How to regulate throttle in a patriot 240 saw


Taiga 245 is a modern chainsaw made of shockproof plastic. Not afraid of falls, medium impact, t.к. Most of the components are made of metal. It is worth noting its large weight. 8.95 kg not including fuel. Similar saws weigh significantly less.

Saws dimensions: 900 x 280 x 300. Comes complete with a 40 cm guide bar and 9.3 mm pitch chain.

The TAYGA chainsaw is based on a 2-stroke gasoline engine with 2,6 kW output, which is achieved by rotation of the crankshaft at 7000 rpm. Working volume is 75 cubic centimeters. The piston cylinder is not hardened, which reduces the service life of the saw. This criterion is important for longer workloads where the saw has to operate for a long time under load, almost without stopping. In domestic applications, it is not critical whether the piston is hardened or not. Piston size is 50 mm in diameter. The manufacturer recommends to use the chainsaw not more than 40 minutes, after this time the tool should have a rest.

The chainsaw is safe for the environment when used with special-purpose oils.

Tiga 245 uses universal motor oil for both chain and engine. Diluted in proportion of 1 to 20. Yes, that’s right, 1/20 is a distinctive feature of the TAYGA 245. Gasoline brand. AI-92. As mentioned above, to lubricate the chain, the same oil is used as in the engine. In summertime oil should be diluted with gasoline in the proportion of 1/4. According to many chain saw owners, used oil (waste), such as from a car engine, can be used to lubricate the chain.

How to properly adjust the carburetor on a chainsaw?

Before adjusting the carburetor on the chainsaw, you need to learn the meaning of the three screws necessary for adjustment. These screws have certain markings and names:

  • The L screw is necessary for adjusting low revolutions;
  • The H screw is required when adjusting the motor to run at high rpm;
  • The T screw is needed to adjust the idle speed.

It is worth noting that some chainsaws are equipped with only one screw T, so the adjustment of carburetors of such models is performed by manipulating only with this screw.

No matter how many screws are on the chainsaw, the factory carburetor settings are the most optimal for its operation. The screws themselves are originally used for the purpose of adjusting the chainsaw to certain weather conditions.

Adjustment of the carburetors of chainsaws with three screws should be performed with the screws L and H. To increase the speed they should be turned in a clockwise direction. In order to reduce the revolutions, the screws are turned against it. To adjust the carburetor will need a special screwdriver for adjustment. it will not slide off the screws and damage the threads on their flats.

The process of adjustment of the carburetor consists of two stages: the initial and the main. The algorithm of actions during adjustment looks as follows:

  • In the first step the screws L and H should be turned clockwise to the very end;
  • After that, these screws need to turn 1.5 turns in the opposite direction;
  • At the second stage, it is necessary to start the chainsaw and leave it for 10 minutes for complete warm-up;
  • Then start to turn the T-screw until the chainsaw motor starts to run steadily and the chain on the bar doesn’t rotate.
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Possible causes of ineffective adjustment

If the work performed did not produce the desired result, the reason for the failure may be:

  • unclear operation of the ignition system;
  • clogging of jets or reduction of their sections by tarry deposits, which can be eliminated by washing in acetone;
  • loosening of carburetor fasteners can create a gap through which air is sucked.

After eliminating the detected flaws and faults, it is recommended to repeat the adjustment of the carburetor in the standard sequence. If the re-tuning was not effective, it is necessary to use the services of service professionals.

The cause of unstable engine operation may also be:

  • air leakage through the crankshaft seals and cylinder seat;
  • improper spark formation of the electronic ignition system cannot be ruled out.

Complicated faults can be fully eliminated only with the appropriate repair equipment.

Chainsaw Patriot PT 5220

Professional saw Patriot can work in any conditions. It has a long service life and withstands heavy loads. This saw’s armature is stable and robust.Specifications:

  • engine power is 2500 watts;
  • cutting part is 5 m in size;
  • gasoline tank. 0.55 l
  • a 0,26 l grease tank; the motor power is 2500 W;
  • weight. 6,5 kg.

Chainsaw Patriot 5220 provides a high level of safety to the operator. It has an inertia brake that stops the product in case of threatened chain breakage. Provides rubberized handles, the weight of the model is small. Anti-vibration system provides comfort in performing tasks.

Adjusting the carburetor of a Husqvarna chainsaw

For the most part, the procedure is almost completely similar to the above instructions, except for a couple of important nuances. First of all, if you want to make adjustment of the carburetor of a Husqvarna chainsaw with your own hands, you should get a special screwdriver with a special tip in advance. The adjusting screws for this brand of chainsaw carburetors, have a specific shape head and require a tool with the original slots.

  • First adjust the position of the L screw, which should be turned to get the maximum idle speed.
  • Next, the throttle gap is adjusted with the screw T. Tighten until the chain starts to rotate, then unscrew until it stops.
  • The high speed is adjusted with the H screw, which can be set by the sound. If you have no experience, it is better to use a tachometer.

These paragraphs are a brief paraphrase of the above instruction, where each action is explained in as much detail as possible. If you have any questions, simply scroll above, or see the following video that shows how to adjust the carburetor on your Husqvarna 137 chain saw. If there is no time, start watching from minute 37 where the tuning begins. In the rest of the timing, the old master shares his experience, talks about the features of the design of this model and makes repairs.

