Carburetor Adjustment Husqvarna 137

Adjusting and adjusting the carburetor Husqvarna 137

Husqvarna137 Carburetor Adjustment

In the picture above, you see three adjustment screws. Each of them has its own purpose: The screw T is needed to adjust the idle speed. Screw L serves to adjust low rpm.

Screw H regulates high rpm.

The order of adjustment: First, with the screw L (rotating it), we look for the highest idle speed. After we have found them, it is necessary to return this screw a quarter of a turn against the clock hand. If in this position the chain continues to rotate, then by rotating the screw T we achieve its stop.

Then we warm up the engine at full speed in the region of 10-15 seconds and turn the screw H a quarter counterclockwise. We wait 10 seconds and listen. the engine should work as a 4-stroke in sound. If a squeal is heard, then the mixture is poor (unscrew the screw), if it smokes. Enriched mixture (tighten the screw).

After adjusting the low and high speed, we set the idle speed with screw T. This is done as follows: 1. The engine must be running 2. Turn the screw T clockwise until the chain does NOT start rotating.

3.Rotate the screw in the other direction until the chain stops.

With a properly adjusted carburetor, your chainsaw quickly picks up speed and sounds like a 4-stroke engine.

Remember that a tachometer and experience are required to properly adjust the carburetor of your chainsaw. Therefore, it is better to contact a specialized service.!

Buy carburetor Husqvarna 137 and other parts

About adjusting the chainsaw at idle speed:

Husqvarna 137. Carburetor adjustment

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Carburetor Husqvarna 137

Carburetor manufacturer. Walbro. Device type. WT-660.

Chainsaw device Husqvarna 137

When assembled on a Husqvarna 137 saw you can see:

  • Handles (front, rear and starter grip)
  • Covers (cylinder, clutch and starter)
  • Chain brake handle;
  • Tanks (for fuel and chain oil);
  • Levers (throttle, control and choke lock)
  • Ignition switch;
  • Muffler;
  • A tire with its guide and end sprocket;
  • Chain with its tension screw;
  • Protective shield for the right hand.
Carburetor Adjustment Husqvarna 137

Photo of a disassembled Husqvarna 137 chainsaw

There is a fuel and lubrication system inside the device, including a carburetor, and an ignition system.

Fuel and lubrication system for chainsaws Husqvarna 365, 372

Adjusting the carburetor of a Husqvarna 365, 372 XP chainsaw Adjusting the carburetor of a Husqvarna 365, 372 XP chainsaw means adjusting the engine to suit local conditions, such as climate, altitude, gasoline quality and type of oil for 2-stroke engines.

The carburetor is equipped with three adjustment options:

L = Low speed jet. H = High speed jet.

T = Screw for adjusting idle speed.

The L and H jets adjust the amount of fuel to match the air flow supplied by the throttle valve. If the jets are screwed in clockwise, the mixture will be lean (less fuel in relation to the amount of air), and when unscrewing the jets counterclockwise, the mixture will be richer. A lean mixture gives higher revs and a richer mixture. Lower revs. The T screw adjusts the position of the throttle at idle. If the screw T is turned clockwise, then the number of idle turns will increase, and if you turn the screw counterclockwise, then the number of turns will decrease.

Presetting and running-in chainsaw Husqvarna 372, 365 XP

When checking the operation at the factory, a preliminary carburetor adjustment was made. Pre-adjustment: H = 1 revolution, respectively L = 1 revolution. To ensure that the engine parts of the Husqvarna saws receive sufficient lubrication (break-in), the carburetor is set to a slightly increased enrichment of the fuel mixture for the first 3-4 hours of operation. For such an installation, the maximum number of revolutions is set 6-700 rpm below the recommended one. If it is not possible to check the maximum number of revolutions with a tachometer, then the H jet should NOT be set to a fuel mixture below the preset. Do not exceed the maximum number of revolutions. If the chain of the chainsaw rotates at idle, then turn the screw T counterclockwise to bring it to a complete stop.

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Fine tuning the carburetor of the Husqvarna 365, 372 XP chainsaw

After the Husqvarna 365, 372 XP chain saw has been running in, it is necessary to fine-tune the carburetor. First adjust the L jet, then the idle screw T and then the H jet. The following maximum number of revolutions is recommended: 12,500, at idle speed 700 rpm. The air filter must be clean and the cylinder cover replaced during adjustment. When adjusting a carburetor with a dirty air filter, the fuel mixture will be too lean when the air filter is cleaned or replaced next time. A too lean mixture will damage the engine. Carefully screw the L and H jets to the bottom and then unscrew them 1 turn. The carburetor is now set to H = 1 and L = 1. Start petrol dust and let it run for about 10 minutes. Place the Husqvarna 365, 372 XP chain saw on a level surface with the bar facing away from you and with both bar and chain in contact with the surface.

