after two days of sorting my carb out,i found out my new sparkplug was a dud.

which,makes me think what are all the numbers and letters on the plugs.

and why when the plugs look the same.

after two days of sorting my carb out,i found out my new sparkplug was a dud.

which,makes me think what are all the numbers and letters on the plugs.

and why when the plugs look the same.

Youre unlucky to get a new dud plug, cant happen often. The numbers a a manufacturers code for heat range thread size and length etc, Why what?

Youre unlucky to get a new dud plug, cant happen often. The numbers a a manufacturers code for heat range thread size and length etc, Why what?

I know where i like to stick there plug,up there ngk.

what are all the numbers and letters on the plugs.

and why when the plugs look the same.

Aye russ -- like O,git. says its running temp diffrence"s i,e. NGK 2411 B8ES ----RD400

NGK 2611 B9ES-----DT400

Both are identical lenth [thread] +gap. but will operate at diff temperature ..

If it's of any help, I can recommend Bosch plugs

what are all the numbers and letters on the plugs.

and why when the plugs look the same.

Aye russ -- like O,git. says its running temp diffrence"s i,e. NGK 2411 B8ES ----RD400

NGK 2611 B9ES-----DT400

Both are identical lenth [thread] +gap. but will operate at diff temperature ..

thanks for all your info,i shall remember to check plug first.