Here's the first test of the new Changfa R175 CHP unit.
Gave me something to do during lockdowns

Some features/changes to the original engine.
- Larger and better quality air filter
- Machined an adapter to divert oil from the internal screen to an external filter.
(This increases the oil capacity by almost 1 litre)
- Removed the hopper cooling system and replaced it with a pump driven closed circuit
loop which passes through a flat plate heat exchanger allowing heat to be removed to a useful application.
- Installed a lighter throttle lever spring which seems to allow the governor to be more sensitive at the lower rpm.
The unit is currently designed to run continuous at 1100 rpm. In this test it is loaded to 900 watts with an electric heater.
At 1500 watts the engine bogs down so I suspect the 900 watt load is approximately 85% of full load.
https://youtu.be/8yGpl7Dmvas