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Recommended spark plugs for Cat 15

Recommended spark plugs for Cat 15

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8C 361
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What spark plugs are you using in your Cat 15? My 8C 20 has been giving me fits starting lately and I want to try new plugs. I am currently running A.C. C 70's. They don't look like they are fouling, but they are very old.I want to try new ones.

Thanks,

Tom
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Sat, Apr 28, 2018 8:17 PM
Old Magnet
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If those are the 7/8" x 18 tpi, originals were Champion #1 Commercial and interchange with Autolite #3076 or AC Delco C75.
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Sat, Apr 28, 2018 10:42 PM
Mike Meyer
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Reply to Old Magnet:
If those are the 7/8" x 18 tpi, originals were Champion #1 Commercial and interchange with Autolite #3076 or AC Delco C75.
I run either Autolite 3076 or 3077 in my gas Cats including my 15 with good results, the 3077 is a little hotter than the 3076 if the tractor burns a bit of oil.
Mike
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Sun, Apr 29, 2018 5:37 AM
8C 361
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Reply to Mike Meyer:
I run either Autolite 3076 or 3077 in my gas Cats including my 15 with good results, the 3077 is a little hotter than the 3076 if the tractor burns a bit of oil.
Mike
Thanks Pete and Mike. I ordered Autolite 3076's from Amazon. They will be here Wednesday.

Tom
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Sun, Apr 29, 2018 9:07 PM
biggastractor
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Reply to 8C 361:
Thanks Pete and Mike. I ordered Autolite 3076's from Amazon. They will be here Wednesday.

Tom
Autolite 3077s are preferred but were discontinued a few years ago. As stated 3076s will work. I have a chart of compatible replacements but can't seem to upload it to this post. If you want it just PM me.

good Luck

Biggastractor
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Sun, Apr 29, 2018 10:47 PM
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