Is the fuel line filter necessary for trimmer to work

buy better line. and chain link fences are ******* lines

the carby to tank
use the primer button to check lines are correct
once you get fuel in the primer
Flymo Partner Colibri SST250
trial and error

the longest hose
in tank filter line through the tank grommet to carby

short single hose
the other outlet goes from the carby back through the grommet into the upper part of the tank

http://oldmowerparts.com/McCulloch-214082-CARB-ZAMA-M1-M7-Replaces-214082-01-P2333972.aspx

http://www.ebay.com/itm/Zama-Carburetor-M1-M7-NEW-/151335732666?pt=LH_DefaultDomain_0&hash=item233c5005ba

You can probably find a Youtube demonstration video.

You may contact the manufacturer, download manuals, check fuel/oil ratios, order parts, find your local service center, and view other resources using these links:

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What is the correct fuel mixture for McCulloch products Chainsaw Trimmer...
User manuals McCulloch Service

I trust this information proves beneficial.

Obviously fuel starvation, start by replacing the fuel filter in the fuel tank on the end of the fuel hose, check the fuel lines from the tank up to the carb for signs of leaks, cracks or damage, replace if required, there is a filter in the carb itself, so the next thing is to remove and clean the carb.

Yes the 326LS is an e-tech strimmer, Fuel to oil mix ratio is 50:1

50 parts fuel to 1 part oil.

First, the primer/purge bulb does NOT have to fill completely to function. It's purpose is to remove old fue and AIR from the fuel system (carb) and move it back into the fuel tank. You normally will have an air pocket in the bulb. An air leak in the fuel system or loose carburetor screws or fuel lines in the wrong location can cause your problem. Check the fuel line and fuel filter for a good connection in the fuel tank. Remove the fuel pump cover on the carb and make sure the very small, round, wire mesh filter is not clogged with debris. When old fuel lines deteriorate, they crumble and if the filter is broken off, the fuel line to the carb will ingest bits and pieces of old fuel line. Check all these things and post back.Sometimes, if the bulb is on the carb, a check valve in the carb can stick. When you check the condition of the mesh filter inside the carb (opposite the side with the vent hole), then liberally spray with WD 40. Strong solvents and cleaners can SWELL up the tiny check valves in the carb, causing problems. So you see, it is hard to pinpoint exactly what happened without some removal of parts and diagnosis.

The smaller of the (2) lines will go to the in-tank fuel filter/weight. Depending on the model, the line will attach to the filter with about 2.5-3.0 inches of additional fuel line within the fuel tank.

The larger fuel line is the return line and needs to go into the fuel tank about 1/4 inch or so.

You should have both size holes at the bottom of the fuel tank to accommodate. Insure you are using the correct fuel line as a complete seal is necessary due to slight pressurization and to prevent leakage.

40 parts fuel to 1 part 2/stroke oil

you can get many sizes of hose at the home depot