Hi guys,
I have two 020 carbs, one uses a small diaphragm and gasket under a metal plate on the metering side of the carb to meter the H side fuel supply.
The diaphragm in question serves a dual purpose - it lets fuel in and as it does, it seals a drilling that is open to the venturi (it’s the vacuum created that pulls the diaphragm down).
The diaphragm I have is very worn (understatement) and I tried an AM kit as OEM is NLA, but the material is slightly too thick and it won’t close off the drilling that is open to the venturi, thus you lose all ability to tune the H - it’s constantly pig rich as it gets unmetered fuel.
My question, is it possible to do away with this diaphragm and just put some sealant over that drilling that is there to actuate the diaphragm?
The red arrow points to the drilling that is open to the venturi and the pressures in there actuate the diaphragm and opens and closes the red arrow port. That is the one I’m wondering if I can seal? The green arrow is where the fuel flows and is metered by the H needle
I have two 020 carbs, one uses a small diaphragm and gasket under a metal plate on the metering side of the carb to meter the H side fuel supply.
The diaphragm in question serves a dual purpose - it lets fuel in and as it does, it seals a drilling that is open to the venturi (it’s the vacuum created that pulls the diaphragm down).
The diaphragm I have is very worn (understatement) and I tried an AM kit as OEM is NLA, but the material is slightly too thick and it won’t close off the drilling that is open to the venturi, thus you lose all ability to tune the H - it’s constantly pig rich as it gets unmetered fuel.
My question, is it possible to do away with this diaphragm and just put some sealant over that drilling that is there to actuate the diaphragm?
The red arrow points to the drilling that is open to the venturi and the pressures in there actuate the diaphragm and opens and closes the red arrow port. That is the one I’m wondering if I can seal? The green arrow is where the fuel flows and is metered by the H needle