My engine (or should I say engine accessories) had the following faults "out of the box"

1. One of the screws on the pump was cross threaded. Resolved by myself.

2. Carb low speed needle was not centred on fuel nozzle. Resolved by myself.

3. Carb fuel nozzle inlet not centred on high speed neeedle. It was drilled "off centre". Result being, the engine could not be leaned out as the high speed needle tip could not enter the orifice.

As a result the supplied carb was for all intents useless. There is no purpose to the membrane at the front of the carb. It simply acts as a seal.

I have returned the carb to HiModel with a note explaining the defects and requesting a replacement. We will see.

In the meantime to avoid owning a paperweight I am adapting a standard 46 size twin needle glow carb to work with the pump and engine. Initial running results are promising although the low speed needle on the replacement carb requires a finer taper to ensure clean transition from idle to full speed.