While looking down the carburetor in fully closed position, I can VERY CLEARLY see the slot on the barrel where the barrel set screw goes into. I've had problems before where the throttle barrel won't close completely, but I've never seen the barrel slot being visible when carb is closed. Is this possible on some engines?

This is a brand new MDS V2 carb that just arrived today from HorizonHobby. I don't believe they would send out detective parts on a repair order. Any help would be greatly appreciated.

I would not worry about it unless the engine is not working right.

""Is this possible on some engines? ""

YUP

I haven't had a chance to test run the engine yet. However, even if the engine runs without problem I still think this is vey abnormal. Could MDS users with the new V2 carb give some input please. Does your carb show the barrel slot in fully closed position?

My Magnum 61's carb does that. It won't shut off without sticking a shoe in the prop, either. Don't know if the slot is why...

The C2 carb on my 78 shows about 1/3 of the slot when fully closed;it runs flawlessly,and shuts off on demand.

Yeah, I was wondering the samething. I just bought 2 Super Tigres, a .40 and .45, both carburetors have the slot showing at fully closed, yet an older ST S.29 doesn't. I guess they are OK.