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Author Topic: what make and size spark plug  (Read 876 times)
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meanmachine
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« on: May 20, 2013, 06:44:05 PM »

what make and size spark plug should a guy run in a 6.5 hp harbor freight clone hoz. engine this is for a racing cart on racing gas
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Gearhead0101
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Clay Daniel Hawkins @clayhawk75
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« Reply #1 on: April 18, 2014, 09:19:13 PM »

I dig NGK plugs, bought one for my old go kart with a 6.5HP 212cc predator, but I don't remember the part number on it, gimme a bit I'll rummage through my files. I save everything, so I should still have all that. 
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GRUBDIGGER
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« Reply #2 on: April 20, 2014, 12:58:02 PM »

NGK BPR4ES OR BPR2ES
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JOHN HERRING
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« Reply #2 on: April 20, 2014, 12:58:02 PM »

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TomL
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« Reply #3 on: April 20, 2014, 04:16:57 PM »

Autolite 3910X is what the Kart guys use. This is what we run in our MiniPro machines.



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« Reply #4 on: April 20, 2014, 04:24:33 PM »

NGK BPR4ES OR BPR2ES

why would you run a plug that hot. you want the right heat range for the engine and most of the time colder is better.

factory honda is ngk bpr5es or bpr6es
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Guillaume Mercier-Roy

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« Reply #5 on: April 20, 2014, 07:25:04 PM »

HIGH COMPRESSION, COLDER PLUG. LOWER COMPRESSION, HOTTER PLUG.
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JOHN HERRING
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