My pastor's husky 335 just wouldn't run well. Hard starting, easily bogs down. I offered to take a look. I tore it down and cleaned it up. Washed out the fuel tank, fuel line and filter, cleaned sawdust out of the carb diaphragm. finally got it to idle with a decent trigger response. It still bogs down the revs top out at 5800 and slowly back down from there. What next?