RE: exasperated (@#$%) Jett .50 owner
Ahh... good deal checking that !
Does sound like it was a liner rotation. Just toss a 9x7 prop on it and run it a time or two. Find peak rpm very briefly, back it down about 1000 rpm and just let it run. Should run properly now.
If its not running, no problem sending it back. Stuff happens, and ARF fuel system installs are not always the best. Yes, you want to include the muffler just so it is complete as a set.
The liner port shapes can appear a bit irregular - not always crisp and clean rectangles or ovals - shaped as they are for a reason.
Let me know how you make out
Bob