How to Adjust the Carburetor on a Partner 350 Chainsaw

Partner P 842 Benzosaw. Model Features

This tool is equipped with a reliable hand starter and an effective forced-air system. Capacious fuel tanks reduce the number of refills during operation.

Features of this Partner model include:

  • The capacity of the internal combustion engine. 2.2 liters. с.;
  • Tank for refueling with fuel mixture. 340 ml;
  • the possible length of the bar used for work. 35-40 cm;
  • The pitch of the standard working chain. 3/8 “;
  • weight incl. headset: 5.7 kg.

The saw is equipped with a reliable inertia brake that activates as soon as the chain hits a nail or other hard object.

To summarize

The carburetor on the Partner 340s chain saw has no major flaws. It is a simple and reliable design. All of its failures are caused by careless chainsaw operation and prolonged use (material fatigue). Proper carburetor adjustment and maintenance will extend the life of the carburetor considerably. Some people may not be satisfied with the average cost of a carburetor. 23-30 But in this case the price corresponds to the quality.

Partner is a chainsaw manufacturer and is a subsidiary of the famous Husqvarna AB. In today’s review, we will look at one of the most popular chainsaw models. Partner p340s.

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Adjusting the Partner 350 with Your Own Carburetor

Before adjusting your Partner 350 it is important to keep the carburetor area free of dirt and dust.

The easiest way to remove the chips from the chain saw is to use a compressor with a blowgun or a blower attachment.

First step of the adjustment

The Partner 350 has a hole on the left side of the top cover where you can access the adjustment screws, but if this is the first time you are adjusting your chainsaw, you might want to remove the cover. Adjusting the carburetor on your own is easier because. к. This is more convenient because you can see where the heads of the adjusting screws are.

Then set the quality and quantity screws to their fully tightened positions, and then loosen them by 1/5 of a turn.

If you are adjusting with the cover off, you need to remember that the left screw is the quantity screw, respectively the right one is the quality screw. To make it easier, the manufacturer marks the carburettor body, under each of the screws with (L) and (H). (L). quantities. In some manuals it is also called the screw, which is responsible for traction at low and medium speeds. (H). fuel quality, regulates the number of maximum revolutions.

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Also, there is a third adjustment screw on the carburetor, which is marked with a (T). It is necessary to correct the throttle position when idling.

Tip: If for some reason the carburetor does not have markings on the adjusting screws, you can distinguish the screw (T) by the spring installed on it, which is necessary to prevent spontaneous unscrewing during operation. It also has a hat for a Phillips screwdriver.

Second step

After the screws have been set in position, the Partner 350 chain saw should be started and run for a few minutes. к. adjustment should be performed on a hot engine. As soon as the cylinder becomes warm, you can proceed to the adjustment of the quantity screw, for this it is necessary to twist it clockwise, until the engine will not give the maximum revolutions, then immediately unscrew the screw in the opposite direction by one-quarter turn.

adjust, carburetor, partner, chainsaw

Knowing how much the carburetor on the Partner 350 chain saw costs, any owner of this saw, before changing the unit completely, tries to make its repair and adjustment on their own. Often such repairs lead to the complete destruction of the carburetor, and in the case of the adjustment, the death of the engine. In order to avoid such problems it is necessary to become familiar with the repair and adjustment process in advance, but the best option is to entrust the repair and adjustment of the carburetor of the chainsaw Partner 350 to professionals.

adjust, carburetor, partner, chainsaw

The Partner 350 is equipped with a standardized carburetor. Exactly the same carburetors can be found on other brands of chainsaws with similar power. Several manufacturers produce them, but the design, dimensions and parameters of these products are standardized.


Using the Partner 350 chain saw with a 1.8L engine.с. You don’t have to worry about the chain jamming, so you can get the right amount of work done to cut firewood or do construction work. This is ensured by an automatic inertia brake and chain lubrication during operation.

Partner P350 carburetor adjustment

CCS system with high-performance air cleaner permits on-time cooling of the machine and prevents it from overheating. Low production noise due to properly designed housing that dampens noise.

Read a helpful article reviewing popular models of pole drills here.

Available 3/8″ chain pitch allows for even distribution of applied load. fuel tank capacity at 0.4 liters provides the right amount of fuel for continuous operation and does not weigh down the saw with a weight of 4.7 kilograms. The engine volume is 34 cubic meters.see.

