Question about Troy Bilt Tb425cs 26cc 4 - Cycle Curved - Shaft Gas Trimmer with Ez - Start and Speed Spool

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Have installed carburetor repair kit and fuel filter.Valves have been adjusted to specs.Engine will accelerate slightly but then acts as if it is starved for fuel,but will return to smooth idle when thottle is released.

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  • davidsyers May 20, 2009

    My Homelite Zipstart weed trimmer will not start. Gas flow seems to be fine, I think I'm not getting any spark. I replaced the spark plug but I'm still not able to start the engine.


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Hello rscott6687:

From your Description it Sounds like the Exhaust Port or Muffler is Restricted with Carbon Deposits, the Fuel Lines May be Reversed or the Carburetor Metering Pump Actuator Gap is Incorrectly.
>>The Following is a Basic Instruction File for Doing a Diagnostic on the Engine for this Problem. Any Input is Appreciated.
>>**Remove the Muffler and Make Sure the Exhaust Port is Clear.
>>If it is, then Try to Start the engine with the Muffler Off.
>>If it Starts and Runs Properly, then Clean the Spark Arrestor Screen in the Muffler or Replace the Muffler if Required.
Is the Fuel Line from the Fuel Filter Staying Full of Fuel?
The Carburetor Metering Jet Actuator is Set so the Pump Diaphram Dowl is Just Touching the Actuator Arm. These Components are Located Under the Cover with 4 Small Screws Holdong it to the Carburetor Body.
Please, Do Not Hesitate, If you Hit a Snag or this Does Not Correct the Problem, I am Here if You Require More Assistance.
Hope this Helps. Let me Know What Happens, Please. May the All Mighty Bless You and Yours. Be Safe and Be Happy. Thanks.

Good Luck


jbridger (John)

Posted on May 11, 2009

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