My 77 rude is now running great. It starts super easy when cold as in unloading from trailer in morning. After motoring around and shutting it down it will pop while cranking but not run. Primer bulb is tight. Choked or not the only way I can start it is spraying a little ether in the carbs. At that point it fires right away and runs great again. Any ideas would be great. Thanks in advance.