Vanguard 31hp problem

I am using this engine on a custom vehicle and have run into a problem where I am apparently running on only a single cylinder. We noticed the exhaust note was different (running dual exhaust) from one side to the other. Upon closer inspection the exhaust from one cylinder was cool all the way up to the header pipe. That side is getting spark and sparkplug is working. Also checked compression on both cylinders and both are at 120 psi. So it appears there is some sort of fuel issue in the carb. I am still using the anti-diesel valve in the carb and am using an external electronic fuel pump. Is it possible the carb could be blocked so that fuel only flows to one cylinder?

Thanks for any insight before I tear into the carb.

Scott

Vanguard 31hp problem