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Hi again Jeffro, I will address potential idle problems, it looks like fuel and flame were addressed below. It also looks like you have tried the carb adjustments we posted below. Look for signs of exhaust leaks like black or burn colors around the new manifold base or the pipe to manifold union etc. 1) Vacuum leaks can cause idle problems, have her at slow idle and spray WD 40 or Carb Cleaner or an unlit propane torch all around the carb especially its throtle shaft and around the manifold and carb gasket etc and if she speeds up or smoothes out,you have located the source of a vacuum leak. Make darn sure the idle stop screw goes back and bumps the lil vertical spring thingy on the carb top and thats (screw and spring) what sets the slow idle speed. You might remove the carb to governor linkage and see if you can manually make her idle better??? Let us know if so..... . The governor rod to carb linkage should be adjusted so at wide open hand throttle and wide open carb top throttle, the rod is about 1/2 hole short of dropping into the carb Is it????? ? 2) Try adjusting the timing to see if it helps, but Im thinking more of fuel or leak problems curently. 3) Inspect the air cleaner bowl for it being clean, water free and not overfilled, but I dont suspect that as a problem right now. 4) Remove the distributor cap (mag or ditstibutor) and check it for moisture, cracks, or carbon traces. That can cause all sorts of problems. 5) Clean or even replace the plugs if they are not in tip top shape and not blackened up or coated or fouled. Make sure the plug wires are wire core NOT carbon auto suppresor types. 6) Finally, I would drain the aviation gas and replace with regular 87 octane gas and let the tank and fuel system and carbs lower drain all flush out. Good Luck let is know jmn50@msn.com John T
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