34CS-2511T* Technical data subject to change without notice.TECHNICAL DATAMODEL CS-2511TDimension L × W × H mm (in) 243 × 205 × 196 (9.57 × 8.07 × 7.72 )Mass Power head, dry kg (lb) 2.3 (5.07) Without chain and guide barEngine Type Air-cooled two-stroke single cylinderDisplacement mL (in³) 25.0 (1.53)Carburetor Diaphragm typeMagneto Flywheel magneto: CDI systemSpark plug NGK CMR7HStarter Recoil starterPower transmission Automatic centrifugal clutchFuel Mixture ratio 50:1 ratio with ECHO Power Blend X™ or ECHORed Armor® ISO-L-EGD (ISO/CD 13738) and JASOM345-FD two-stroke, air-cooled engine oil.Gasoline Use 89 octane unleaded.Do not use fuel containing methyl alcohol, more than10 % ethyl alcohol or 15 % MTBE.Do not use alternative fuels such as E-15 or E-85.Tank capacity L (fl oz) 0.190 (6.42)Oil Bar and chain ECHO bar and chain oilTank capacity L (fl oz) 0.140 (4.73)Guide bar andsaw chainSee page 23 for Chain and Guide Bar CombinationLubrication Adjustable automatic oil pumpEngine speed IdleRPM2,800 - 3,600Clutch engagement 4,100 - 4,600Wide open throttle 12,200 - 13,400StandardfeaturesFront hand guard, Anti-vibration device,Throttle control lockout, Chain brake, Chain catcher,Spark arrestor muffler, (Kick guard),(Spiked bumper; option)WARNINGDo not store in an enclosure where fuelfumes may accumlate or reach an open flameor spark.CAUTIONDo not lend or rent your chain saw withoutthe operators manual and Safety manual.NOTICE• For future reference, you should keep thisoperators manual and the Safety manual.• If this operators manual or the Safety manualhas become illegible or is lost, please purchasea new one from your ECHO dealer.STORAGE AFTER USE• Inspect and adjust every part of the chain saw.- Completely clean every part and repair ifnecessary.- Apply thin coating of oil on metal parts toprevent rust.• Remove chain and guide bar.• Drain fuel tank, pull starter slowly a few timesto drain fuel from carburetor.• Pour a small amount of clean motor oil intospark plug hole, pull starter and crank theengine until piston reaches: TOP DEAD CEN-TER.• Store in a dry area, free from dust.