Pe90/470 conv. Slight misfire or hesitation

[Swamphoppin]

Only on one side… little bit of black occasionally white/blue smoke. Don’t notice it when I’m running only at idle to 7-800 rpm.

 

[Alaska viking]

I get a similar hiccup occasionally, bet not anything I worry about. Maybe a drop of water in my fuel got by the filter, or some other gremlin.
I won't worry, unless it is more than the odd, pop or tiny miss once in a great while.
Usually happens when cold, for me, engine-wise.