806 gas spark plugs

lee little · Jun 2, 2014

I am going to try to pick up my "new" 806 Wednesday. It is a gas. What are the best spark plugs to put in it? Thanks for your help, Lee.

randy hall · Jun 2, 2014

autolite 3116

kub6040 · Jun 2, 2014

Champion D16

rustyfarmall · Jun 3, 2014

(quoted from post at 20:05:28 06/02/14) autolite 3116

OR Autolite 386 or 388.

lee little · Jun 3, 2014

Thanks for the help guys! Lee

FBH44 · Jun 3, 2014

One time Autolite sent me a spark plug catalog. Here"s the info on heat ranges;

2014 Autolite Spark Plug catalog
Heat Range Chart page 4-5
18MM thread size
1/2” reach
7/8” hex
HOT rating
388 Standard resistor plug
3116 ‘Power-Tip’ Non-Resistor plug
386 Standard resistor plug
-- gap --
-- gap --
373 Standard Non-Resistor plug
COLD rating

Each step up = 70º – 120º increase in spark plug tip temperature.
Self-cleaning zone = 500°C to 850°C tip temperature.
IF TOO HOT = Possible severe engine damage, pre-ignition, detonation with racing / high performance engines. .
IF TOO COLD = Possible fouling, possible mis-firing, but no engine damage.

pete 23 · Jun 3, 2014

The champion D16 and 8 commercial were superceded way back in the 70's. IH recommendations for Champion plugs are, D-15Y for normal work, D-18Y for lighter working. If just puttering a D-21 will work fine. Real heavy constant heavy load, the Champion number escapes me but we never used it. I know, Champion haters but this is what IH put in them and once they got them engines straightened out with good rings, valve seals and low ash oil these plugs worked great.

806 gas spark plugs

lee little

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randy hall

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kub6040

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rustyfarmall

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lee little

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FBH44

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pete 23

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