861 sputtering under load

[Big mac@112954]

I replaced the carb with a rebuilt unit and it ran much better. I saw no need to readjust from the factory setting. I replaced the governor spring after I noticed it had been broken and bent to fit the governor arm. I re adjusted the governor linkage to match the service manual. Now when running at wide open throttle it begins to misfire under load and will begin to stall. When I clutch and throttle down the problem seems to go away. Do I have a governor problem or a carb problem? As always your input is valuable to me. Thank you in advance

 

[Eman85]

Did you check fuel flow? Replace fuel filters? Adjust high speed of carburetor? Of course we assume the ignition is completely up to par.
What was the original problem to cause you to replace the carburetor? You say rebuilt unit, you purchased a rebuilt carb?

 

[Btzj02]

It wouldn't hurt to use a timing light to verify your ignition advance is working as designed.

 

[pomester]

I replaced the carb with a rebuilt unit and it ran much better. I saw no need to readjust from the factory setting. I replaced the governor spring after I noticed it had been broken and bent to fit the governor arm. I re adjusted the governor linkage to match the service manual. Now when running at wide open throttle it begins to misfire under load and will begin to stall. When I clutch and throttle down the problem seems to go away. Do I have a governor problem or a carb problem? As always your input is valuable to me. Thank you in advance

"I saw no need to readjust from the factory setting."

I think the symptoms you describe is a good reason to play with the power needle. Try opening it another 1/4-1/2 turn and see if it makes any difference.

 

[Big mac@112954]

This is my first tractor and it came with some problems. With the help I received from this forum I am getting close to having an 861 that works like it was made to do. Thanks for tips on what I hope is the last of my headaches. I will let you know how things go in a couple of days. Thanks again. You guys rock!

 

[showcrop]

try the standard fuel flow test. Test flow all the way from tank THROUGH carb.