Low speed jet L

Find the maximum idle speed by slowly turning the low speed jet clockwise and counterclockwise. When the maximum RPM is found, return the L jet counterclockwise by 1/8. 1/4 turn.

Fine adjustment of idle speed with screw T

The idle speed setting is carried out with the screw marked with the letter T. If adjustment is necessary, the idle speed screw T should be turned clockwise until the chain does NOT start rotating. Then turn the screw counterclockwise until the chain is NOT stationary. The correct number of revolutions is considered at which the chainsaw engine works exactly in all positions with a sufficient margin up to such a number of revolutions at which the chain starts to rotate.

High speed jet H

The high speed jet H adjusts the power of the Husqvarna 372, 365 XP chainsaw and the number of revolutions. Too lean on the high speed jet will result in increased saw speed and risk of engine damage. Let the dust run at full throttle for 10 seconds. H = 1 Then turn screw H 1/4 turn counterclockwise. H = 1 1/4. Then let the saw run for another 10 seconds and listen for the difference in sound at maximum rpm. Repeat the procedure with the adjustment screw H turned 1/4 turn counterclockwise. H = 1 1/2. The saw is now running at H ± 0, H = 1/4 and H = 1/2, based on the preset. At full throttle, the engine sound will be different for each setting. The H jet is considered correctly seated when the chain saw is running with little noise at full throttle and no load. If a lot of smoke comes out of the muffler and the saw makes noise, then the mixture is too rich. Rotate the H jet clockwise until you get the correct sound setting.

Correctly adjusted chainsaw carburetor Husqvarna 365, 372 XP

The carburetor is adjusted correctly when the saw is gaining speed and when it is running quietly at full throttle without load. The chain must not rotate at idle speed. If the mixture on the L jet is too lean, it may be difficult to start the engine and the engine will not gain speed well. Setting the H jet to an excessively lean mixture will result in lower saw power, poor revs and / or engine damage. An excessively rich mixture on the L and H jets creates problems when gaining speed or gives too low operating speed.

Fuel tank block for Husqvarna 372 chainsaw, 365 XP

Drain fuel from fuel tank. Remove the cylinder cover, chain and track tire.

Unhook the throttle cable (A) from the carburetor and push the cable cover out of the mount. Remove the fuel hose (B) from the carburetor. If the saw is equipped with a handle heater, remove the cable near C. Unscrew the screws (C and D) and the travel restriction screw (E) from the clutch side of the Husqvarna 365, 372 XP. Remove the bolt from the flywheel side of the saw. Lift up some of the engine compartment using pliers and push the cable clamps off the stop contact. If the saw is equipped with a handle heating, also remove the cable clamps from the stop contact. Lift up the engine compartment and Rotate the fuel tank compartment slightly towards the flywheel so that the movement limiter is locked and released. Remove the fuel tank compartment. If necessary, unscrew the grip bracket from the fuel tank compartment. If necessary, remove the fuel hose and remove the fuel filter of the Husqvarna 365, 372 XP chainsaw. If the saw is equipped with a handle heater, remove the heater coil contact in the handle. Clean all parts and check that the fuel hose is intact. If the saw is equipped with a handle heater, install the heater coil in the handle if removed.

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Install a new fuel hose as follows: Lightly oil one half of the new fuel hose. Press the oiled section of the new hose through the hole in the fuel tank compartment. 80-85 mm should go up and out.

Rotate the hose so that it is bent upwards. Cut off a wedge-shaped portion of the hose at both ends of the hose so that the hose extends upward and outward about 70-75 mm. Remove the hose from the fuel tank and fit the fuel filter. Push the hose as far as possible. If the handle bracket has been removed, fit the bracket. Tighten the screws with a torque of 4 Nm. If the throttle lock was removed, reinstall it before assembling the fuel tank and engine compartments. Lift the engine compartment of the Husqvarna 372, 365 XP chainsaw above the fuel tank compartment and insert the fuel hose and throttle cable into their holes in the bottom of the carburetor chamber. Fit the cables for the stop contact. Bend the fuel tank compartment slightly towards the flywheel to lock the movement limiter. It is in the correct position. Fit the screw (F) on the flywheel side. Tighten the screw to 6 Nm. Fit the screws (C and D), the chain catcher and the travel restriction screw (E) on the clutch side. Tighten the screws. If the saw is equipped with a handle heater, fit the cable near C. Install the fuel hose (B) to the carburetor. Insert the carburetor into the housing and the throttle cable hooks (A) on the carburetor. Fit the cylinder cover, chain and track tire.

Chainsaw lubrication system Husqvarna 365, 372 XP

The lubrication system for the Husqvarna 365, 372 XP chainsaw consists of the following parts:

Removal and installation

Remove the following parts: Chain and track tire, Centrifugal clutch, Chain brake. Unscrew the drive wheel.

Use a screwdriver and push up the oil pipe near A. Open the pipe up and pull it out of the oil pump. Remove the two screws (B) and remove the Husqvarna 372, 365 XP chainsaw oil pump from the crankcase.

