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Husqvarna 340 - User Manual

Husqvarna 340
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340/345/350
CRAFTSMAN 359.35274
Operator's manual (CARB, EPA)
Please read these instructions carefully and make
sure you understand them before using the saw,
101 90 07-95

Table of Contents

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Preview: Workshop Manual
Workshop Manual52 pages
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Basic Adjustment4 pages

Questions and Answers

  • A
    Adam RobertsSep 23, 2025
    Why my Husqvarna Chainsaw does not accelerate?
    • R
      Ryan WigginsSep 23, 2025
      If your Husqvarna Chainsaw does not accelerate, try the following: * Adjust the L and H screws. * Check for blocked air filter, fuel tank vent or fuel filter. * Ensure the fuel line is not blocked or damaged. * Inspect the impulse channel for blockages. * Check for a loose cover on the carburettor pump side or a faulty pump diaphragm. * Look for leaks in the air intake hose and ensure the carburettor mounting bolts are tight. * Verify the needle valve isn't set too low and the metering system is correctly assembled. * Also, the needle valve assembly could be sticking or the diffuser jets may be faulty.
  • J
    jordanjonesAug 25, 2025
    Why is my Husqvarna Chainsaw carburettor leaking fuel?
    • M
      Mr. Robert Farley MDAug 25, 2025
      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.
  • S
    stephensleslieAug 25, 2025
    Why won't my Husqvarna 340 Chainsaw run at full throttle?
    • S
      smithkristinAug 26, 2025
      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.
  • J
    joydavisAug 27, 2025
    What to do if my Husqvarna 340 Chainsaw does not accelerate?
    • J
      James DiazAug 27, 2025
      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.
  • M
    Maureen PhillipsSep 23, 2025
    What causes over rich acceleration in Husqvarna 340 Chainsaw?
    • L
      Latoya JacksonSep 23, 2025
      If your Husqvarna Chainsaw has over rich acceleration, try adjusting the L and H screws. Other potential causes include a blocked air filter, a faulty pump diaphragm, or faulty diffuser jets.
  • E
    Evelyn SimonSep 13, 2025
    What to do if Husqvarna 340 Chainsaw is flooding when engine not running?
    • A
      Anthony BrownSep 13, 2025
      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.
  • J
    Julie JonesSep 12, 2025
    What to do if Husqvarna 340 Chainsaw will not run at full throttle?
    • C
      Cynthia FosterSep 12, 2025
      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.
  • D
    Dawn BradfordSep 12, 2025
    Why Husqvarna Chainsaw will not idle?
    • T
      tammy77Sep 12, 2025
      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.
  • H
    Heather BrownSep 4, 2025
    Why is my Husqvarna 340 Chainsaw idling too rich?
    • A
      Angel HernandezSep 4, 2025
      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.
  • C
    Charles WaltonSep 1, 2025
    What to do if my Husqvarna 340 Chainsaw will not idle?
    • B
      Brian McdonaldSep 1, 2025
      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.

Summary

SAFETY INSTRUCTIONS

Personal Protective Equipment

Chain Saw Safety Equipment

Chain Brake and Front Hand Guard

Throttle Lock and Other Safety Devices

Inspecting Safety Equipment

Guidance on checking and maintaining safety features for safe operation.

Cutting Equipment Safety

Rules for choosing, maintaining, and using cutting equipment to minimize kickback.

Kickback Avoidance and Techniques

Definition of kickback and techniques to avoid it, including safe cutting practices.

General Safety and Operation

ASSEMBLY

Mounting Guide Bar and Chain

FUEL HANDLING

Fuel Mixing and Fuelling

Instructions for mixing fuel, selecting oil, and safe fuelling procedures.

START AND STOP

Starting Procedures

Step-by-step guides for starting cold and warm engines.

Stopping Procedure

Procedure for safely stopping the chain saw engine.

MAINTENANCE

Carburetor and Air Filter Maintenance

Spark Plug and Lubrication System Maintenance

Husqvarna 340 Specifications

General IconGeneral
Cylinder Displacement40.8 cm³
Weight4.7 kg
Fuel Tank Volume0.5 liters
Oil Tank Volume0.25 liters
Chain Pitch3/8"
Bar Length33-40 cm / 13-16 in

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