1979 Evinrude 4 HP Outboards Service Manual, PN 5424, Page 44Get this manual
LEAKAGE TEST Ignition coil and high tension leads may be tested for leakage or insulation failures using the ignition analyzerLeakage is caused by moisture, cracks in the coil housing or carbon pathsConnect the coil to the ignition tester per manufacturer instructions,Probe entire surface of the coil and high tension leads, flashover will be apparent wherever insulation has broken down Replace any coil which shows leakageSee Figure 4-30(High tension lead must be disconnected from tester
FLYWHEEL REMOVAL
'SAFETY WARNING Disconnect electrical connector between armature plate and power pack to avoid possible personal injury from accidentally starting motorSee Figure 4-7aRemove the flywheel nut using strap wrench or other suitable tool to hold the flywheelSee Figure 4-311Black tester lead 2Red tester lead 3Probe
Figure 4-30Coil Leakage Test
Figure 4-31Removing Flywheel Nut
bTo remove the flywheel install OMC Universal Puller (Special Tool No378103) to the flywheel and tighten the center boltSee Figure 4-32