Why does my Husqvarna 340 Chainsaw idles when L screw closed?
If your Husqvarna Chainsaw idles when the L screw is closed, it could be due to: * A worn needle valve, leaking control diaphragm/cover plate, or a needle valve assembly sticking. * A worn needle valve lever or a faulty diffuser jet.
Why is my Husqvarna Chainsaw carburettor leaking fuel?
If the carburettor of your Husqvarna Chainsaw is leaking fuel, it could be due to several reasons: * Check for a loose or faulty fuel pipe. * Inspect the diaphragm for any holes. * Examine the needle valve for wear or sticking. * Ensure the needle valve assembly is not sticking and is set at the correct height. * Look for any leaks in the metering system (air or fuel) or a loose cover on the carburettor pump side.
Why won't my Husqvarna 340 Chainsaw run at full throttle?
If your Husqvarna Chainsaw won't run at full throttle, it could be due to several reasons: * Adjust the H screw. * A blocked air filter, fuel tank vent, or fuel filter. * A blocked or leaking fuel line or impulse channel. * A loose or damaged fuel hose. * A loose cover on the carburettor pump side, or a faulty pump diaphragm. * A leaking air intake hose or loose carburettor mounting bolts. * A needle valve set too low, a damaged or incorrectly assembled metering system, or a sticking needle valve assembly. * A leaking control diaphragm/cover plate or a blocked silencer.
What to do if my Husqvarna 340 Chainsaw does not accelerate?
If your Husqvarna Chainsaw does not accelerate, consider the following potential issues: * Adjust the L and H screws. * Check for a blocked air filter, fuel tank vent, or fuel filter. * Ensure the fuel line isn't blocked and the fuel hose isn't loose or damaged. * Inspect for a blocked impulse channel. * Examine the carburettor pump side for a loose cover or faulty pump diaphragm. * Look for a leaking air intake hose or loose carburettor mounting bolts. * Verify that the needle valve isn't set too low and the metering system is correctly assembled. * Check for a sticking needle valve assembly, faulty diffuser jets, or a blocked silencer.
Why does my Husqvarna 340 engine stall when throttle is released?
If your Husqvarna Chainsaw engine stalls when the throttle is released, it might be due to: * Adjusting the L and H screws. * A faulty pump diaphragm. * A needle valve set too high or a needle valve assembly that is sticking. * Faulty diffuser jets.
What to do if Husqvarna 340 Chainsaw is flooding when engine not running?
If your Husqvarna Chainsaw is flooding when the engine is not running, it could be due to a worn needle valve, a needle valve set too high, or a needle valve assembly that is sticking.
What to do if Husqvarna 340 Chainsaw will not run at full throttle?
If your Husqvarna Chainsaw won't run at full throttle, consider the following: * Adjust the H screw. * Check for a blocked air filter, fuel tank vent, or fuel filter. * Ensure the fuel line isn't blocked or damaged. * Inspect the impulse channel for leaks or blockages. * Look for a loose cover on the carburettor pump side or a faulty pump diaphragm. * Examine the air intake hose for leaks and ensure the carburettor mounting bolts are tight. * Verify the needle valve isn't set too low and the metering system is correctly assembled. * Check for a blocked silencer. * Also, the control diaphragm/cover plate might be leaking, the needle valve assembly could be sticking, or the metering system may be damaged.
Why Husqvarna Chainsaw will not idle?
If your Husqvarna Chainsaw will not idle, consider adjusting the L screw. Other potential causes include a leaking air intake hose, loose carburettor mounting bolts, or a loose or faulty fuel hose. Check for a blocked fuel filter, fuel line, or fuel tank vent. Also, inspect for a stiff throttle valve pivot, a sticking throttle pushrod, a defective throttle return spring, or a bent throttle stop. A faulty diffuser jet could also be the reason.
Why is my Husqvarna 340 Chainsaw idling too rich?
If your Husqvarna Chainsaw is idling too rich, try the following: * Adjust the L screw. * Check for a worn needle valve or needle valve lever. * Ensure the needle valve is not set too high and that the needle valve assembly is not sticking. * Inspect for a leaking control diaphragm or cover plate.
What to do if my Husqvarna 340 Chainsaw will not idle?
If your Husqvarna Chainsaw will not idle, consider the following: * Adjust the L screw. * Check for a leaking air intake hose. * Ensure the carburettor mounting bolts are not loose. * Inspect the fuel hose for leaks or faults. * Check for blocked fuel filter, fuel line, or fuel tank vent. * Look for a stiff throttle valve pivot or a sticking throttle pushrod. * Examine the throttle return spring for defects and the throttle stop for bending. * Check for a faulty diffuser jet.
General| Cylinder Displacement | 40.8 cm³ |
|---|---|
| Weight | 4.7 kg |
| Fuel Tank Volume | 0.5 liters |
| Oil Tank Volume | 0.25 liters |
| Chain Pitch | 3/8" |
| Bar Length | 33-40 cm / 13-16 in |
Guidance on checking and maintaining safety features for safe operation.
Rules for choosing, maintaining, and using cutting equipment to minimize kickback.
Definition of kickback and techniques to avoid it, including safe cutting practices.
Instructions for mixing fuel, selecting oil, and safe fuelling procedures.
Step-by-step guides for starting cold and warm engines.
Procedure for safely stopping the chain saw engine.
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