CS400 18″ Chain Saw
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Oil-to-gas ratioMake sure you use the right oil in your Echo CS-400 2-stroke engine. The engine needs a 50:1 ratio of gas and oil. If you put too much oil in, it will make the mix too strong and that can potentially damage your chainsaw by causing the engine to misfire and flood.
A 50:1 ratio with mid-grade (89 octane) or premium (93 octane) fuel can be used in all ECHO 2-stroke equipment, provided the oil is ISO-L-EGD and JASO M345 FD certified.
Fuel Mixture ratio 50:1 ratio with ECHO brand two-stroke oil. 89 octane unleaded. Do not use fuel containing methyl alcohol, more than 10% ethyl alcohol or 15% MTBE.
Packed with commercial-grade features for easy use and maintenance, the CS-400 includes a reduced-effort starting system and a 40.2 cc professional-grade, 2-stroke engine that delivers ample power for tough jobs.
Product Details. The ECHO Power Blend 16 oz. 2-stroke Engine Oil with Fuel Stabilizer blends with 89-octane gasoline at a 50:1 gas-to-oil ratio for clean-burning, steady performance.
Most modern chainsaws, string trimmers, leaf blowers and other small-engine two-stroke equipment recommend a 50:1 oil mix ratio, but some recommend 40:1 and older two-stroke equipment might even call for 32:1.
The fuel and oil mixture should always be 2% (50:1).
All 2-cycle chain saws use a proper mix of gas and oil – ECHO recommends a 50:1 mix which is equal to 2.6 fluid ounce of oil for each (1) gallon of gas.
Discover Relevant Questions and Answers for Your Specific Issue
the most relevant questions and answers related to your specific issue
Fuel,gas oil mixture – Echo 30.1CC Chainsaw With a 14 In.bar and Chain
ANSWER : The fuel/oil should be in the ratio 50 to 1
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Pb 2105 I need to know the fuel to oil mixture for my Echo PB-2105 blower, any ideas?
ANSWER : 50:1
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How to take out the piston in my chain saw – Echo CS400 18" Chain Saw
ANSWER : The cylinder must be removed from the crankcase (be sure to clean the exterior of the engine and all parts with compressed air first). That involves removing the carburetor, muffler, cylinder head, and possibly the entire outer case parts. If the piston/ring(s) requires replacement due to scuffing, the cylinder will likely need to be replaced also. Many modern engines use a chrome plated lining for the cylinder interior and any piston damage will affect the cylinder plating also. Use great care when installing the new piston in the cylinder as the ring(s) are quite fragile. Also look for direction marks on the piston as some engines use an offset pin. Be sure to lubricate everything as you go with saw oil to prevent start-up damage. Hope this helps!
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Cleaning the fuel filter
ANSWER : I would try cleaning the carb. sounds like there is something stuck in the jet to me.
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Echo pb-260l won’t rev up under load. like it is missing. changed plug, fuel filter, fuel line, carb. change fuel to meet precise specs. Ideas?
ANSWER : Blown moter from bad gas mixture
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After a few months stored in the garage, went to use my chain saw today. it has started ok, and the engine will rev a bit. but the chain will not turn. just saw a whiff of smoke from the area at the back of the chain, so have shut down and contacting you. Can you offer any help? I am in the UK. Thanks
ANSWER : Check to see if there is any debree in the cahin guard on the side if not the clutch will be stuck you will need to take it to a small engine repair shop make sure that the shop rate is not too high and the quality of work is good also make sure the repair does not exceed the value of the saw…if it is the clutch it should not take more than 1 hr to replace….
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Brand new Echo cs-400 chain saw: The chain spins fast on idle. Should’nt the chain be stationary on idle?
ANSWER : The manual is available here:http://safemanuals.com/user-guide-instructions-owner-manual/ECHO/CS-400-_EThe idle speed of the negine may be too high.Page 26 of the manual gives instructions for adjusting the speed with the “T” screw on the carburettor.
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SAW WONT START IT HAS FIRE TO THE PLUG AND IT WONT START WHEN I SHOOT A LITTLE ETHER IN IT
ANSWER : If the engine has good compression, and good spark, it should at least ‘pop’ several times. Check the flywheel ‘key’ as it may have sheared causing the ignition to be out of time. Hope this helps!
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