I recently bought a used M7040. A couple of weeks ago a stick kicked up while I was mowing and broke off the fuel transfer pump. It took forever to bleed the air out of the system, but I think that’s good now. At less than full throttle it will kick then die. When it’s running, if you very gradually reduce the throttle it will continue to run. If you cut the throttle at all abruptly, it dies. Any help will be greatly appreciated!