Can anybody explain what happens in the device below which is part of the air intake to the right hand carb. There are two small pipes which connect via hoses. The right hand one in brass provides a vacuum to the preheat system and a thermostat cuts it off at a preset temperature. The other one in black plastic connects to the central idling manifold under the air filter box. It doesn't seem to have any thermostatic control. But what function does it serve? Both ends of the pipe seem to lead to a vacuum. Any ideas?
have a read through this - https://thelatebay.com/index.php?threads/oil-bath-air-cleaners.73774/ system is basically the same
Aha that makes sense - I was assuming that the entire vacuum was coming from the air being sucked into the carb, but it's not. It's mainly a through run from the idling system. I'm reposting a very helpful diagram that you gave us back in 2019. Many thanks.
That’s the image I was hoping you would see found it somewhere in Russian, and one of the lads at work is Lithuanian and assisted in the translation. Last time I checked the flap is still working
