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Old 29 Nov 2011, 02:17 pm
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Default honda generator SPARK PLUG !!!!?

Hi all, i use a honda GX390 engine and the port where my spark plug goes into is cross threaded, i will need to use a tap and die set on it, but does any one know the size i should use ? again its not the spark plug thats cross threaded its the part it goes into , i need to know the size for the tap and die, thank you so much for your help if you can.
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Old 29 Nov 2011, 02:31 pm
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No, you should use a 14mm spark plug thread chaser (you should get this at tools specialists)

If the cross threading is bad, whoever put it in hasn't put it in by hand first. Always thread a spark plug in to the head by hand, then nip it tight with a socket.

Anyway the size is 14mm, so M14. I *think* the pitch is 1.25 but you'll need to use a metric screw pitch guage to check.

I recommend you buy and use a chaser first!

edit: The pitch is 1.25.
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