The 1929 Gardner 4L2. Geoff gives Mark and James a practical demonstration of how to start the 4L2, also describes some of the novel design features of this ground breaking design engine of 1929. | Anson Engine Museum

The Anson nearly had an embarrassing 2025 opening weekend!! The Gardner 4LW normally a reliable “start and forget” engine was over heating yesterday! It drives a 3 stage air compressor for charging the Ansons air receivers to 200psi (14bar) for starting engines that have an air start capability. Hopefully this video will explain how eventually it was sorted and might help other Gardner owners in the future. If your Gardner doesn’t warm up very fast you might have the problem of the thermostat st

The 200psi Gardner powered air compressor. The ex Gardner works 4LW that drives the Ansons 3 stage 200psi air compressor has been overheating in the hot weather! The Gardner design diverter thermostatic valve has been misbehaving! Geoff has acquired a genuine brand new thermostat for fitting. Here's how we tested it and how it diverts the engine cooling water. | Anson Engine Museum