I have had two F300's, the first one was hard to start, even after placing an aftermarket manifold, and rebuilding the carb.
Acted just like you described, when it was cold I had to remove the air breather and cover the carb with my hand to get it to start.
The one I have now started in the recent 19 degree we had during an ice storm on the third revolution. I believe a correct tune up where it starts easily is the trick.
So many tractors now have the 3 9/16 fire crater or stepped pistons put in them and I believe many people are unaware of the distributor advance differences, carb setting/ jetting between original flat top piston equipped engines & the new higher compression ones.
I believe the issue is in the slow jet side of the carb, I also know the choke butterfly in the carb has a small "flap" built into it to prevent over choking. That may be the culprit, but you will need to ask someone much more experienced than me that knows the issue and how to fix it.
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Today's Featured Article - The Day Mom Drove the 8N - by Brian Browning. My Dad was wanting to put in a garden but couldn't operate the 8N and handle the old horse drawn plow he had found and rigged up to use with the tractor. Well, he decided to go get Mom out of the house and have her drive the tractor while he walked behind the plow. You got to understand that while my Mom is a hard worker who will always help whenever she can... she had never operated farm machinery before that day. Dad got her out there, explained how the clutch was the same as in our o
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