Yamaha 5TE-F8197-10 Checking the Starter Motor, Outside diameter 28 mm 1.10 Wear limit 27 mm 1.06

ELECTRIC STARTING SYSTEM

ELEC

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CHECKING THE STARTER MOTOR

1.Check:

●Commutator

Dirty → Clean it with #600 grit sandpaper.

2.Measure:

●Commutator diameter a

Out of specification → Replace the starter motor.

Outside diameter: 28 mm (1.10 in)

<Wear limit:> 27 mm (1.06 in)

3.Measure:

●Mica undercut b

Out of specification → Scrape the mica using a hacksaw blade.

Mica undercut: 0.7 mm (0.03 in)

NOTE:

Scrape the mica to the proper measurement using a hacksaw blade which has been grounded to fit the commutator.

4.Check:

●Armature coil (insulation/continuity) Defects → Replace the starter motor.

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Checking steps:

●Connect the pocket tester for the continuity check 1 and insulation check 2.

●Measure the armature resistances.

Armature coil resistance: Continuity check 1:

0.025 ~ 0.035 Ω at 20 °C (68 °F) Insulation check 2:

More than 1 MΩ at 20 °C (68 °F)

●If the resistance is incorrect, replace the starter motor.

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