This may sound stupid, but are you using your choke when trying to start it cold? I have to and then let it run a few minutes at 3/4 choke before backing it off.
Correct me if I am wrong. My grandfather told me that when cold on low compression engines if you use choke, it helps engine pull fuel in due to low compression. Once running, you can back it off. I remember watching grandpa put his hand over the carb when starting engines and the taking it off once it fired.
Thoughts?
Chris
