TOHATSU BFT250A Service Manual page 305

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Check for continuity between the commutator and
armature shaft.
If there is continuity, replace the armature.
Place the armature in an armature tester (commercially
available).
Hold a hacksaw blade close to the armature core. If the
blade is attracted to the core or vibrates when the core
is turned, the armature is shorted. Replace the
armature.
OVERRUNNING CLUTCH
Check the overrunning clutch [1] for smooth axial
movement.
Clean or apply grease to the spline, if necessary.
If the overrunning clutch does not move smoothly after
cleaning or coated with grease, replace the overrunning
clutch or the gear shaft assembly.
Turn the gear shaft assembly [1] by holding the
overrunning clutch [2]. The gear shaft assembly should
turn only counterclockwise.
If the clutch turns freely in both directions or if it does
not turn at all, replace the overrunning clutch.
Check the pinion gear teeth for wear and damage and
replace if necessary.
If the pinion gear is worn or damaged, the flywheel ring
gear must be inspected (page 15-26).
STARTING SYSTEM
[1]
[2]
[1]
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