56
Starter System
KohlerEngines.com
22 690 01 Rev. --
Inertia Drive Starter Tests
NOTE: Please perform following testing as near to conditions during failure.
Before Starting
● Disable ignition system: disconnect spark plug lead from spark plug, then ground spark plug lead to engine block
using mechanical means.
● Battery voltage should be tested and must be at 12.4 VDC or higher. Do not proceed if battery voltage is less than
12.4 VDC as battery should be charged.
● Test meter leads before use. (Set meter to Ohms and check for resistance reading of less than 0.5 Ohm.)
● If available, use clamping meter leads to assist with testing.
● Set meter to next highest voltage scale that includes 12 VDC.
● When taking readings, allow meter to stabilize before recording. Reading should stabilize after 3 to 5 seconds. If
reading continues to drop while cranking, stop test and perform a battery load test.
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D
E
A
C
B
F
D
D
E
G
H
I
J
K
A
Test #1
Battery Voltage Test
(Static)
B
Test #2
Voltage Drop Across
Battery (Cranking)
C
Test #3
Voltage Drop Across
Starter (Cranking)
D
DVOM
E
Battery
F
Starter
G
Touch meter leads
to actual battery
terminals.
H
Use starter end plate
as test point.
I
Test #1 Results
J
Test #2 Results
K
Test #3 Results
Test 1 Conclusions
•
If battery voltage is above 12.4 VDC continue to Test 2.
•
If voltage is below 12.4 VDC, charge battery and retest.
•
If battery will not hold a charge it should be replaced before continuing test or replacing starter.
Test 2 Conclusions
•
If battery cranking voltage is above 9.0 VDC continue to Test 3.
•
If battery cranking voltage is below 9.0 VDC you should check battery by using a load tester. Also check for external
engine load.
Test 3 Conclusions
•
If diff erence between test 2 and test 3 is greater than 1 VDC check all positive and negative electrical connections
for corrosion and/or loose fasteners in starter circuit.
