1997 Johnson Evinrude "EU" 90 thru 115 90 CV Service Manual, P/N 507267, Page 94Get this manual
About This Section The information in this section of the Service Manual has been organized into format that will allow the technician to make maximum use of his troubleshooting timeTo be most effective, the technician should read and understand these statements before proceeding1To save time, routine service information has been covered in the first pages of this sectionIt includes: brief review of the principles of operation for CNC's CD ignition system, Page 3-12 listing of available troubleshooting test equipment, Page 3-15 brief review of spark plug information, Page 3-7 Servicing flywheels, flywheel and crankshaft tapers, Page 3-8 Flywheel Nut Torque Chart, Page 3-9 review of all testing procedures for ignition coils, Page 3-10 An Ignition Coil Specification cha rt, Page 3-102If you are working on an engine where the ignition problem makes the engine very hard to start or impossible to start, begin your testing with Output Tests, Page 3-253If you are working on an engine where the ignition problem creates an intermittent high-speed miss or inconsistent running qualities above cranking RPM, refer to two areas in this section: Indexing Flywheel, Erratic Ignition to check for misfiring or double-firing power pack, Page 3-22 StepRunning Output Test, Page 3-34