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  #21  
Old 07-08-2020, 11:48 AM
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RLause RLause is offline
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Did you by any chance check the resistance of one of the plugs after it failed. Be interesting to know the ohms from the electrode to the shell.
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1979 IH Cub Cadet 782 w/CH20, dual hydraulics, power steering and Cat 0 three point
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  #22  
Old 07-08-2020, 01:27 PM
rsshallop rsshallop is offline
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Ok here is what I got with the multimeter set at 200 ohms.

- touch negative and positive probes together: 1.6 ohms steady

- test against a new NGK b-6l plug that I have as a spare: 1:9 ohms steady

- clean up electrode tip (bad NGK) and test: bouncy, sometimes as low as 1.5 going up to high single and into double digits.

I just went out and started up the engine. Sounds Ok, but I need to tune it further. I think I'll have to be less cheap and put the new points I have into it.
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  #23  
Old 07-08-2020, 05:50 PM
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The plugs that wouldn't fire sounds like the electrode to shell has a low resistance.
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1979 IH Cub Cadet 782 w/CH20, dual hydraulics, power steering and Cat 0 three point
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  #24  
Old 07-08-2020, 10:52 PM
rsshallop rsshallop is offline
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Sorry Richard, I didn't read your question properly before I responded. The readings I gave you were from the terminal end of the plug to the centre electrode. Now, with my multimeter set at 200K ohms, here is what I got from the shell to the centre electrode.

bad plug: 160.00 ohms

good plug: 1 .

Hope that makes more sense.

Ross
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  #25  
Old 07-09-2020, 11:48 AM
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Makes a lot of sense. 160Ω makes a great path to ground for the high voltage. Sounds like the plugs are building up a carbon deposit. Good luck.
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1979 IH Cub Cadet 782 w/CH20, dual hydraulics, power steering and Cat 0 three point
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  #26  
Old 07-09-2020, 12:25 PM
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He needs to eliminate the carbon issue,
be it a screwed up engine rebuild or a simple
rich carb issue.
When that is right I believe his "plug" problem will be a non issue.
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  #27  
Old 07-09-2020, 12:57 PM
crazycubtrio crazycubtrio is offline
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Just out of curiosity you don’t think a carb float with a little bitty hole in it is causing your problems do you? Or possibly adjusted right on the edge of not being able to keep the gas from flooding the bowl while running and jiggling around?
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  #28  
Old 07-09-2020, 03:32 PM
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Ditto what George said.
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1979 IH Cub Cadet 782 w/CH20, dual hydraulics, power steering and Cat 0 three point
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  #29  
Old 07-09-2020, 04:18 PM
Merk Merk is offline
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Are you using a Walbro carb?
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  #30  
Old 07-09-2020, 09:22 PM
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I'm sure the carburetor is the Kohler type as described on page 11 of the Kohler Engine Owner's Manual Models K241 thru K341. It's a china knock off with the plastic float. I've had it apart to clean it up with carburetor cleaner and at that time I did adjust the tabs on the float hinge to make the float sit level horizontally (as it appeared to me). I think I am going to take the carburetor back off and take a second look at everything (especially how the float is sitting) . I'm also going to put the new points I have into the engine and get the right fuel (regular mixed with fuel stabilizer) And, a new ignition wire. Hopefully that will be what the doctor ordered.
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