1. Scope--This SAE Recommended Practice establishes equipment and test procedures for determining the performance of spark arrester exhaust systems of multiposition engines used in hand-held portable applications. It is not applicable to spark arresters used in vehicles or stationary equipment.

1.1 Purpose--This document provides a method of testing to evaluate the fire ignition potential of exhaust systems of small multiposition portable engines.

1.2 Performance--Recommended performance criteria are given in Appendix A which are adequate for the severe fire hazard condition posed by heavy vegetative fuels. However, during periods of extreme fire danger, exhaust systems meeting this document may not give absolute protection against fires. Additional control of operations may be necessary during such periods.

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