Hi Kye & Jack,
It's a great little mower, the fuel tank holds about 1.5 litres of fuel. I reckon you would need that much as well to mow the average 50's lawn. Jack the engine is the Tor 75cc, if your ever up close you can tell the difference by counting the cooling fins between the head bolts.
The 49 cc has 4 fins between the bolts and the 75cc has 5 fins. The carby is giving me grief though, can't seem to get the tickler to work. When cold you fill the fuel bowl then pull up the tickler for about 20 seconds 3 times. This should allow fuel to flow up the main jet and into the carb throat giving a rich mixture for starting.
Can't see this happening, need to find some service info on the Amal carb especially the float setting. The inlet manifold has an extension which is held on by a screw, not the best method. I will have to think about sorting it out.