Performance Test

The starter should be submitted to performance tests whenever it has been overhauled, to assure its satisfactory performance when installed on the engine.

Three performance tests, no-load test, load test, and lock test, are presented here; however, if the load test and lock test cannot be performed, carry out at least the no-load test.

For these performance tests, use the circuit shown in figure.

Fig 1: Testing Load And Lock

Courtesy of SUBARU OF AMERICA, INC.

1. No-load test

   With switch on, adjust the variable resistance until the voltage is 11 V, read the value of ammeter to measure rotating speed. Compare these values with the standard.

   No-load test (standard): 

   Voltage/Current 

   Max. 11 V/90A or less 

   Rotating speed 

   More than 1,720 rpm 

2. Load test

   Apply the specified braking torque to starter. The condition is satisfactory if the current draw and rotating speed are within specifications.

   Load test (standard): 

   Voltage/Load 

   8 V/12.78 N.m (1.30 kgf-m, 9.4 ft-lb) 

   Current/Speed 

   370 A/850 rpm or more 

3. Lock test

   With the starter stalled, or not rotating, measure the torque developed and current draw when the voltage is adjusted to standard voltage.

   Lock test (standard): 

   Voltage/Current 

   3 V/900 A or less 

   Torque 

   15.42 N.m (1.57 kgf-m, 11.3 ft-lb)