Hello all, I pickup a new walbro WJ-84 carb on *bay with the intent of using it on a 75cc 3W side carb engine. The walbro has a venturi dia. of 17.5mm and is a good 3-4mm larger than the stock tillotson. This Tillotson also happens to be the exact model that is used on the 3W-50i. Would this walbro be too much for a 75cc? Also why does 3W use such a small carb on this engine? The walbro on my G-62 has a larger venturi (15mm).

Thanks, Mike