Druzhba chainsaw carburetor device. Druzhba 4 chainsaw construction

“Druzhba”. chainsaw model. Developed at the “Progress” ZMKB named after A.G. Smirnov. academician A. Г. Ivchenko in November 1953. Producers. Druzhkov Machine Building Plant named after academician A.A. Druzhkov. Dzerzhinsky (Perm) and GUP PO “Sibpribormash” (Biisk). Mass production of this saw began in 1955. In 1958 at an exhibition in Brussels it was awarded the “Gold Medal”. In 90-s the production of saw and its spare parts was mastered by small private enterprises in different Russian cities.

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Druzhba” was named to honor the three-hundredth anniversary of the reunion of Ukraine with Russia, celebrated in 1954.

Engine MP-1 designed by ZMKB Progress n.a. V.V. Menzhinsky (the Russian abbreviation for “Progress”). Academician A. Г. The engine is single-cylinder, two-stroke, carburetor, air-cooled, working volume of 94 cm3, power of 4 liters.с. The engine and saw unit are made as independent units and are connected to each other with a flange connection secured with a clamp (which is attached to the saw handles). Such arrangement allows to turn the saw unit to any angle, if necessary to quickly replace the failed unit. Thanks to functional completeness and simple mounting, the engine of the Druzhba chain saw was used as a drive for power tillers (“Kumir”, “Sadovod”), water pumps (“Skif”, TsBN-1, TsBN-2, PMP-4), direct current generators (GZ-106A) for charging the batteries in the field, mechanical winches for forest skidding, in the boat motor “Kama”, in lawnmowers. This engine was also popular among fans of building machinery with their own hands. In the 60’s at the Moscow Aviation Institute attempts were made to boost this engine and install it on ultralight aircraft. Light helicopters X-3, X-4, X-5 were manufactured, each having four “Druzhba” engines operating through a common reducer on the main rotor. None of the machines have been flight tested because of poor engine reliability.

The problem: A chain saw cuts out after starting

A frequent problem: Your Partner chain saw cuts off at high rpm, but before it starts it runs on medium throttle without any problems. Sometimes works intermittently on medium, too. but at full throttle, it immediately throttles. This problem is encountered by many users who save on quality fuel.

Poor gasoline easily fills parts with soot. In this case it is good to check the filters (air and fuel). over, bad fuel and the soot it creates can damage the muffler.

Dirty fuel combustion products just clog it, creating an impassable cinder blockage. This clog greatly reduces the power of the engine. It uses a lot of gasoline, but no result in terms of power. Check and clean the muffler:

  • Remove any fuel residue from the tank.
  • Remove the muffler and take it apart.
  • Do not leave the exhaust port open. cover it with a cloth or cap.
  • Clean all fouling from the muffler with a cable and/or detergent. According to reviews, well-proven “Mr. Muscle” for pipes or similar household chemicals.
  • Cleanly washed muffler must be dried. You can do this with a hair dryer to speed up the process.
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After completing the troubleshooting recommendations, replace the muffler and prime the saw with a quality (!) with fuel and start it up.

Additional recommendations

After purchasing a “Partner-350″ chainsaw, you can perform carburetor adjustments while using it. Before you begin to carry out these works, you should consider that the settings set at the factory are optimal. The screws described above can be used to adjust the engine’s operation in special cases where unusual external conditions, such as individual climatic conditions, require this. When adjusting, you need to use the screws marked H and L. To reduce the RPM, turn them counterclockwise. To increase the speed, turn the screws in the opposite direction.

The required sequence of screws is of great importance. It looks like this: L. N. T. If there are difficulties in the adjustment process, it is advisable to seek help from a professional in a timely manner, because incorrect adjustment can cause damage to the engine.

What kinds of breakdowns may occur

Chainsaw malfunctions can be divided into groups:

  • Engine malfunctions (ignition, exhaust and cylinder-piston systems, fuel supply).
  • Failure of parts such as the clutch, chain brake, lubrication system or guide bar.

Chain saw engine failure is the most common. It is its detection and repair that takes the most time. If you have a power tool, it often needs to be replaced by a harvester or muffler.

Before you start to repair your chainsaw, first check all the possible causes of malfunctioning, or better yet, watch the video. Nowadays you can find any interesting material on the Internet.

Then you will have to prepare the necessary tools to repair the breakage:

Malfunction of ignition system

When the engine refuses to work, but at the same time there is a spark on the spark plug, and the fuel comes, you should check the ignition. It is not difficult to check it at all: unscrew the spark plug, and adjust the gap between the contacts, connect it to a wire and press it to the cylinder housing. After that, watch when the spark appears.

If there are any deviations, it is necessary to perform adjustment of the ignition system. In general, this process is similar to the adjustment of ignition in other two-stroke engines.