We have a 1953 NAA Jubilee that we use to mow our runway. Recently, whenever you engage the power take off and run the mower deck the engine boggs down and wants to die. If you disengage the power take off the tractor will run fine at low throttle settings. It seems like a fuel problem. We have cleaned the fuel bowl, screen and blown out the fuel line. Also, the carb has been rebuilt this past spring and we checked the points. It had been running fine.
Was wondering if this sounds familiar to any of you? What common problems we should be looking at. We have an owners manual and have gone through the trouble shooting section to no avail.