Adjusting the carburetor on a Partner 350 s chain saw

The carburetor on the Partner 350 chain saw: adjustment, device, repair

When doing construction and repair work in your country house, you can’t do without a chain saw. The same can be said for garden maintenance. If this tool fails, all work will come to a standstill, so it is very important to be able to troubleshoot it yourself. With some experience, you can adjust the carburetor yourself. Although the procedure is somewhat complicated, it can be learned by anyone with the right attitude.

The Partner 350 model stands out with its great selection of features and high quality build. The basis of the garden tool. a 2-stroke 1-cylinder engine, running on a mixture of gasoline AI-92 and engine oil. Engine piston group is forged and chromium-plated to prolong engine life. The factory engine includes a proprietary CCS filter that traps even the tiniest foreign particles and keeps them out of the fuel supply.

The Partner 350 chain saw has easier starting than its competitors because of its improved self-cleaning drum starter, professional-grade fuel pump, and long-lasting electronic ignition. The model is equipped with a primer for pre-pumping the fuel used in the cylinder.

For operator safety during chain saw operation, Partner equipped the garden tool with a quality inertia brake that triggers immediately if the saw headset hits a nail or any other foreign object.

Metal bar and chain on the Partner saw. Their tensioning is done with two wrenches, without having to remove the protective cover of the plastic housing.

One of the great advantages of the Partner 350 chain saw is the good location of the controls. The throttle lever, recoil switch, and recoil starter cord are located on the rear of the tool, making it easy to operate in confined spaces.

Repairing the carburetor on your Partner 340 chain saw

A common problem with the carburetor on the Partner 340 chain saw is leaking fuel (leaks). First you need to check the integrity of the gasket between the carburetor and the engine crankcase. If it is all right, then the problem is in the carburetor tightness.

adjusting, carburetor, partner, chain

To check the tightness you need a pressure gauge. The gauge inlet is on the fuel hose. Then use a bulb to pump a certain amount of air into the carburetor. Readings should be at least 0.4 bar. After some time the pressure is measured again. If it has fallen, the carburetor needs repair. The following causes may be to blame:

There is a diaphragm chamber cover on the side of the carburetor on the Partner 340 chain saw. Through a hole in it, dirt gets inside the carburetor. When it builds up, the diaphragm rises and pushes the needle valve lever. As a result, the lever does not completely block the fuel channel, resulting in over-enrichment of the mixture.

You need to remove and clean this cap from accumulated dirt more often. Thankfully its design allows to do it quickly and easily (it is necessary to unscrew four screws on the carburetor side).

All the above failures usually have 2 main causes: overheating of the engine (poor mixture) and carburetor clogging (insufficient fuel cleaning). Both problems are solved by proper adjustment and timely cleaning of the carburetor, air filter. Do not forget about the quality filter element for gasoline.

Give the mesh a special attention during cleaning, the slightest clogging will make the chain saw unstable.

Parts that fail can be replaced with the appropriate repair kit.

Partner 350 Chainsaw Specifications

Practical hints on using the Partner 350 chain saw can be found at

After a proper running-in, adjustment, the working mode of the saw allows a wide range of jobs, including longitudinal cutting of wood.

device features

It is important to run the factory device in time before starting the work process, in time to adjust.

The main components of a carburetor are:

  • Main part. It is a special tube designed to let air in. There is a slide valve that can be repositioned.
  • Diffuser. This is a narrow tube area. It is necessary to speed up the mass flow of the air type.
  • Fuel supply duct. Fuel is stored in the float chamber. From there it goes to the nozzle and then to the atomiser.
  • chamber. Shaped like a container. Maintains the correct amount of fuel.

To adjust and repair the saw, we will need tools. screws L, H, T, diagram.

Problems with the chain

How to adjust the plastic door by yourself

A special catcher is used to control the chain, which also has a chainsaw “Partner 350”. Malfunctions of this type are caused by improper use of the device. As a result, the chain can sag after a while. In such a situation, the repair of the saw should begin with the inspection of the sprocket. It is located near the handle. It is not necessary to remove it in this case. If the sprocket teeth are not deformed, you can simply try lubricating them with machine oil.

