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: No-Load Test, Load Test And Lock Test Circuit Diagram

Courtesy of SUBARU OF AMERICA, INC.

1. Adjust the variable resistance with the switch on until the voltage is 11 V, and read the value displayed by the ammeter to measure starter speed. Compare these values with the standard.

   No-load test (standard): 

   Voltage/Current 

   AT model 

   Max. 11 V/90 A or less 

   MT model 

   Max. 11 V/95 A or less 

   Rotating speed 

   AT model 

   2, 000 rpm or more 

   MT model 

   2, 500 rpm or more 

2. Apply the specified braking torque to starter. The condition is normal if the current draw and starter speed are within standard.

   Load test (standard): 

   Voltage/Load 

   AT model 

   7.7 V/16.7 N.m (1.7 kgf-m, 12.3 ft-lb) 

   MT model 

   7.5 V/8.84 N.m(0.9 kgf-m, 6.5 ft-lb) 

   Current/Speed 

   AT model 

   400 A/710 rpm or more 

   MT model 

   300 A/870 rpm or more 

3. 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 

   AT model 

   3.5 V/960 A or less 

   MT model 

   4 V/680 A or less 

   Torque 

   AT model 

   31 N.m (3.2 kgf-m, 22.9 ft-lb) or more 

   MT model 

   17 N.m (1.7 kgf-m, 12.5 ft-lb) or more