Question about Stihl Chainsaw 051 075 076 Drum Chain Saw Sprocket

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I have a stihl 076av all of a sudden she will not start getting plenty spark been running as should

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The fuel lines may have become airlocked.This can happen if the tank is run dry. If the saw has a primer bulb, alternatively press it several times and then try to pull start the engine with choke on. Repeat this several times. The primer bulb should feel spongy and fill with fuel.
If you're up to it, you can dismantle the carburettor and clean any dirt from valves.The carburettors on chainsaws, hedge cutters etc are very fiddly with delicate diaphragms, valves and springs so you have to be careful to avoid damage or loosing parts.
Ensure air filter is clean. Foam elements can be washed with hot water and detergent, squeezed dry in a cloth and re-oiled with a teaspoon of engine oil spread through the foam. Paper elements can be cleaned with compressed air blown from the inside of the filter but ideally should be replaced.
Check fuel lines aren't kinked or blocked restricting fuel flow.
Ensure fuel filter isn't dirty. This is probably located at the end of the fuel line in the tank.
Check the throttle cable is actuating the throttle plate in the carburettor.
Check whether there is a vent on the tank or on fuel cap. There is usually a valve on this to allow air into tank to replace fuel as it leaves for the carburettor. Ensure this isn't blocked.

Hope this helps !

Posted on Apr 07, 2011

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