+2 to NormK.
I wonder when the consumer is going to learn that buying cheap means it is disposable item. Lately I have been getting those type of equipment brought in the shop and it just a complete waste of my time. Most time I just refuse to even bother with them. Even being fairly good at creating miracle repairs by making custom fabricated parts some things are beyond even us magicians. I still haven't got the lead to gold thing working.
These engines are usually made by fly by night companies meaning they make a lot product and then just disappear on paper before anyone need repairs.