M111 cold start issue

[grober]

sorry to hijack the OP's thread. Grober, I was thinking to use NGK BCP5ES, but seems this side it is much easier to get the BP5ES instead. Difference is hex size. Would this be a problem (having a bigger hex size, while reach, and other parameters are the same)? This could be a dumb question, I guess.

the reason for BCP5ES is NGK Partfinder Product Cross Reference

The 5 is a hotter running plug. Don't think you will get a plug socket down the spark plug hole to fit the larger hex?

http://www.ngk.de/fileadmin/Dokumen..._in_download_area/ngk_zuendkerzen_code_en.pdf