Just curious what manufacturer is the closest to the older engines. Politely asking if they are a knockoff of someone else or if their complete design. Either way, with 700 hrs. on mine, I’m still impressed with my 07 284.
The engine in my 2007 554 Jinma is the Fujian Lijia SL4105ABT and it runs well. Don’t have too many hours on mine as I use it mostly in the winter for snow clearing etc. I don’t know if the engine design is original or not, but it sure does work well.
I have a Quanchai 3 cyl in my 12/07 Jinma 284, no problems so far, but I only have 120 hours on it. I’d want at least 1,000 hours before I’d comment on dependability. One observation, a mechanic friend of mine commented that the injection pump is a clone of the Bosch pump on his 1967 Mercedes.