Bing 64 vent nipple position
in 912 / 914 Technical Questions
6 years ago
As stated by rotax 912 manuals the bing 64 carburetor uses a bowl vent nipple for :
1) atmosferic venting / bowl pressure reference;
2) gasoline overflow in case bowl float needle malfunctions.
But this vent nipple is located higher than carb throat/venturi/main jet etc.
It is ok for venting function, no problem.
but for overflowing function, when bowl is full, isn't more easy for fuel to spill in the throat using main jet? This is lower (and with less pressure-being in the venturi) than the higher Venting nipple at atmosferic pressure.
Even ignoring different pressures it seems basic comunicating vessel priciple.
Am i losing something? .
1) atmosferic venting / bowl pressure reference;
2) gasoline overflow in case bowl float needle malfunctions.
But this vent nipple is located higher than carb throat/venturi/main jet etc.
It is ok for venting function, no problem.
but for overflowing function, when bowl is full, isn't more easy for fuel to spill in the throat using main jet? This is lower (and with less pressure-being in the venturi) than the higher Venting nipple at atmosferic pressure.
Even ignoring different pressures it seems basic comunicating vessel priciple.
Am i losing something? .
64carb.png (You do not have access to download this file.)
