ORIGINAL: gkamysz
Injected diesels don't richen the mix when cold(no need as vaporization isn't left solely to evaporation). But they do add heat by an intake air heater or glow plugs when things get to freezing. Older non computer diesels, like Dodge Cummins 12 valve, can get some extra starting oomph by just barely touching the throttle in cold weather. Too much and I guess you'll be picking up pieces.
my old international tractor don't have glow but a switch on the diesel system that give more fuel when its cold. And my Toyota diesel have some kind of automatic choke.
my sc 108 2stroke convertet to diesel. i use a finger on the muffler output to choke it when its cold. and then i dont have to touch the compression adjustment for every single start. if im using the same fuel mix.