Is the carb on these two units basically the same. I want to take a new carb off a trimmer and put it on an old PB650 to confirm that carb will fix the problem. I have cleaned the ports, new carb kit, new fuel filter and new head gasket and new spark plug. When I accelerate the unit it bogs. If I squirt carb cleaner into the carb slowly it takes off and runs as long as I squirt.