TRW250 carb

[Stubaker58]

Hi,

I'm helping a friend with his TRW250 (basically a B25).
It came to him with a huge file of bills running into the thousands. It looks great and starts, sounds good too ... but (there's always a but!) it does not idle.

It's on a premier concentric (one of the bills). It's a great looking carb but I'm a bit confused as the internal threaded hole where you'd expect to find a pilot jet is empty.

Shouldbit have an internal pilot jet or is the brass screw opposite the air screw the pilot jet?

Thanks

[V500]

There's the mixture adjusting screw on the same side as the slide height adjuster, then the pilot jet is on the other side, a brass screw marked with an "X" on it's head.