Suzuki DF25/DF30 Four Stroke Service Manual, Page 87Get this manual
ELECTRICAL 4-17 Check for continuity between the commutator and the armature coreshaftReplace armature if continuity is indicatedCheck for continuity between the adjacent commutator segmentsReplace armature if no continuity is indicated09930-99320Digital tester Tester range(Continuity)
Armature core Commutator Shaft
BRUSHES Check the length of each brush09900-20101Vernier calipers Brush length: Standard12.5 mm (0.49 in Service limit9.0 mm (0.35 in If brushes are worn down to the service limit, they must be replacedBRUSH HOLDER Check brush holder continuity09930-99320Digital tester Tester range(Continuity)