02-02-2023, 07:35 PM
Hi Dave
Up to around 1936 Austin used the Smiths G33 sender and a matching gauge. The sender had a resistance of near zero ohms when full and about 30 ohms when empty. The G33 sender has an oval cover plate and a side terminal, and the gauge terminals are below the centre post.
After that date they used the Smiths G35 sender which used the other sense, i.e. near zero ohms when empty and about 30 ohms when full. The G35 sender has a "rectangle with rounded corners" cover plate and an end terminal, and the gauge terminals are above the centre post. The Morris 8 also used this type of gauge.
I believe the early gauges were marked in gallons and the later ones in quarters, but I can't confirm this.
A 150 ohm sender will give you a reading that varies with fuel level, but it won't be very accurate. There is no easy way round this.
Up to around 1936 Austin used the Smiths G33 sender and a matching gauge. The sender had a resistance of near zero ohms when full and about 30 ohms when empty. The G33 sender has an oval cover plate and a side terminal, and the gauge terminals are below the centre post.
After that date they used the Smiths G35 sender which used the other sense, i.e. near zero ohms when empty and about 30 ohms when full. The G35 sender has a "rectangle with rounded corners" cover plate and an end terminal, and the gauge terminals are above the centre post. The Morris 8 also used this type of gauge.
I believe the early gauges were marked in gallons and the later ones in quarters, but I can't confirm this.
A 150 ohm sender will give you a reading that varies with fuel level, but it won't be very accurate. There is no easy way round this.