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#1
11-11-2025, 08:36 PM
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1864 keeps running for a while after turning key off
My 1864 keeps running for a while after I turn the key off, slowly loses rpm and finally shuts off. I had already replaced the ignition switch, because it was bad. It also wasn't charging and I found the stator to be bad. I have replaced it and the engine is ready to go back in. Is there anything else I should be checking for the shutdown issue? It really bugs me, since it obviously isn't right.
Thanks
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2 Originals, 100, 105, 125, 1450, 1200, 2 IH 982's, 1211, 1872, 2072, 2-1864's, 1782, a few 42" front blades, 2 Haban 54" blades, Haban sickle mower, BB36, QA-36A, 42" IH rear blade, 42" IH landscape rake, #1 tiller, #40 box blade, 59M shredder, #2 cart, International 3312 push mower, International 250 power washer, 1952 IH refridgerator, 1971 IH 1210 3/4T 4x4 truck   
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#2
11-11-2025, 11:38 PM
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I think you either got dieseling OR your Magento is grounded poorly upon shutoff..
Dieseling is usually from hot spots, usually on carbon buildups, in cylinder that causes ignition besides spark. The hot spots could be cause by lean conditions, poor cooling, etc Etc. When shutting off your engine, the key switch at off grounds the magneto, thus killing spark.
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Two 125's and a 124 all with 42" decks Plow blade #2 Cart QA36 snowthower
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#3
11-12-2025, 01:22 AM
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Mount a toggle switch on the dash and hook it in series with the fuel solenoid on the carb. Turn the switch off and the engine should stop in a few seconds. I did this to mine and it works great. Just remember to turn the switch on before trying to start the engine.
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Richard 1979 IH Cub Cadet 782 w/CH20, dual hydraulics, power steering and Cat 0 three point
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#4
11-12-2025, 08:46 PM
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Billy
No, it isn't dieseling. This is an electrical problem. All of the connections were dirty and oily and I cleaned everything pretty well when I had it apart, including power washing and de-greasing it. I ended up replacing both crank seals, breather hose and gasket, intake and exhaust manifold gaskets, oil pressure switch, stator and a few other small parts, so it was due for some maintenance. Hopefully this issue will be gone when I get it put together tomorrow.
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2 Originals, 100, 105, 125, 1450, 1200, 2 IH 982's, 1211, 1872, 2072, 2-1864's, 1782, a few 42" front blades, 2 Haban 54" blades, Haban sickle mower, BB36, QA-36A, 42" IH rear blade, 42" IH landscape rake, #1 tiller, #40 box blade, 59M shredder, #2 cart, International 3312 push mower, International 250 power washer, 1952 IH refridgerator, 1971 IH 1210 3/4T 4x4 truck
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#5
11-13-2025, 09:53 AM
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Quote:
you have a leaky carb and want to empty the float bowl first. Either way the original problem hasn't been fixed.
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#6
11-13-2025, 03:47 PM
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The Kohler CH18 in the 1864 does have a fuel shutoff in the carb. I like to idle my some before I shut it off and if the engine is hot, it will diesel when you turn off the key because there is still some fuel available. I kill the fuel solenoid, and the engine will continue to run for 10 to 15 seconds. then I kill the ignition switch. Just a smooth shut down.
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Richard 1979 IH Cub Cadet 782 w/CH20, dual hydraulics, power steering and Cat 0 three point
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#7
11-13-2025, 05:52 PM
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1864 keeps running for a while after turning key off
You could try turning off the engine with the pto engaged/mower deck running after idling a few minutes. The load of the deck will cause the engine to shut down quicker.
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#8
11-13-2025, 08:41 PM
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I do idle it for a little while before shutting it off and it's the only one of four Commands here that doesn't shut down immediately when the key us shut off. I guess if it isn't fixed, I may have to add a switch, like RLause suggested.
I did test the fuel solenoid to make sure it closes when 12V is applied and opens right away when power is removed. I thoroughly cleaned all of the grounds and terminals on the wiring harness. The stator was burned in one area and insulation was worn off of its wires in one place, so I'm hoping I fixed the problem. I got it put together today, so I'll be testing it tomorrow after I do a little maintenance on the deck.
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2 Originals, 100, 105, 125, 1450, 1200, 2 IH 982's, 1211, 1872, 2072, 2-1864's, 1782, a few 42" front blades, 2 Haban 54" blades, Haban sickle mower, BB36, QA-36A, 42" IH rear blade, 42" IH landscape rake, #1 tiller, #40 box blade, 59M shredder, #2 cart, International 3312 push mower, International 250 power washer, 1952 IH refridgerator, 1971 IH 1210 3/4T 4x4 truck
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#9
11-14-2025, 09:12 AM
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Make sure that when the key is turned off, that the power to the IGN system/coil is also disconnected, or if it is a magneto system, that the magneto kill wire is grounded.
I've seen on a battery powered Ign system, someone modifies the wiring,and the power, while it is disconnected from the battery, it is still being fed by the alternator and thus the engine will continue to run for a bit. Or, someone purchased a "will fit" IGN switch. Do check it out as you are describing a similar situation. ASSUME NOTHING, TEST!
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#10
11-14-2025, 10:02 AM
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