian but neither can do the job right now. Surely there are other experienced rebuilders somewhere.... Link to comment Share on other sites More sharing options...
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