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#1
08-16-2011, 01:47 AM
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582 special w/miss fire
I happen to have a 582 speical with a twin cylinder 16 hp Briggs and Scrapem motor in it. ( I know silly me) The other day I went to fire it up to mow the grass and it was only fireing on one cylinder.
Seems the left cylinder(as seen from the seat) spark plug died. SO! I pull the plug, and hop on the rice grinder and head to town for a couple of new plugs. Get back home, install new plugs in both cylinders, so far so good. Twist the key and it fires up only to run on the left cylinder and no fire on the right cylinder. Old spark plug is a Champion CJ12C new replacement spark plug is a Champion CJ12YC Put old plug back in and it now fires on both cylinders. Whats up? I did find the problem but only after a few choice words tossed in the direction of the counter man at the hardwear store where I purchased the plugs. Anyone care to guess what the problem was? 
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#2
08-16-2011, 04:57 AM
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Lonny
I have a command 18 that would do that. Basicly when it was idling or not much over idle it would fire fine, using spark testers. When I would run it half to full throtal, it would stop firing. I changed the plugs, no differance. Changed the coils, running fine still today. Maybe something in the coil. If I remember right, it has a coil like the 682 and 782 one coil with 2 leads. If this is right maybe your lead is shorting out.
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#4
08-16-2011, 07:33 AM
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I have also seen a coiil be bad out of the box. Fortunately, I was swapping it out with a mechanic standing there in the Jxxx Dxxxx service bay or they would have never believed me.
__________________
Cub 108 Cub 1650 Cub 1000 Cub 682 Super Cub 2072
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#5
08-16-2011, 09:28 AM
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Champion was the problem. Take those junk plugs out and go buy some Autolites for it.
__________________
2013 cub cadet GTX 2100 w/IH weights 1984 cub cadet 1282 w/#2 cart, plow, IH weights 1970 IH cub cadet 73 w/fenders Haban 402d sickle bar 1966 IH cub cadet 102x2 1966 IH cub cadet 71 pull start w/Fenders IH sweeper, Brinly Gard N Cart 1965 IH cub cadet 100 w/Fenders hydro lift Brinly Gard N Cart, 3 point sleeve hitch Brinly plow sleeve hitch blade #1 cart 1965 IH cub cadet 70 w/fenders and snow plow 1961 IH Cub Cadet Original #3646 w/fenders 3 point, IH rear blade, non trip snow plow
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#6
08-16-2011, 09:46 AM
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Quote:
__________________
DWayne 1973: 128, ag tires, 3pt. lift, spring assist, lights, 42" Deck 10" moldboard plow 2016 XT1 42" deck 18HP
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#7
08-17-2011, 01:11 AM
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Well the problem was simple to solve once I removed the plug.
Seems that the hole for the plug on the right head is closer to the valves than the left head. One of the valves came up and slamed shut the plug gap, = no fire. Apond closer inspection I found the overlaying problem. The electrode on the Champion CJ12YC is not a flush fit, it protrudes out past the end of the threads aprox 1/4 inch, just far enough to get hit by the valve. I doubled checked the left head and all is fine with that plug, so now I have to go find a set of Champion CJ12C plugs and not CJ12YC.
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