Fuel tank vent problem-HELP!

[carvinmark]

Recently my cs346 echo has been getting harder to start and keep running.I put new plug,fuel filter and air filter.This saw is a year old and always ran like a top.Yesterday,after exhusting myself trying to start it,I noticed when I remove the gas cap there is a lot of vacumn in the fuel tank.After I put the fuel cap back on it will briefly start and stall like it isn't getting fuel.I took cap back off and vacumn again.I think it must be a vent problem?Can anyone help me?How is it vented?What should I do?Thanks for any help.

 

[Kneejerk Bombas]

http://www.echo-usa.com/oot/docs/CS346_092804.pdf
This should help you out.

 

[HiOctane]

Check the vent on top of the tank,probably sticking or blocked.Check [URL="http://www.echo-usa.com/oot/docs/CS346_092804.pdf"]here[/URL] in the fuel system section,item #1,thats the valve giving your problem.Im not sure,she probably split in two parts,so you can see inside whats wrong.

 

[carvinmark]

Thanks Mike,
Echo doesn't tell you where it is or how to get at it.

 

[carvinmark]

HiOctane,
You wouldn't belive what I went thru to get at the vent valve.After a dissambly of my saw,almost completely,I found the valve after I pulled the flywheel off. It is running great now. Thanks for the help.