nikki carb #97747 on a generac 4kw gennie. When you start it it's running overly rich. Pull the throttle arm back to idle it smooths out and then let the arm back off slowly it runs fine 'til I load it with my heat gun and then goes back to an overrich mixture. What I've done: removed float bowl and all is clean, main jet is clean, float is parallel to carb body when carb body is upside down, with carb body upside down float needle will hold a vacuum. I think the needle is sealing good 'cause the carb doesn't overflow while sitting. This is all done with the air filter off and it is new anyway. I set the valves to spec. Am I missing something simple??
TIA,
Mike
TIA,
Mike