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.

1. No-load test

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

   No-load test (Standard): 

   Voltage/Current 

   MT model Max. 11 V / 95 A 

   AT model Max. 11 V / 90 A 

   Rotating speed: 

   MT model More than 2,500 rpm 

   AT model More than 2,000 rpm 

2. Load test

   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: 

   MT model 7.5 V / 8.84 N.m (0.90 kgf-m, 6.5 ft-lb) 

   AT model 7.7 V / 16.7 N.m (1.70 kgf-m, 12.3 ft-lb) 

   Current/Speed: 

   MT model 300 A/870 rpm or more 

   AT model 400 A/710 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 

MT model 4 V / 680 A or less 

AT model 3.5 V / 960 A or less 

Torque: 

MT model 17.0 N.m (1.73 kgf-m, 12.5 ft-lb) or more 

AT model 31.0 N.m (3.16 kgf-m, 22.9 ft-lb) or more