I just got the engine and it looks great. The engine has quality all over it. The muffler is very lightly built, but I think it should work out fine. I will try and get a good test run this weekend. The Walbro carb is a wt-731 and is a good carb, but a little small for a engine of this size. I think that is why you are not seeing the RPM's like I have on the Brillelli 46. I will test run a gallon of fuel thru it using the WT-731 than I will change it out to a Walbro 201 carb. The WT-731 is a 9.5mm carb and the WT-201 is a 13.4mm carb. The larger venturi of the Walbro 201 will allow the engine to pull in more air and fuel. The 201 carb should give an extra 500RPM are so. I'll keep in touch.

Jim