..The engines and equipment were sold to businesses and individuals through Wood Sales Company Inc. and Tool Mart, Inc. The engines and equipment were not covered by certificates of conformity because they were different models, had different power ratings, or were made by a different manufacturer than the listed on the certificate...
Betcha a dollar that the OE importers signed contracts for certified engines, and the suppliers shipped whatever they felt like that looked similar and fit. That's just a wild a$$ guess though. Definitely not saying that's SOP, or anything. Nope.
When you do business with the Chinese, you pays your dollars you takes your chances...............