Cub Cadet sc621 carb
 

I have an old 1988 sc621 walk behind with a Briggs engine. I need a carb for this mod. part# BS-692648. The USA carbs are no longer available and none of the 4 generic carbs I have ordered from Amazon will work with my primer block that hold the oblong style filter. I ended up cleaning the old carb and the primer works great on it, but the needle valve is bad. Would anyone have a suggestion what to do?

Needle & seat - BS-398188
https://shop.briggsandstratton.com/p...UGvZCJRYy8rZln