Generac — Starter Performance Test
Testing & diagnosis · Electric starter
From a Generac service manual covering: GN-190, GN-191, GN-320, GN-360. Check it applies to your exact model before use.
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Before you start
- Before removing starter, disconnect the negative battery cable from the battery.
Procedure
- Set the meter to read DC amps.
- Connect the starter motor, battery and VOM as shown.
- Insert the tachometer at the end of the pinion gear and activate the starter motor.
- A starter motor in good condition will be within specifications; if not, it should be replaced.
Tools required
- Digital multimeter (VOM) Amazon
- Tachometer capable of reading up to 1,500 rpm Amazon
- Fully charged 12 Volt battery Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Minimum motor rpm = 800
- Maximum amps = 9
- At 12 Volts DC
Source: Generac service manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.