Question about Echo CS400 18" Chain Saw

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How to reconnect fuel hosees on chainsaw cs-400

Posted by Anonymous on

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Posted on Jan 02, 2017

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SOURCE: I have a Echo chainsaw CS-400 and the carburetor has three nipples which two is on top of the carb and the other is at the bottom in a curve. which is the inlet for the fuel line with the filter

Walbro WT-820


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Posted on Apr 04, 2015

Testimonial: "So the suction side of the primer is what you're saying? And the fuel line with the filter goes to the fuel inlet?"

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SOURCE: Echo CS-400 chainsaw. I'm not understanding this diagram. I posted a picture of my carburetor earlier. Please tell me which fuel line goes to the 90° degree port on the carb? Thanks!

The vacuum side of the primer bulb goes to it.......

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Posted on Apr 05, 2015

Terry Corrow
  • 10875 Answers

SOURCE: Echo CS-400 chainsaw is it better to clean or replace the gaskets in the carburetor. .saw won't start?

replace,ethanol in the fuel eats rubber,try to use gas without ethanol

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Posted on Apr 07, 2015

irtlmn
  • 1727 Answers

SOURCE: So I replaced the carburetor, air and fuel filter, fuel lines, ignition coil, flywheel, carburetor gasket and clean the screen on the muffler, new spark plug and my Echo CS-400 chainsaw won't start

Air fuel and gas... It needs all of these

Are the crankshaft seals any good ??? This causes an air leak, leading to the engine not being able to draw in the air/fuel mixture
Check this by spraying carb cleaner into carb. Does it start ???
Did you check for spark ???
Did you set the coil gap ??? .010
Did you check compression ??? Someone mentioned 100psi. Close but most wont run under 90psi. Others need 120psi. Echo's will run under 90psi but not much lower
Did you remove the muffler and check the exhaust side of the piston ??? Scoring will keep it from running but I have seen them run, albeit poorly but still run with major scoring.
Is the spark arrestor still installed ??? Is it plugged ???

Just some of the tests I perform since I am an Echo/Shindaiwa Tech

Posted on Apr 14, 2015

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1 Answer

What is the little black hose fuel vent for on my echo CS 400 chainsaw?


To let air into the fuel tank as the fuel goes down, otherwise there would be a vacuum and no fuel supply!

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I received the cylinder assembly today. And when I opened up the package everything was there, but the ring for the piston was broken in half :


OH well free replacement is what you want then you will wait and why did you order from GREECE in the first place .

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Echo CS-400 chainsaw is it better to clean or replace the gaskets in the carburetor. .saw won't start?


replace,ethanol in the fuel eats rubber,try to use gas without ethanol

6119df52-0f5d-4ab1-ba8d-bb93ea627f4f.png


echo-cs-400-chainsaw-better-clean-or#cmnt-0-j2ewxe030upocnrrix5varvk-3-2.jpg


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echo-cs-400-chainsaw-better-clean-or#cmnt-0-j2ewxe030upocnrrix5varvk-3-4.jpg

Apr 07, 2015 | Echo Garden

1 Answer

Echo Cs-400 chainsaw. Standing the carb up with the sliver vent on top which fuel line goes to the 90° inlet on the bottom and which line from the primer bulb to the carb?


The lengths of the line and,or the bends in the line . I would say the line from the bulb would go the carb since it is used to prime or,choke the carb.

Apr 05, 2015 | Echo Garden

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Cs-302 fuel line replacement




How do I remove the Flywheel on a 1982 Echo chainsaw 302? I can't get to the fuel line since a piece got stuck under the flywheel.

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Has Ryobi RCS 3535A chainsaw a fuel bulb priming


The numbers you supply don't cross to an operators manual but that is typical of Homelite/Ryobi. I'm going to make an educated guess that it does not have a primer system. Other Ryobi saws with primer systems include it in the specification. The 3535A does not. Close scrutiny reveals no primer.
IMO fuel primers on chainsaws are one more source of problems. In the USA ethanol additives attack fuel hoses. Without a primer routing is from the fuel tank directly to the carburetor and much simpler to replace. Primers on chainsaws operate differently than 4 cycle engines too. No fuel is injected into the carburetor or engine, its only purpose is to ensure the carburetor is full of fuel,
Typical Fuel hose routing:
  • The hose in the tank with the filter on the free end connects directly to the carburetor input connection.
  • If the saw is equipped with a primer bulb, an output line from the carburetor connects to the suction side of the primer (once the bulb is collapsed it draws fuel from the tank through the carburetor to refill as it inflates).
  • The pressure side of the primer returns displaced fuel to the tank as it is depressed.
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HTH
Lou

Nov 14, 2009 | Ryobi 18-inch Electric Chainsaw Chain Saws

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