hard starting late model G

Got my deceased uncles 53 G and it wont start unless I open the petcocks. The neighbors have 2 late G's and they don't have to do that. Seems like it has lots of compression. what do you all think could be going on with this?
 
"Seems like it has lots of compression."

Maybe the neighbors' don't?
I can't tell you on your G if that was normal or not. On my '46 A,
I had to open them to spin the engine. Even with the starter.
My 1953 JD 50 doesn't even have petcocks, so...?
 
I know there are guys on here that know things better but I had a G back in the early 70s and you had to open the petcocks for it to start.
 
When I bought my 49 G in 1965 it had all fuel pistons and it would turn over with the petcocks closed. In 1966 I overhauled it and put in M&W aluminum pistons after that I had to open the petcocks.
 
I always had to open the petcocks on my G. Then I replaced the starter with a gear reduction starter, and I don't have to anymore. I still do most of the time out of habit.
 
I have aluminum pistons in my G and have never had to use the petcocks to start it.I did overhaul the starter when I did it.
 
Well, yeah- that's why the petcocks are there. Open them, start the thing, and go to work. Try not to fret over it too much.
 
High compression pistons? bad/weak starter? weak battery? I wouldn't worry. Open em,be glad you have lots of compression.
 

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