The MS 211 uses advanced technology in the form of a powerful, fuel-efficient, low exhaust emission engine, but it doesn’t stop there. It also reduces your maintenance with a professionally inspired pre-separation air filtration system (extending air filter life up to five times longer). Features STIHL ElastoStart™ Ematic™ Lubrication System STIHL Quickstop® IntelliCarb™ Compensating Carburetor POWER SOURCE Gas POWERHEAD WEIGHT 9.5 lbs. GUIDE BAR LENGTH (Recommended) 18 in. OILOMATIC® CHAIN 3/8" PM3 CHAIN OIL CAPACITY 9.0 oz. ENGINE POWER 2.3 bhp FUEL CAPACITY 9.1 oz. DISPLACEMENT 35.2 cc INTENDED USE Homeowner Note: STIHL recommends #3636 (63 PM3 61) OILOMATIC® saw chain and 18" 3005 000 4817 Ematic™ guide bar combination. The actual listed guide bar length can vary from the effective cutting length based on which powerhead it is installed on.