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Oliver 99 Spark Plugs

F

Formerly PaMike

Member
What plugs do you guys recommend for an Oliver 99. Manual says Champion #0 Commercial. I found a chart that crosses that over to a Champion W10.
I need to look what is it after it comes in from plowing snow, but I know what is in it fouls easily and probably isn't correct.
 
What sort of fouling? Changing the plug grade can have other effects. No amount of grade changing would help in the long run if if it is the carbutation which is at fault. Burning off deposits due to excessive oil consumption will not make the engine less worn. Etc, etc.

I run my kero 90 on W10s and it performs well, considering its age.
 
I don't know when the plugs were last changed. Probably 20 years ago. Just thought it would be a good idea to put new ones in. Sometimes 1 cylinder will start missing.
 
I have a NAPA tractor parts catalog from 1972, which has an Oliver 1800 pulling an Oliver 5 bottom plow on the front cover, and it says for 302 engine use W-14 for light service, W-10 for normal service (exc. 99HC use UD-16), and D-14 for heavy use. And for 443 engine it only list W-14 for normal and light service. I hope this is helpful.
 
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