Spark plug question for experts

[Guest]

I've got an old Cheetah that I"ve been running for years now. I was reading in the manual that I should be using NGK B9ES plugs. However, the plugs I've been using are NGK BR9ES. I've just always used them, and the machine runs well.

My question is, what's the difference between these two plugs? Does the R stand for something I should be concerned about? If you can help, I'd appreciate it.

[Guest]

The ES has to do with the depth of the threads, or the "thread reach" as they call it. I believe the ES is a 3/4" thread reach. And I believe the R means it is a "Resister" type as opposed to a "Insulator" type. A resister type is use with motors that have "electronics" on them. Like electronic sensors or even electronic ignitions.

[This message has been edited by HANGBELLY (edited 12-24-2002).]

[This message has been edited by HANGBELLY (edited 12-24-2002).]

[This message has been edited by HANGBELLY (edited 12-24-2002).]

[Guest]

the r stands for resistor pugs which is used on electronic ign as stated in the first post . you may have noticed that electrode is a little smaller on the r plug than the e plug. this doesnt make a difference but i have found on older machines the e doesnt fowl quit as easy as the resistor plug

[knoppers]

grouse hunter is 100% right. the R means your plug has a resistor, which means when you sled by your niegbors house, they TV won't get static lines across the screen. other than that, its nothing, I always use NGK BR9ES plugs in all my sleds. and have no problems what so ever. I even recremend this plug to use.