<Li> 1940 - Yamaoka Internal Combustion Machines amalgamates with Yamaoka Engine Workshop . </Li> <Li> 1952 - Company name changes to Yanmar Diesel limited . </Li> <Li> 1992 - Yamaoka Magokichi sets up business with small tractors . </Li> <Li> 1992 - Company name changes to Yanmar Diesel limited . </Li>

When did john deere start using yanmar engines