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Spark plug cross reference

jake wells

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This post should be of use to people who can't remember which spark plug crosses to another brand.
champion > RCJ6Y
ngk >>>>> BPMR7A
autolite >> 2984
bosch >>> WSR6F
 

jk14

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I started buying my plugs from rockauto. NGK & Denso are $1.33 each I get 10 at a time so with shipping it works out to like $1.65 each versus $3.50-$4.00 each if I buy them local.
 

redtractor

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They're all the same. :rolleyes:
Naw, I like the real long ones. My theory is that the big explosion in the cylinder opens up the electrode gap so you need the piston to come up and push the gap closed again.

At least that's what some of my customers must think.
 

TJ the Chainsaw Mechanic

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Naw, I like the real long ones. My theory is that the big explosion in the cylinder opens up the electrode gap so you need the piston to come up and push the gap closed again.

At least that's what some of my customers must think.
So that's why the short ones don't last as long!
 
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