Use and Care Manual
12
CS-620P
 WARNING
Alternative fuels, such as E-15 (15 % 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, carburetor 
and other engine components. 
IMPORTANT 
• ECHO brand 2-stroke oils may be mixed at 
50:1 ratio for application in all ECHO engines 
sold in the past regardless of ratio specifi ed in 
those manuals. 
• 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 Mix Chart 50 : 1
U.S. Metric
Gasoline Oil Gasoline Oil
Gallons US. fl. oz. L mL
1 2.6 5 100
2 5.2 10 200
5 13 25 500
FUEL AND LUBRICANT
FUEL STATEMENT
Gasoline - Use 89 Octane [R+M/2] (mid grade or 
higher) gasoline known to be good quality. Gasoline 
may contain up to 10% Ethanol (grain alcohol) or 
15% MTBE (methyl tertiary-butyl ether). Gasoline 
containing methanol (wood alcohol) is NOT ap-
proved. Use of ECHO branded fuel is recommend-
ed to extend engine life in all air-cooled 2-stroke 
and 2/4-stroke hybrid engines. 
Two-Stroke Oil - A two-stroke engine oil, such as 
ECHO branded 2-stroke oils, meeting ISO-L-EGD 
(ISO/CD 13738) and J.A.S.O. FD Standards must 
be used. ECHO branded 2-stroke oils meet these 
standards. Engine problems due to inadequate 
lubrication caused by failure to use an ISO-LEGD 
(ISO/CD 13738) and J.A.S.O. M345-FD certified oil 
will void the two-stroke engine warranty. 










