Question about Husqvarna 28cc Gas Line Trimmer

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Got a husqvarna 335r,when i fill it up with fuel it runs fine but when it gets to about 3 quarters of fuel left in the tank it begins to idle and i have to keep revving it to keep it goin then it dies on me but still have 3 quarters of fuel left in the tank,when i top it back up to the top it runs perfectly fine again untill it gets back down to 3quarters of fuel,,why is it doin this,help plz

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Hi


This is happening due to adjustment of fuel supply in carburetor. You can adjust the fuel supply and air/fuel mixture as well. To adjust the fuel supply check the setting of the carburetor. Settings means that the engine is adapted to local conditions, for example, the climate, altitude, fuel and the type of 2-stroke oil. The carburetor has three adjustment controls:

L = Low speed jet
H = High speed jet
T = Idle adjustment screw

The L and H-jets are used to adjust the supply of fuel to match the rate that air is admitted, which is controlled with the throttle. If they are screwed clockwise the air/fuel ratio becomes leaner (less fuel) and if they are turned anti-clockwise the ratio becomes richer (more fuel). A lean mixture gives a higher engine speed and a rich mixture gives a lower engine speed.

The T-screw regulates the throttle setting at idle speed. If the T-screw is turned clockwise this gives a higher idle speed; turning it anti-clockwise gives a lower idle speed.

For more details please refer page# 27 in the following manual---

Husqvarna 335r Reference/Operations Manual


Hope this helps... If it does please do not forget to accept the solution or post back for assistance.


Daniel

Posted on Aug 06, 2010

  • rapper x Aug 06, 2010

    hi daniel thnax for quick response,,,if its cutting out after using a quarter of fuel which way do i need to turn screws and which ones,,thanx again

  • Daniel Scott
    Daniel Scott Aug 06, 2010

    hi daniel thnax for quick response,,,if its cutting out after using a quarter of fuel which way do i need to turn screws and which ones,,thanx again



    Hi



    You'll neeed to turn L and H screws, if they are screwed clockwise the air/fuel ratio becomes leaner (less fuel). Please check the manual for the diagram(check page# 27)--





    Husqvarna 335r Reference/Operations Manual



    And, if you want to change the throttle setting of idle speed then you can change the T-screw setting. If the T-screw is turned clockwise this gives a higher idle speed; turning it anti-clockwise gives a lower idle speed.



    Hope this helps... If it does please do not forget to accept the solution or post back for assistance.


    Daniel

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