What causes too much fuel at idling on Husqvarna 140?
If there's too much fuel at idling on your Husqvarna Chainsaw, it could be due to a needle valve set too high, a needle valve assembly sticking, a damaged metering system, a worn needle valve, a leaking control diaphragm/cover plate, or a metering system incorrectly assembled.
What to do if my Husqvarna 140 Chainsaw does not accelerate?
If your Husqvarna Chainsaw isn't accelerating, try the following: Adjust the L and H screws. Check for blockages in the air filter, fuel tank vent, or fuel filter. Also, inspect the fuel line and fuel hose for damage. Other potential issues include a blocked impulse channel, loose cover on the carburettor pump side, a faulty pump diaphragm, a leaking air intake hose, loose carburettor mounting bolts, incorrect needle valve setting, a misassembled metering system, sticking needle valve assembly, faulty diffuser jets, or a blocked silencer.
Why my Husqvarna 140 will not run at full throttle?
If your Husqvarna Chainsaw won't run at full throttle, consider these possible solutions: Adjust the H screw. Check for blockages in the air filter, fuel tank vent, or fuel filter. Inspect the fuel line and fuel hose for damage. Also, look for a leaking or blocked impulse channel, a loose cover on the carburettor pump side, a faulty pump diaphragm, a leaking air intake hose, loose carburettor mounting bolts, a needle valve set too low, a damaged or incorrectly assembled metering system, a leaking control diaphragm/cover plate, a sticking needle valve assembly, or a blocked silencer.
General| Cylinder Displacement | 40.9 cm³ |
|---|---|
| Weight | 4.4 kg |
| Oil Tank Volume | 0.25 l |
| Bar Length | 14 in |
| Fuel Tank Volume | 0.37 l |
| Chain Pitch | 3/8 inch |
| Chain Gauge | 0.050 inch |
Overview of the workshop manual's purpose and content.
Essential safety precautions and warnings for repair work and chainsaw use.
Identifies the intended audience for the workshop manual.
Information on how modifications affect service documentation over time.
Specifies the requirement for special tools and lists available service tools.
Explains how to use the workshop manual for repairs.
Describes the referencing system used for components and figures.
Provides general guidelines for workshop safety and manual usage.
Highlights specific warnings and precautions for operating the chainsaw.
Explains symbols found on the chainsaw itself.
Explains warning and instruction symbols used within the manual.
Illustrates and lists special tools required for chainsaw maintenance.
Step-by-step instructions for disassembling the chain brake mechanism.
Procedures for correctly reassembling the chain brake.
Instructions for removing the silencer unit.
Instructions for refitting the silencer unit.
Guide for replacing the chain catcher component.
Steps for dismantling the engine's start/stop control system.
Procedure for testing the stop switch via resistance measurement.
Instructions for reassembling the start/stop control system.
Steps for removing the throttle lock, trigger, and return spring assembly.
Procedures for refitting the throttle lock, trigger, and return spring.
Detailed steps for removing the starter assembly from the chainsaw.
Procedure for replacing a damaged or worn starter cord.
Method for correctly tensioning the recoil spring in the starter.
Instructions for replacing a worn recoil spring.
Steps for refitting the starter assembly.
How to test the ignition module for faults.
Procedures for removing the ignition module and flywheel.
Steps for refitting the ignition module and flywheel.
Instructions for removing the centrifugal clutch.
Procedures for refitting the centrifugal clutch.
Steps for dismantling the oil pump and its screen.
Procedures for assembling the oil pump and its screen.
Instructions for removing the air intake system components.
Procedures for assembling the air intake system.
Comprehensive guide to the chainsaw's carburettor, including design, function, and maintenance.
Instructions for dismantling and venting the fuel tank unit.
Procedure for testing and ensuring proper venting of the fuel tank.
Details on dismantling, cleaning, inspecting, and assembling the vibration damping system.
Steps for replacing the fuel filter.
Instructions for replacing the fuel and return hoses.
Procedures for replacing the air-purge component.
Steps for removing the piston and cylinder assembly.
Procedures for refitting the piston and cylinder assembly.
Method for pressure testing the cylinder for leaks.
Instructions for dismantling the complete crankshaft.
Procedures for replacing the crankshaft bearings.
Steps for reassembling the complete crankshaft.
Guide for repairing damaged threads using a repair kit.
Instructions for replacing the front and rear bar bolts.
Identifies common chainsaw faults and their likely causes.
Outlines additional troubleshooting procedures for specific components.
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