1963-1973 Mercruiser all Engines and Drives Service Manual Books 1 and 2, Page 183Get this manual
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COMPONENT CHECKS ARMA UR E
F IE LD COIL EST FOR GROUND
ARM AT URE TEST OR GR OUND
ia ne An alyze elet:tor witch set on ca i'lo3 (Con in uity) (or usin g, VOA es te-91-2