Troubleshoot: Starter motor seems shorted?
Strangest thing, starter motor known to be working pre-rebuild. Now when directly connected to battery (old but charged to 13V) just makes (big) sparks like a short and doesnt move - at all.
Have disassembled and cleaned - no obvious shorts of positive to the ground. Checked continuity of windings following How to Test DC Armature | eHow and noted that all commutator points are continuous? is this right as part of the design - seems pos and neg brushes onto something thats essentially a short mightn't be the best way to design a motor!
All ideas appreciated, fustrated as its quite a simple device with so few parts. Could it be the battery? with no engine load its surprising it wouldn't spin at all.
Cheers all
XT600 3TB 1991
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