I have a JD trail buck 650, and it runs strong for a minute or two, but once it gets warm it will stumble and backfire any time you get over about 1/3 throttle. It acts like it is starving for fuel, because if I cover the carb inlet with my hand slightly it will run a little bit better, but still not great. I've taken the carb all the way apart and cleaned it twice, and I experimented with moving the main jet needle up a notch by adjusting the two circlips, but that made no difference.
Is there a fuel pump or something else I need to check to make sure the carb has good fuel supply? Anyone ever seen this before or have any ideas? I've not ruled out an electrical issue, but beings as it runs slightly better when I "choke" it with my hand, I've been leaning towards a fuel issue.
Thanks,
Todd
Is there a fuel pump or something else I need to check to make sure the carb has good fuel supply? Anyone ever seen this before or have any ideas? I've not ruled out an electrical issue, but beings as it runs slightly better when I "choke" it with my hand, I've been leaning towards a fuel issue.
Thanks,
Todd