Stihl 1127 020 3003 Crankcase Assembly

The Stihl 1127 020 3003 crankcase assembly serves as the structural engine housing integrating the crankcase, fuel tank, and oil tank into a single clam-shell polymer unit. Designed for the Stihl 1127 engine series, it accommodates displacements of 56.5 cc (MS290/029) and 64.1 cc (MS390/039). The housing is molded from high-impact ABS polymer for resistance to fuel, oil, and mechanical vibration. It features quarter-turn vented caps for fuel and oil reservoirs. This assembly replaces OEM part numbers 1127 020 3003, 1127-020-3003, and 11270203003. Direct fitment confirmed for Stihl chainsaw models MS290, MS310, MS390, 029, and 039.