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Fatboy Spark Plug Question???

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Old Aug 26, 2009 | 10:57 AM
  #1  
keeferfish's Avatar
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Default Fatboy Spark Plug Question???

I’ll start by saying this might be a stupid question but trying to do things on my so here goes.
While I was picking up stuff for an oil change I decided I should go ahead and get plugs. I go to change them and find out the stock plugs the Harley dealer gave me (5/8) are not the same size as what’s in the motor (Accel brand). The 13/16 socket barley fits on the plug, feels loose and will not slide completely into the head? WTF? When I try to turn the plug if feels as if it’s going to strip so I stop. What should I do? I considered finding a dirt bike plug tool thinking it will slide into the head because they are thin walled???
(2000 Fatboy Carb. w/ cam, exhaust and some head work)
 
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Old Aug 26, 2009 | 11:04 AM
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you are right some plugs are a diff sze 11/16 or 18mm I think .
seems like they would all be either 5/8 or 13/16 but ????
anybody know for sure??
 
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Old Aug 26, 2009 | 11:42 AM
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Fatboys come with the special fat plugs. Cuz' they are fat.

SE plugs are 11/16'ths.

Then you gots the 5/8ths and 13/16'ths.

Buy yourself a thin walled plug socket of the appropriate size.

You have one of those 3
 
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Old Aug 27, 2009 | 07:17 AM
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i use a box wrench for the screamin eagle plugs but going to get the ngk iridium next week
 
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Old Aug 27, 2009 | 01:07 PM
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Most probably 11/16. Autolites also.
NGK Iridiums are 5/8.
 
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