Thanks for the replies everyone.

I basically took out the carb, soaked it in dishwasher liquid water for 30 min and cleaned it thoroughly using a toothbrush. I then dried it out using compressed air and kept it out in the open for 5 hours to dry further. I then ran some ARO through the carb.

I put everything back together and voila! Fuel flows through like a charm. Basically, my HSN was clogged - it wasn't allowing fuel to enter.

I'm a complete nitro n00b. Any tips to stop fuel clogging in the future? Thank you!

Dr G