super h plugs

Loren in WI · Jun 27, 2013

I have a Super H with electronic ignition. what plugs and what gap should I run?

georgeky · Jun 27, 2013

The book calls for Champion D15 plugs gapped at 25 thousenths.

560farm · Jun 27, 2013

I run Autolite 3116 plugs gapped at .030" without electronic ign. On the 560 with electronic ign I run either .035 or .040" can't remember off hand.

TWheat · Jun 28, 2013

With alldue respect to George and the Book, it depends on what you are going to use it for in my opinion. For my non-hard working Farmalls I have had best results with Champion D 21.

David G · Jun 28, 2013

Autolite 386 will work fine, they are available at tractor supply stores.

Bob M · Jun 28, 2013

My experience: Champion D-17 if worked hard; D-21 if used only lightly (show/parade, etc). Autolite and A/C equivalents work fine too.

With electronic ignition and a matching coil you can gap as high a 0.035 - 0.040. HOWEVER the cap and wires must be in good condition and kept clean. Otherwise it'll be prone to misfire under damp conditions.

the tractor vet · Jun 28, 2013

Well ya hear all about what plugs are the best from everybody . i only work on Farmall tractors and i have played the plug game for years . So here is my take on this . I will never use a Champion plug in nothing either the Auto Lite or Motor Craft or the A/C . If ya have to use a Champion D21 plug then son you got problems your Tonka toy needs fixed and it is not tuned properly. I have had the best luck with a C-86 A/C next the Auto Lites or Motor Crafts. in tractors . When Auto Lite was part of Ford way back we had the best luck with them on the drag strip . use to use them in the Mo pars and drop two tenths just by switching from Champions to the Auto Lites But for some reason the A/C's seem to work best in Farmalls

super h plugs

Loren in WI

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georgeky

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560farm

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TWheat

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David G

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Bob M

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the tractor vet

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