The SM 4671 is a precision-engineered Starter Drive (Self Drive) designed specifically for the New Model (N/M) variants of the GC 1000 commercial series and high-capacity Greaves Cotton diesel engines. Utilizing the robust L.TYPE architecture, this unit features an 8-tooth pinion and a high-density 12-spline internal configuration. It is precision-calibrated for the advanced gear-reduction starters required to crank modern, high-compression industrial diesel engines.