MSD = my spark disappeared. They can be fragile. I was told connecting +/- in the wrong order could fry the old ones.
THIS IS THE BEST ! ! ! I almost spit my coffee out my f-in nose !
M.S.D. = MY SPARK DISAPPEARED .... Hey Sturat , I love your sense of humor.
Since, I'm a " story teller " ... and yes have been called many other things too ! , I may as well add what my investigation revealed , when the MSD went bad last summer in my Trinity . ( aka Jetskicrazy's old Trinity )
Last summer my son was beating on my speedmachine, jumping some boat wakes while his GF was cruising on my B1 11-hundo. I want to add we are not accusing my #1 of breaking my shat, I had jumped a couple wakes, with the ski myself. Anyway's that was all it took ! a 2 foot high wake and a small amount of air time , the "My Spark Disappeared" ignition took a dump and that was all she wrote ! I didn't realize at the time that the unit's dont like being " shocked " . I called Holley, and just so happened to get the MSD Tech Support guy who was the " Program Manager " for these 2 cycle ignitions way back in the 90's when they launched the program. He admitted in not so many word's that the potted units can't take a violent vibration, intense shock from some of the extreme conditions that user's will put the products through. It was just bad luck for ME, That ski primarily is my cruiser, it's a bouy ski ( which is extreme use ) and it was just our dumb luck that my son gave the UNIT it's final blow.
Tech support was pretty good IMO, I ended up bullpoopting with this guy for quite a while , talking about old school shat ! MSD never continued to support the program because the consumer market simply wasn't large enough to warrant the program. Manu costs - VS - Demand just wasn't there. I'm assuming all support dropped as soon as Holley bought the business. Regardless , MSD was getting out of the 2 cycle racing ignitions anyway's , or so I was led to believe.
I wish I could find some electrical guru to reverse engineer or help me trouble shoot this old " Box " I have , heck it's not that old, the ski is a 2018 and it looked like jetskicrazy bought this ignition brand new & built it from scratch. Heck Now I have a bunch of coils, a Nice $600 aluminum flywheel , soleniod, cables & boots ... just sitting in a cabinet.
Since my investigation as to what to replace the MSD with in my 1100 Kawi , resulted in a going back to OEM and running a little advanced ! I asked some prominent motor builders in the BIZ and both of them didn't have much luck with other systems. They both recommended going back to OEM also. At least in my situation. There are some nice ignitions out there like Haltronics & Microsquirt but they are Pricey ! Plus neither of the builders I chatted with " off the record " had any luck with getting the Zeeltronics to run like they wanted.
My .02