What color is the smoke?
Black--unburned fuel, not a big deal
Whitish--too much air, not enough fuel
Blue--I don't remember lol, but that's the worst case
The first 2 overall are not a big deal with that many hours and can probably just be fixed with some adjustments to the fuel system. But I wouldn't be too concerned.
“Every step we take towards making the State the Caretaker of our lives,
by that much we move toward making the State our Master.”
~Dwight D. Eisenhower