So I have multiple Stihl hedge trimmers that are all used on the same fuel and oil mixture of 50-1. This one is the only one that likes to smoke when on full throttle. It’s just over a year old starts second pull ticks over beautifully. I’ve just done a service on it which worked briefly but now it’s back to its old tricks. Can anyone please recommend the next avenue to go down? I’m thinking carbon build up in the exhaust or new carb? What do you all think?

Thanks

Fell for one of the classic blunders, assuming I had proper footing. Ms441c bit me when I took a spill on some sandstone cutting a 2'diameter pine. Worst part is when you brace for the fall and got to decide to catch yourself or drop the saw. I did neither. I dropped the saw teeth first on my left calf. Lesson 2. It's not summer and I'm going to get fitted with some work overalls. Be careful out there. When I braced for my fall, the hand on the saw accidentally revved the engine and I pooped my pants thinking I'm about to amputate my favorite leg. Call me humbled