Bombardier SeaDoo 1989 factory shop manual, Page 93Get this manual
Section 07 ELECTRICAL Sub-section 03 (ELECTRIC STARTER)
INSPECTION
Armature
NOTEAn ohmmeter may be used the followfor ing testing procedures, except for the one concerning shorted windings in armatureCheck commutator for roughness, burnt scored suror faceIf necessaryturn commutator on lathe, enough to resurface onlyCheck commutator for mica depthIf depth is less than 0.20 mrn (I08 in), undercut micaBe sulre that no burrs are left and no copper dust remains between segments after undercutting operation ils completedCommutator undercut 20 mrn 11.008 in)
Brush Holder
Check brush holder for insulation using an ohmmeterPlace one test probe on insulated brush holder and the other test probe on brush holder plateIf continuity is found, brush holder has to be repaired or replacedBrush Length
Measure brush length If less than mrn 335 in), replace them NOTE: New brush length is 112rnm in)