FWIW. my M103 is so on the hairy edge of running lean that it won't start easily in colder weather (all winter). It can crank for a good 10 seconds and won't start. When warm it has no issue. Now that the weather is warming up here in NY (50 degrees) it starts within one second of cranking. This all happened when I replaced the EHA. When I replaced it (to cure the common seeping EHA) the motor seemed to run richer. I didn't want to mess with the EHA adjustment until the weather warmed up and just cranked the mixture to as lean as I could get it. The rich condition was much better but the starting problem showed up. If you adjusted the mixture before this started you might want to richen the mixture a quarter turn and see what happens with your starting problem. Like I said, FWIW.

__________________

88 300e
89 300e
93 400e
93 500e
77 308 GTB