Boiler stand, gas fire, and firedoor latch/catch.
The boiler will most often be fired on gas, but it is being made so that it can also use coal-wood.
So the base needs to cope with ash from coal or wood, and also have adequate clearance to fit a gas (propane) burner. And to look OK. And to be not too heavy to carry.
This is what I have come up with.
So I increased the jet diameter……
The flame size increased, but the mix did not improve. A work in progress. Another jet change, and an adjustable regulator to be tried next.
To do something positive, I made a firedoor latch and catch. Some CNC and filing.
Check your draft, your venturi that feeds the air from underneath the burner may be wrong, looking at the yellow flame.
The other issue may be that you need to have the air feeding through the base plate, with the gas.
Thanks Ian. The base is totally open so there should be no air restriction. I am thinking that the jet is too big.