Slide carb for Yok .18
I have never owned that engine, but I would say yes. Most of the small block engines made today have one of 2 different bore sizes in the crankcase where the Carb mounts.
Problem is you will spend at least $60 to buy that slide carb brand new and if I'm correct, that Yokomo .18 engine has an ABN sleeve (Nickle plated) which means it will wear out quite quickly. Better to save your money for a new engine down the road. Then you can get one that already comes with a slide carb.