2006-2010 Suzuki DF150 / DF175 4-Stroke Outboards Service Manual, Page 158Get this manual
ENGINE ELECTRICAL
INSPECTION AND SERVICING Armature and Commutator Inspect the commutator surfaceIf surface is gummy or dirty, clean with #500 grit emery paper A
Measure commutator outside diameter! 09900-20101: Vernier calipers Commutator outside diameter: Standard: 29.0 mm (1.14 in) Service limit: 28.0 mm (1.10 in) If measurement exceeds service limit, replace armature
Check that mica (insulator) between the segments is undercut to specified depthCommutator undercut 1: Standard: 0.5 0.8 mm (0.02 0.03 in) Service limit: 0.2 mm (0.01 in) If measurement exceeds service limit, cut to specified depthNOTE: Remove all particles of mica and metal using compressed air( Wear safety glasses when using compressed air Check for continuity between the commutator and the armature coreshaftReplace armature if continuity is indicated! 09930-99320: Digital testerTester range:(Continuity)