Mercury Mariner 4, 5 102CC Sail 1990 Outboard Service Shop Manual, Page 21Get this manual
CPOWER TEST IMPORT ANT: Model 9800 Merc tronlc Magneto Analyzer (91 -76032) with coil selector switch set onCOlmust be used for test thru E
1T urn cu rrent control knob clockwise for maximum
read in on meter scale 1D not exceed meter range (4 amps)
2The Smm spark gap should be firing constantly3If spa rk is fai nt, intermittent or no spark occurs, the
igni ion coil is defect ive at high speed and must be rep laced
1Connect magneto analyzer test leads to ignition coil
4Turn urre nt con trol knob full cou nterclockwise nd ut selector switc to "off
5If ign iti on coil checks out K, proceed to Test "Surface Insulation Test
ESURFACE INSULATION TEST
'&CAUTION
Complete this test as rapidly as possible, as It is severe lest on Ihe coil1Remove la rge red test lead ro igh tension spark ug lead