17-06-2023, 07:11 AM
A small contribution. Initial thoughts are indeed too far retarded, or air leaks. Did you check and flatten off all mating surfaces? Which carb? I ask because of my recent experience with the side draught Zenith. A combination of ageing mazak and modern petrol caused problems that were not immediately obvious. However a total strip down and serious inspection showed traces of white flakey powder in various places, nothing big enough for old fashioned jet blocking, but serious attacks with cleaner and a toothbrush restored performance. And talking of performance I must now go and fly the flag of Longbridge in an Inter Reg nav rally.