This standard specifies the technical requirements, test methods, inspection rules, packaging and storage of exhaust mufflers. This standard is applicable to small gasoline engines, and other gasoline engines can be used as a reference.
JB/T 5137-1991 history
2014JB/T 5137-2014 Exhaust silencers of general utility small gasoline engines.Specification
1991JB/T 5137-1991 Exhaust silencers of small gasoline engines - Specification