Richard Farrant Posted October 4, 2014 Share Posted October 4, 2014 Points gap 10 thou, plug gap 40 thou, timing spot on. Now idling very well. But coil too hot and cuts out after a while and will not re-start. After pouring cold water over the coil it will fire straight up again. I have just gone back on this thread and saw that you have the plug gap at .040". A large plug gap is one cause of a coil overheating and the correct gap for a 28hp on normal points set up is .028" Quote Link to comment Share on other sites More sharing options...
Sean N Posted October 4, 2014 Share Posted October 4, 2014 I have just gone back on this thread and saw that you have the plug gap at .040". A large plug gap is one cause of a coil overheating and the correct gap for a 28hp on normal points set up is .028" Just noticed that as well. Also, I don't have the books handy to check my increasingly dodgy memory, but shouldn't the points be 0.012" to 0.014" ? Quote Link to comment Share on other sites More sharing options...
Richard Farrant Posted October 4, 2014 Share Posted October 4, 2014 Just noticed that as well. Also, I don't have the books handy to check my increasingly dodgy memory, but shouldn't the points be 0.012" to 0.014" ? Hi Sean, Think off hand points are .012". To be fair the plug gap specified in 1940 book was .040" but later on it was reduced to .028" which makes more sense. Quote Link to comment Share on other sites More sharing options...
Sean N Posted October 4, 2014 Share Posted October 4, 2014 Hi Sean,Think off hand points are .012". To be fair the plug gap specified in 1940 book was .040" but later on it was reduced to .028" which makes more sense. Yes, I'd remembered 0.028" to 0.030" - GM seem to like vague clearances! I hadn't come across that 0.040" spec though. Was it on a different / unusual distributor or coil? I seem to remember the 0.012" / 0.028" spec being good for all Bedfords with Lucas ignition, or am I misremembering? Quote Link to comment Share on other sites More sharing options...
unionjack Posted October 4, 2014 Share Posted October 4, 2014 Okay, I had the points at 10 thou and the plugs at 30 thou. After reading the 1944 manual I increased the plugs to 40 thou, (as it says to do), neither setting made any difference. Quote Link to comment Share on other sites More sharing options...
gwrightoy Posted October 27, 2014 Share Posted October 27, 2014 Okay, I had the points at 10 thou and the plugs at 30 thou. After reading the 1944 manual I increased the plugs to 40 thou, (as it says to do), neither setting made any difference. Hi again did you get to the bottom of the problem yet? Quote Link to comment Share on other sites More sharing options...
unionjack Posted October 28, 2014 Share Posted October 28, 2014 Hello, Not had chance to give it a road run yet sorry. It starts immediately now and runs well. Coil feels hot to me though. Before I dare drive it I'm going to fix a second coil alongside the existing one so I can just swap the wires across if it conks out on me. Quote Link to comment Share on other sites More sharing options...
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