Chainsaw Carburetor Adjustment | How to Tune ‘Correctly’. by Craig Kirkman

Description and characteristics of the chain saw Patriot PT 3816

Purpose of chain saw is purely domestic: trimming shrubs, clearing trees of old branches, mowing, fuel preparation for baths, fireplaces and stoves. Sometimes chainsaw Patriot 3816 RT can be found on small construction sites (in the construction of simple wooden structures). The saw is not intended for heavy loads, but one full tank of fuel mixture will be enough for 40-50 minutes of work, after that it is necessary to take a break and let the tool cool down.

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Weighs 4.85 kg. Starting a single-cylinder 2-stroke engine on 2 liters. с. is implemented by hand starter (the system is engaged easy start), gas button for more safety is equipped with a lock. Non-contact ignition. Vibration dampening system, chain braking system (the chain stops in a fraction of a second when the brake engages), oil pump.

regulate, throttle, patriot

Convenient location of the air filter, no less easy access to the filter and spark plug, the user can disassemble, repair and reassemble the gasoline tool himself. The chainsaw is equipped by the manufacturer with a 40 cm long guide bar. The chain consists of 57 links.

Adjusting the Patriot 3816 chainsaw carburetor with your hands

Under atmospheric pressure, the air, after passing through a preliminary cleaning, enters the narrow part of the tube, where its flow is regulated by the flap. Here the air also becomes discharged and the resulting vacuum draws the fuel oil from the fuel line. A special needle connected to the jug chamber is used to adjust the fuel flow rate. The quality of the fuel mixture is regulated by the choke. when the air is opened more fuel begins to flow into the carburetor and the power of the propulsion system is increased.

To avoid problems with the work of the tool, it is necessary to periodically adjust the chainsaw. When too much air enters the mixture, it becomes depleted and engine power is reduced. The lack of air also negatively affects the unit, as the fuel consumption increases. It does not burn completely, which leads to the appearance of soot on the walls of the cylinders. It is quite obvious that the question of how to adjust the carburetor on a chainsaw, ask many owners of this tool.

First, however, it is worth noting the signs of a quality power plant:

  • RPMs climb quickly.
  • The engine sound is similar to the four-stroke.
  • There is no cranking of the chain at idle.

Adjusting the Patriot 3818, 4518, 5220 chainsaws carburetor

On chain saws Patriot 4518 and 5220 there are similar carburetors. The only difference is performance. Т.е. they allow you to work with larger engine displacement saws.

As for the adjustment of the carburetor on them, then everything is simple, it goes similar to the model 3816. You can safely use the instructions described in the article.

The primer and Easy Start system on the 4518 and 5220 make starting a cold engine easy. Before adjusting the carburetor, make sure they are in good working order.

In general, chain saws Patriot because of its average cost and quality, is equipped with a moderately reliable carburetor, which should be adjusted only in exceptional cases. If you are not confident in your own abilities, it is strongly recommended to entrust this procedure to specialists of the service center, because.к. there is all the same risk of failure, as a result of wrong adjustment of maximum revolutions of the chainsaw.

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Adjusting a chainsaw carburetor with your own hands

Adjusting the carburetor on a chain saw ensures that the tool can operate efficiently at full power and with economical fuel consumption. Adjustment should be done with a clean fuel and air filter. For more carburetors adjustment is made by three screws: for maximum and minimum revolutions and adjustment of idle speed.

The H and L screws are used to adjust the petrol/air mixture ratio determined by the carburettor choke opening. When unscrewing the screws the mixture is enriched, and the speed decreases accordingly, when tightening the screws the mixture is depleted the speed increases.

The designation H refers to the maximum rpm screw that controls the main jet, L. the minimum rpm screw, which controls the idle speed restrictor. The idling speed is precisely regulated with the help of the idling speed adjuster S. Sometimes, to simplify adjustment, the number of available adjusting screws of the carburetor is reduced.

Tuning of the chainsaw carburetor is divided into two stages basic (factory setting), which is carried out with the engine turned off. and the final one, performed on a running warm engine. The exact value of the turning angles should be taken from the instruction manuals for a particular chainsaw. Failure to follow the manufacturer’s instructions can result in engine damage.

The maximum H and minimum L turns setting screws are slowly turned clockwise as far as they will go and then turned back two turns

Find the highest idle speed by slowly turning the L screw in different directions. After you have found the maximum engine rpm position, turn the L screw 1/4 turn counterclockwise. If the chain still rotates at idle speed, turn the screw T or (S) clockwise until it stops.

Checking and Adjusting the Maximum RPM.

Changing the maximum rotational speed is done by the screw H. if this screw is turned clockwise, the rpm increases, if it is turned back out, the rpm decreases. it goes down. Chainsaw engines have the highest rpm from 11500 rpm. to 15000 rpm. The higher speed is not provided by the ignition, moreover, it becomes dangerous for the engine. You can tell the rpm limit by the ignition intermittency. If they are coming, turn counterclockwise a little bit and do not stop.

If the running of the engine is not checked for acceleration and maximum rpm the adjustment is not finished.

When the throttle trigger is pressed smoothly, the engine should confidently and quickly gain revolutions from idle to maximum ( from 2800 rpm.up to 11500-15000 rpm depending on the machine). If the rotational speed is slow and sluggish, turn the L screw slowly anticlockwise, but not more than 1/8 of a turn.

After adjusting the acceleration and maximum rpm, check again the idle speed of the saw. The engine should run steadily and the chain should not move. The tuning of the chainsaw should be repeated if this condition is not fulfilled but with the exception of the basic tuning step.

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