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Echo cs8000 Hi. I have aproblem with my saw. The bore and piston were badly scored so I replaced them. The saw goes to fire after about three pulls with the choke. I push the choke in and then it will start. It will idle and rev, but only for about 10 seconds. It seems to run out of fuel. You can repeat the same stsrting sequence over and over and the same thing happens. I have checked the fuel hose and strainer in the tank. I have dismantled and checked the carby and no obvious problems, The hose from the crankcase is connected but I dont know how to test any further. Any help or suggested would be appreciated as I love the Saw but I might look at a divorce the way things are going. Regards Matthew

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The solution to the fuel starvation problem with the Echo 8000 is based on the metering diaphragm. In late 2007, Walbro sold off a huge amount of carb kits which were not ethanol compliant. These kits were purchased by resellers like Stens. Now that many states have ethanol blended gasoline, the metering diaphragm dissolves and hardens in the presence of the added ethanol. You will need the walbro carb kit with a 'new' metering diaphragm that is not sensitive to alcohol or mtbe which is the summer fuel additive also in alot of areas. Each kit comes with a date on the package, use Walbro K22-HDA manufactured after 06-2008. I run these saws that is how I know.

Posted on Aug 31, 2009

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Check the fuek lines for hole and leaks, check the fuel filter and clean if necessary. remove the carbuerator and inspect the gasket; it should be soft and flexible, if it seems hard or brittle replace it. clean the carb with carb cleaner sray (available at any local auto parts store) and compressed air. make sure you get inside the small fuel rail holes. also check the primer bulb for pin holes and proper seating/seal. if that doesn't work have the carb repaired at a service center or replaced.

Posted on Nov 29, 2008

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take the muffler off - have a look at piston / rings and bore , i suspect you did not put enough oil in the petrol or forget to put oil in petrol and ran on straight fuel or on a very very lean oil mix

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hi there

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you will have damaged the piston / rings / bore - do a compression check - if its quite low
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hi there chris

pauly 46 here

if you have taken the starter cover off and the chain and bar are off and the flywheel will still not move

take the muffler off and the carby off too and have a look at the piston and bore if they are scored deeply on the intake and ex side and the bore has damage as well - it sounds like you mave have runn the unit with not enough oil in your mix or you used stale fuel

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either way repair could be expensive- might pay to think about new saw because to me thats what is sounds like !

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