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SPARK PLUGS FOR A 39 WC


 
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Super Trucker
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PostPosted: Sun Aug 26, 2012 10:32 am    Post subject: SPARK PLUGS FOR A 39 WC Reply to specific post Reply with quote

What plugs are used in a 39 wc? Somebody put taper fit auto plugs in.
 
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mdtractormechanic
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PostPosted: Sun Aug 26, 2012 11:02 am    Post subject: Re: SPARK PLUGS FOR A 39 WC Reply to specific post Reply with quote

Champion J-8C (readily available)
 


Last edited by mdtractormechanic on Tue Aug 28, 2012 10:32 am; edited 1 time in total
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acadam20
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PostPosted: Sun Aug 26, 2012 1:11 pm    Post subject: Re: SPARK PLUGS FOR A 39 WC Reply to specific post Reply with quote

Autolite 295 will fit and be better than a Champion.
 
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mdtractormechanic
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PostPosted: Sun Aug 26, 2012 3:55 pm    Post subject: Re: SPARK PLUGS FOR A 39 WC Reply to specific post Reply with quote

The original recommended spark plugs were the Champion J-8C, AC 45 and Autolite AN7. These plugs were in the medium heat range. The replacement plug for the AN7 is the 295 which is a hotter plug. Regardless of some people's bias for certain brands I would stay with the original heat range as is designated by the manufacture of the engine. If you find the plugs fowling due to engine wear, incrementally move to the next heat range. Be careful not to go to high as this will cause pre-ignition and could cause the tip to burn off which in turn will damage the engine.
 
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myallis
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PostPosted: Sun Aug 26, 2012 4:39 pm    Post subject: Re: SPARK PLUGS FOR A 39 WC Reply to specific post Reply with quote

ac delco r45 or r43
 
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chalmersbob(Pa)
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PostPosted: Sun Aug 26, 2012 6:20 pm    Post subject: Re: SPARK PLUGS FOR A 39 WC Reply to specific post Reply with quote

Champion J8 or the hotter J11.
Champion seem to work the best in my Allis's
LOL Bob
 
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