Problem Starting a 1964 1010

Hey everybody, I’m having some trouble with my 1964 1010 starting, when I start it seems like it’s only running on 2 cylinders and then after about 10 seconds the other cylinders come on line and it runs fine. It’s only been doing that for the last week.
In February of this year All new plugs, plug wires, points and distributor cap were installed by a John Deere Dealership but had no problems until this week.

Hey, cool video of your starting issue. Have you had your plugs out yet? I noticed your old girl smokes a little bit (like mine) and I've found that sometimes if an older engine doesn't get to work hard once in a while the plugs can build up with carbon. On a cold start when the mixture is rich it makes it even worse. I'm not an expert JD mechanic by any means but it's best to go after it systematically. Prove the plugs are okay. If they'll fit, try them in an old lawn mower, etc. and run them under load. New plugs aren't always good plugs. Start your cold engine but only let it run a little bit. Shut if off and check to see which plugs are hot and which are cold. This will isolate your problem cylinders. (Don't burn your fingers!!) Make sure adequate fire is getting to each plug. I found my distributor problem by pulling back the spark plug wire boot on the plug end and then with the engine running pulled the wire off the plug. There should be a nice blue spark jumping from the end of the wire to the end terminal of the plug. Take precautions so you don't get shocked first!! (All of mine were arcing but one was noticeably weaker.) A weak coil can give you fits. Usually though it's more noticeable on a hot engine. Good luck!

Thank you for the detailed post, I’ll try a few things tomorrow afternoon and see what if can find, I’m starting to think that it might be a fuel problem, mostly because after about 10 seconds all the cylinders start firing and the engine runs a smooth as butter for the rest of the day,

But like you said, it only does it when the engine is cold, and on a side note, yes this tracter does not get put underload anymore, its mostly just for drriving around the farm and some pulling every now and then.