22-04-2019, 02:15 PM
My RP saloon has had the same problem since day one. The petrol in the float camber disappears over night. The amount it loses depends (it appears) on the temperature in the garage. I have developed a cold start procedure: Prime the carb on the pump priming lever, turn the engine over a couple of times with the ignition off to prime the cylinders, ignition on, choke out and pull the starter and the engine is running by half a revolution. It seems to be a Zenith carb thing. Both the RP saloons that i have owned did the same thing. The only one that didn't was my special but that was running on 2 Solex downdrafts from a sidevalve Reliant.