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Most common spark plugs?

Mycamaro_68

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Hey guys, I am wanting to get a stock pile of spark plugs and am wanting to know what some of the more common ones are. I am a big fan of NGK and would like to stick with them. I know BPM7A is fairly common, are there any others that would be handy to have around? Thanks in advance for the help.
 

Adirondackstihl

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Bosch WSR6F = BPMR7A

I prefer the NGK for no reason other than STIHL sending out a batch of bad Bosch plugs on some 362's years ago and wrecking top ends
 

DSS

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Bosch WSR6F = BPMR7A

I prefer the NGK for no reason other than STIHL sending out a batch of bad Bosch plugs on some 362's years ago and wrecking top ends
Plus you rarely wear pants
 

Mycamaro_68

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Thanks Adirondackstihl! Next question then would be, what is the difference between a BPM7A and a BPMR7A?
 

Adirondackstihl

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Is the resistor necessary for some saws and not for others? Would it be detrimental to install a resistor spark plug in a saw that doesn't need it? Or vice-versa?
It's for electronic interference.
Won't hurt nothing to run a non resistor plug
 
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