This 93 Legacy L 2wd 5spd w/ +180Kmi had trouble since last year starting the car. Last year refurbished the starter solenoid contacts. Filed the contacts with an emery board. The car started well after that. Then 7 months later again trouble starting the car once more. The solenoid still was clicking as it should but starter motor failed to engage on most tries. The car would eventualy always start.   This year disassembled the starter commutator and brushes assembly. Cleaning the commutator