Autolite 216 or 437?

Anonymous-0

Well-known Member
I went to NAPA the other day to get a set of plugs for my 49 8n and the man gave me 4 Autolite 216's. But after reading the archives here everybody says to get the Autolite 437's. What is the difference?
 
(quoted from post at 08:25:11 08/04/08) I went to NAPA the other day to get a set of plugs for my 49 8n and the man gave me 4 Autolite 216's. But after reading the archives here everybody says to get the Autolite 437's. What is the difference?

That # crosses over to the recomended plug H10=216 Autolite 437 is a hotter plug. Less chance of fouling.
 
Burn hotter with today's gas making the tractor run better. If Dell is out there he will give you a better explanation than I. BTW, I use the 437 and the tractor runs great.

NDG
 
TW........sparkies come in 2-variety's HOT and COLD. Too HOT and the gas will self-ignite (ping) before its supposed to, lack power and melt the top of yer piston. Too COLD and yer plugs won't burn off the natural carbon by-products of combustion and FOUL out and quit sparkling.

The 1939 low compression N-Engine was designed for un-leaded 70-octane gasoline and cool Champion H-10's. Modern no-lead gasoline has additional additives that condense on the plug business end and FOUL the plug so a HOTTER (temp range) is recommended, such as Champion H-12.

Many find enny Champion to be un-satisfactory in use because of early fouling and short life. And many Champions have built-in anti-radio static resistors which cut-down the available sparkie volts to jump the gap. NOT GOOD with marginal ignition systems.

Howsomevers; we recommend the HOTTER AutoLite 437's (gap = 0.025") with extended tip for self-cleaning and less fouling. HOTTER sparkies such as the 437's are also recommended for oil-burning worn engines too. Always use old fashioned COPPER-CORE sparkie wire 'stedda' modern carbon-core string sparkie wire .......Dell, yer self-appointed sparkie-meister
 
(quoted from post at 07:25:11 08/04/08) I went to NAPA the other day to get a set of plugs for my 49 8n and the man gave me 4 Autolite 216's. But after reading the archives here everybody says to get the Autolite 437's. What is the difference?

I asked for 437s and the parts guy tried to give me AL85s. He said thats what the 437 crosses over to. 216s were in the tractor when I bought it.
I dont know if the 85s are considered a hot or cold plug.
 
Yes, MotorCraft AL85's cross to 437's and therefore are considered to be a "hotter" plug. 216's cross to H-10's and are considered to be a "colder" plug. Simple, eh? ......Dell yer self-appointed sparkie-meister
 
I put 437's in mine awhile back and couldn't believe how much better it ran. This is with gas/diesel mix I bought home from work. A couple of times a year a pickup with a diesel will be towed in to get gas pumped out that got put in when the owner had a brain-f**t. I did make the mistake of putting some in my 17 horse Kohler powered lawnmower and blew the head gasket! That was smart!? I'll never use Champion H-12's again!
 

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