I've just been back yard running my two 3w-50i motors to make sure they are working before I put them in a plane. Both carbs were bone dry and I had to take the diaphrams out and moisten them before they would draw fuel. 3W also recommends sealing the carb block to the crankcase with anerobic sealer. I've got both running now but one is missing at full throttle, and is about 300 rpm less than the other. Anybody got any ideas? I've already replaced the plug and cleaned the carb screen.
Sam