1977 Evinrude 4HP Outboards Service Manual, PN 5303, Page 36Get this manual
t 63 43101
1Stevens M.A75 or M.A80 2Stevens ST-75 3Stevens M.A14 adapter Figure 4-20Ignition Testers
4Merc-O-Tronic 5Merc-O-Tronic adapter 6Graham
If the ignition coil is good, the tester's meter will fall within the good area, with the primary circuit adjusted as specifiedConnect the test leads from the ignition tester to the coil
Connect the black lead of the tester to the orange lead of the ignition coil and the tester's red lead to the coils orangeblack stripe ground leadConnect the high tension lead of the tester to the high tension lead (secondary) of the ignition coilWith the tester set to coil index (or operating amperageMercO-Tronic illustrated) adjusted as specified, note meter readingSee Figure 4-21A low reading on the tester indicates weak coil which must be replacedA dead coil will show no readingLEAKAGE TEST Ignition coil and high tension leads may be tested for leakage or insulation failures using the ignition