surge on toro ccr3650 snowblower
I have a toro ccr 3650 snowblower that has a extreme surge both under no load and when i push the paddles against the sidewalk. Im sure it a carb problem. I know the engine is simular to the lawn boy duraforce engine. Has anyone ever drilled the jets on a toro r tec engine to help this problem or is that only dura force and what size bits would i use? Ive done the usual cleaning jets and body, replace gaskets and flush tank but didnt help.