An example of the quality of plastic gears occured here, two 5.5hp motors, one a Honda, and the other a Honda clone, both made in China(both were junk, not going), the Honda was quite damaged so put it aside. Got the clone going, but the govenor would not work, the plastic gear had collapsed, took the one out of the Honda, and although it had done many more hours it was just like new. The refurbished motor now runs a saw bench for cutting firewood. Just a bit OT, could not get a spark at first, then found that if the oil gets below a certain level, the ignition switches off. Ian S C