So, if you let it warm up enough, it maybe hot enough to keep it going. The plug wires is supposed to be platinum coated if I understand correctly and the explosion will keep it glow. I wouldn't use a $5 plug, I like the trusted brand like OS.
When it bogged down when you apply throttle, it is the sign LSN is too rich.
Even it is not too cold, it is good to let the engine warm up for a few extra seconds.
Even it is not too cold, it is good to let the engine warm up for a few extra seconds.
You can just turn the flywheel with your fingers, if it does not have much resistance, the compression is low. An other possibly is that you still have too much fuel going in. Also, what is the weather like, if it is cold, let the glow plug plugged in for 30s after it started, let the engine...