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• <br /> 4 <br /> Johnson Kart <br /> (FAif JOHNSON KART MANUFACTURING, INC. <br /> QUALITY CONCESSION KARTS <br /> 7350 NORTH 76TH STREET PHONE(414)3533969 MILWAUKEE,WISCONSIN 53223 <br /> March, 198 2 <br /> TO: Prospective Track Operators <br /> RE: Noise Level of the K91 Kohler Engine <br /> We are quoting an excerpt from a letter dated 12-1-72 <br /> from the Kohler Co., Kohler, Wisconsin as follows: <br /> ". . ..for the engine noise, I agreed to send you the <br /> noise levels we have measured on the engine running <br /> at full throttle, 4000 RPM, taken 50 feet from engine. <br /> Using our standard muffler, the noise level was 74 dba. <br /> By adapting a remote automotive type muffler (our #21413) <br /> the noise level can be reduced to 69 dba". <br /> JOHNSON KART MFG. CO.. INC. <br />