728 engine miss w/backfire when warm

/ 728 engine miss w/backfire when warm #1  

Bakerkid

New member
Joined
Jun 26, 2023
Messages
1
Tractor
John Deere 728, 1023, Farmall H
I have a 728 that after cutting longer than 30 minutes, will lose power and sounds like it is running on one cylinder. I replaced the plugs and I thought it was running better. I shut the tractor off to answer a phone call and when I restarted the tractor, the miss was back. When I shut the tractor off, there usually is one backfire. If I wait and let the tractor cool off, it will start and run fine until it gets warm again.
 
/ 728 engine miss w/backfire when warm #2  
Welcome to TBN

More history of the 728 would be helpful.

Assume it is the X728 mfg up until 2012?
 

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