Echo CS-301 - Manual (Page 10)

10
aDjustment
,
Chain tension
IMPORTANT
Always loosen guide bar nuts before turning chain
tension adjuster, otherwise clutch cover and tensioner
will be damaged.
1. Remove spark plug lead.
2. Loosen two guide bar nuts, if necessary.
3. Hold the bar nose up, and turn the adjuster screw (L)
clockwise until chain fits snugly against underside of
bar.
4. Tighten both guide bar nuts with bar nose held up.
5. Pull the saw chain around the guide bar by hand.
Reduce chain tension, if you feel tight spots.
6. When chain is properly tensioned, tighten guide bar
nuts securely - 90 – 110 kgf/cm (80 – 95 in. lbs.).
7. Keep chain properly tensioned at all times.
NOTE
All chains require frequent adjustments.
L
f
uel anD
l
ubRiCant
NOTICE: Use of unmixed, improperly mixed, or fuel older than 90 days, (stale fuel), may cause hard starting, poor
performance, or severe engine damage and void the product warranty. Read and follow instructions in the Storage
section of this manual.
fuel statement
WARNING DANGER
Alternative fuels, such as E-20 (20% ethanol), E-85 (85% ethanol) or any fuels not meeting ECHO requirements
are NOT approved for use in ECHO 2-stroke gasoline engines. Use of alternative fuels may cause performance
problems, loss of power, overheating, fuel vapor lock, and unintended machine operation, including, but not limited
to, improper clutch engagement. Alternative fuels may also cause premature deterioration of fuel lines, gaskets,
carburetors and other engine components.
GASOLINE - Use 89 Octane [R+M/2] (mid grade or higher) gasoline or gasohol known to be good quality. Gasohol
may contain up to 10% Ethyl (grain) alcohol or 15% MTBE (methyl tertiary-butyl ether). Gasohol containing methyl
(wood) alcohol is NOT approved.
Two Stroke Oil - A two-stroke engine oil meeting ISO-L-EGD (ISO/CD 13738) and J.A.S.O. FC Standards must be
used. Echo brand premium Power Blend TM Universal 2-Stroke Oil meets these standards. Engine problems due to
inadequate lubrication caused by failure to use an ISO-L-EGD and J.A.S.O. FC certified oil, such as Echo premium
Power Blend TM , will void the two-stroke engine warranty. (Emission related parts only are covered for two years, re-
gardless of two-stroke oil used, per the statement listed in the Emission Defect Warranty Explanation.)
IMPORTANT
Echo premium Power Blend TM Universal 2-Stroke Oil may be mixed at 50:1 ratio for application in all Echo engines
sold in the past regardless of ratio specified in those manuals.