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Reload this Page Champion Spark Plug Gap Confusion
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  #1  
Old 05-18-2026, 01:19 PM
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Default Champion Spark Plug Gap Confusion
I'm running a 1981 782 with a KT-17 II on Champions and always follow the Kohler Owners Manual (dated 12/95) for plug type and gap. It calls for RV15YC or RV15YC4 with a gap of .025 on Page 10.

It was brought to my attention that there was a Cub Cadet Corporation Service Bulletin dated 9/27/1993 that states that the "NEW Air Gap to be used by all technicians effective immediately is now .045" when using Champion plugs.

That's quite a size difference! What do the Kohler experts here recommend? I don't want any performance issues.

Many thanks,

ccguy
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Old 05-18-2026, 08:41 PM
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Can you post the bulletin?
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Old 05-20-2026, 02:32 PM
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I don't have a copy of the service bulletin. I will ask my friend if he has it.
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Old 05-20-2026, 08:19 PM
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I always thought and used .030 as the gap
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Old 05-22-2026, 12:11 PM
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1993 Service Bulletin CC-265
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File Type: pdf CC-265.pdf (57.9 KB, 19 views)
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Old 05-23-2026, 12:47 AM
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So, RV15YC4, gap .045.... good to know.
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