1987 Johnson/Evinrude CU Outboards 35A thru 55 Service Manual, Page 133Get this manual
RPM Limiting Power Packs Power packs designated "COL" have built-in RPM limiting deviceCertain models are equipped with COL power packs to guard against possible powerhead failures caused by improper propeller selection (underpropping), excessive wear on propeller blades, improper motor installation, propeller ventilation, or unusually light boat loading Be sure to use the correct power pack when servicing the models listed below to control the engine's operating RPM range and protect it from possible powerhead damage
Model 45 Comm 55 Comm
RPM Limit
C .DIgnitions, General Information
Troubleshooting the C.DSystem The magneto powered capacitor discharge ignition system is easy to troubleshootRemember these tips to obtain fast, accurate test results1Visual InspectionCheck wiring for broken, pinched, or loose leadsConnectors should be securely fastened and free from moisture or water accumulation2Test Equipment ConditionBe sure testers are in working orderMany hours can be wasted by replacing working components needlessly3Follow ProcedureTroubleshooting can seem difficult if you vary your technique for each problem Many times items in the system are overlooked because youthought" you tested them By following the same procedure each time you troubleshoot, all items in the ignition system are sure to be tested4Test the Complete SystemThere may be occasions when more than one component is defectiveIf this condition is undetected, repeat ignition system failure may occur, or damage to replacement parts could resultTest everythingU