1993 Johnson Evinrude "ET" 90 degrees CV Service Manual, P/N 508285, Page 99Get this manual
RPM Limiting Power Packs Power packs designated "CDL" have built-in RPM limiting deviceCertain models are equipped with CDL power packs to help prevent powerhead failures caused by improper propeller selection (underpropping), excessive wear on propeller blades, improper motor installation, propeller ventilation, or unusually light boat loadingBe sure to use the correct power pack when servicing the models listed below to control the engine's operating RPM range