ST-6 STARTING SYSTEM — Starter 2. CHECK THAT FIELD COIL IS NOT GROUNDED Using an ohmmeter, check for continuity between the field coil end and field frame. If there is continuity, repair or replace the field frame. Brushes MEASURE BRUSH LENGTH Standard length: 15.5 mm (0.610 in.) Minimum length: 10 mm (0.39 in.) If length is less than minimum, replace the brush or dress with emery cloth. Brush Springs MEASURE BRUSH SPRING LOAD WITH A PULL SCALE Tension: 1.785 — 2.415 g (3.9 — 5.3 lb) If the reading is below standard, replace the brush spring. NOTE: Take the pull scale reading the instant the brush spring separates from the brush. Brush Holder CHECK INSULATION OF BRUSH HOLDER Using an ohmmeter, check for continuity between the positive and negative brush holders. If there is continuity, repair or replace the brush holder. Clutch and Gears 1. INSPECT GEAR TEETH Inspect the gear teeth on the pinion gear, idler gear and clutch assembly for wear or damage. Replace if damaged. If damaged, also inspect the flywheel ring gear for wear or damage. 2. CHECK CLUTCH Rotate the pinion clockwise and check that it turns freely. Try to rotate the pinion counterclockwise and check that it locks.