Use sharp pliers and pull out the suction hose (C) with sieve. Remove the clip (D) and Unscrew the adjusting screw (E).

Using pliers, push down on the oil pump piston near F until the plug (G) and pump piston (H) can be removed. Using pliers, remove spring (I) and 2 washers (J).

Clean all parts, including the mounting plate of the oil pump and oil hose, and check that: there is no wear on the taper of the adjusting screw (E), the eccentric plate on the pump piston (H) is free of wear, the pump piston gear is not damaged, worm gear the drive of the oil pump was undamaged, the oil hose was not dirty and the sieve was clean, the oil tube was free of contamination and that its seals were undamaged.

Insert the suction hose (C) into the hole in the crankcase. Install spring (I), 2 washers (J) and pump piston (H) in pump housing. Lubricate all parts with chain oil. Use a screwdriver and Press in the oil pump piston of the Husqvarna 365, 372 XP chainsaw and screw the adjusting screw (E) to the bottom. Fit the overlapping plug (G). Fit the clip (D). Install the oil pump in the crankcase. Tighten the screws with 5 Nm. Fit the oil pipe with gaskets. Spin the drive wheel. Fit the following parts: Chain brake, Centrifugal clutch, Chain and tire track. Adjust the pump power. Refill with chain oil and check the lubrication.

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Adjusting the power of the oil pump. The power of the oil pump is regulated by the adjusting screw (E).

Chainsaw Husqvarna 137

Chainsaw Husqvarna 137 (Husqvarna) refers to the amateur non-professional options. Light weight (4.6 kg without chain and bar) and engine power (1.6 kW) made it highly popular with consumers. For this model, 2 tire options are applicable, length 13 “and 15”. Their step is 0.325 “, and the maximum end radius. 10T. With proper operation and timely maintenance, it will last for many years. During operation, the device emits a noise of 98-108 dB.

Chainsaw Husqvarna (Husqvarna) 137. Carburetor adjustment.

The best advice that I can give you is to contact the specialists! Believe me, for very little money, specialists will adjust the carburetor, check the general condition of the saw. But if you still need to adjust the carburetor on the Husqvarna 137 saw yourself, then I will try to describe this process in detail. I also added at the end of the post how to adjust the carburetor of a chainsaw at idle.

In tuning the carburetor of the Stihl 180 chainsaw, read here: Carburetor Sthil MS180 (Stihl 180). Adjustment. No, to never heard of.

detailed instructions for adjusting the chainsaw carburetor are here: How to adjust the chainsaw carburetor step by step!

What is responsible for supplying a mixture of fuel and oil

For accurate delivery of fuel with oil, the work of the fuel pump is used, which is mechanically driven from the crankshaft. The carburetor itself is equipped with a diaphragm and a special needle valve, which are responsible for regulating the pressure in the system. Thanks to them, the correct operation of the metering chambers and the pump is organized, which improves the operation of the chainsaw.

Do-it-yourself Husqvarna carburetor adjustment?

To correctly adjust the carburetor of the chainsaw, you need to stock up on the appropriate tool in advance.

You will need the following list:

  • The most common screwdriver, with which you can unscrew or tighten the adjusting screws;
  • A tachometer designed to count the revolutions of the crankshaft. It is necessary when adjusting the idle speed, since it is quite problematic to determine the number of revolutions per minute by ear;
  • Phillips screwdriver. It is needed to be possible. Unscrew the screw (T);
  • Compressor with a special gun connected to them. The blowing device will help get rid of excess litter and dirt, since the carburetor must always be clean.

Many Husqvarna chainsaws use a special cut adjusting bolt. See in advance which ones you have installed and purchase the Corresponding kit. This will help to avoid many difficulties at the initial stage.

How to properly adjust the carburetor on a Husqvarna chainsaw

How to tune the carburetor on a chainsaw Husqvarna Chainsaw carburetor adjustment with three THL screws.

Chainsaw carburetor Husqvarna 142-136

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Chainsaw carburetor Rebir 1.4 200 UAH.

What is worth Pay attention?

Once your Husqvarna carburetor adjustment is complete, you need to make sure that the engine is running smoothly and that the saw can easily rev up and down. The idling of the chain is considered abnormal, so it is necessary to re-adjust its connection to the clutch with the screw H.

Do not forget that the unit is NOT set up immediately: you need to wait a while, as the Husqvarna chainsaw does NOT immediately react to changes in the position of the screws. This time can range from 5 to 15 seconds. This Time does not prescribe the table, so you can only find out experimentally.

If, after adjustment, a huge amount of smoke appears during operation, then the supply of the fuel and oil mixture must be adjusted. For THESE purposes, rotate the screw L.

Carburetor adjustment. Husqvarna 137-142 AntiReg!

Hare to feed the Chinese and the goons. Disassemble and clean the carburetor, change dry diaphragms, twist and.