DUKE'S MOLY COATED POP-UP PISTON & CYLINDER FITS STIHL MS311 MS391 49MM I EDR-210 (05001001 - 05999999) Engine

EDR-210 (05001001 - 05999999) Engine Drill

while the detergent assists in cleaner burning fuel and reliable performance

PISTON PIN BEARING

Semi-synthetic oil blend (50:1 oil to fuel mix ratio)

GT-200I (S65211001001 - S65211999999) Curved Shaft Grass Trimmer

DUKE'S MOLY COATED POP-UP PISTON & CYLINDER FITS STIHL MS311 MS391 49MM I EDR-210 (05001001 - 05999999) EngineONLY FITS MS311 AND MS391 WITH 3 BOLT INTAKE, SOME MODELS HAVE 4 BOLT INTAKE. CHECK YOUR MACHINE TO BE CERTAIN THE DUKE'S SAW SALVAGE MOLYBDENUM DISULFIDE COATED PISTON. LESS OVERALL FRICTION AND CYLINDER WALL WEAR. MOLYBDENUM DISULFIDE IS COMMONLY KNOWN AS "MOLY" OR "MOS2." AWESOME QUALITY PISTON WITH THE STIFFER CAST IRON RINGS AND BEST QUALITY PIN CLIPS. WITH PERFORMANCE POP UP PISTON! The moly coating is seen as a sacrificial lubricant and creates