russ500 Posted January 20, 2009 Share Posted January 20, 2009 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. Link to comment Share on other sites More sharing options...
Moderator Airhead Posted January 20, 2009 Moderator Share Posted January 20, 2009 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? Link to comment Share on other sites More sharing options...
russ500 Posted January 20, 2009 Author Share Posted January 20, 2009 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. Link to comment Share on other sites More sharing options...
blackhat250 Posted January 20, 2009 Share Posted January 20, 2009 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 .. Link to comment Share on other sites More sharing options...
Madison Motorsport Posted January 21, 2009 Share Posted January 21, 2009 If it's of any help, I can recommend Bosch plugs Link to comment Share on other sites More sharing options...
russ500 Posted January 21, 2009 Author Share Posted January 21, 2009 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. Link to comment Share on other sites More sharing options...
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