Next, it is important to inspect the catcher bar. In the device it is quite simple and is a set of rollers

When the catcher fails, they are knocked off the chain. It is not possible to set them back on your own. The only option is to put in a new catcher. To do this, use a screwdriver. Its fixation is carried out on three nuts

When installing the catcher, note that the rollers are located at the top and must be near the chain


The Partner 351 saw has good power and performance despite its compact size and weight of 4.7 kg:

  • motor power 1400 W (1,9 l.с.);
  • Bus 35 cm. There is an option to install a 41 cm bar;
  • 56-link chain with 3/8-inch pitch;
  • Spark plug. Bosch WSR 6F;
  • Fuel tank capacity of 380 g;
  • Oil tank capacity of 200 gr;
  • The noise level is just over 100 dB.

CCS-operated air filter helps significantly reduce fuel consumption. Dual air-cleaning system extends the life of the Partner 351 chain saw motor. Chains run at high rpm.

Intelligent ergonomics and reliable vibration damping allow you to use the machine for hours at a time.

The chain brake activates immediately, making your chainsaw even safer and more comfortable to use.

Main malfunctions and troubleshooting

For one reason or another, the tool can fail. Before you can disassemble your chainsaw, you need to be prepared. Hands alone aren’t enough to repair a chainsaw, you need tools to do the job.

Basically, the chainsaw does not start for 2 reasons: lack of spark and problems with fuel flow from the carburetor into the cylinder. This can manifest itself as: the chain saw doesn’t start or works irregularly. When you increase the rpm it stalls.

Read also: Copying inserts for the cutter

First you clean all dust and dirt from the outer casing. After that remove the cap and clean the inside surface of the cap. Unscrew the spark plug, clean it, check the electrode gap. Adjust the gap if necessary. Put the wire on the spark plug and bring it to the body, pull the starter. If we see a spark, then the ignition system is fine. Replace the spark plug if necessary. Along with the spark plug, the fuel filter should be checked and cleaned. After reassembly the saw should start.

The next problem is a carburetor malfunction. Often it is caused by the vibration of the motor after a long day’s work. Re-adjust. There are 3 adjusting screws: S (idle), H (maximum rpm), L (minimum rpm).Adjust them according to the manual.

These are the two main reasons that affect the start and operation of the chainsaw. They do not require a complete disassembly of the chain saw. Troubleshooting other types of malfunctions require considerable skill, for example, everyone can disassemble the carburetor, but assemble it is not. Complete disassembly and other troubleshooting is better left to professionals. Sometimes specialty wrenches are needed that are not part of a normal locksmith’s tool kit. Buying them might be more expensive than going to a repair shop.

Overall, the chainsaw is quite good. Reliable enough chainsaw when operated properly and prevented in time.

How to adjust your Partner 350 carburetor chainsaw

Repair and construction of the country can not do without the use of a chainsaw, this is true even in the care of the garden. If the tool is faulty, it will cause all the work, so it is important to have self-testing and troubleshooting skills. If you have some experience, you can make adjustments to the carburetor, this procedure is complicated, although it is quite possible.

adjusting, carburetor, partner, chain

Disadvantages of the saw

In the Russian market, you can find not very high quality counterfeits of the Partner 350 chain saw, which is not only an additional indication of its popularity, but also harms the brand as a whole. And other models of this brand are a success with dacha owners and farmers.

If you are ready to consider the Partner 350 as your home tool for sawing non-thick trees, trimming limbs and other not very voluminous work, you should know the disadvantages, most often cited by their owners:

The vibration damping system is of poor quality, which makes your hands get tired pretty quickly. But considering that it is a household tool, requiring a 15. 20-minute rest every 20. 25 minutes of work, you can live with this disadvantage.

Oil leaking from the chain lubrication system, which, incidentally, affects most chainsaws equipped with it, including the more famous relative of Partner chainsaws. Husqvarna.(link)

There is no visual control of the oil level, which is not very convenient in operation, and operating the saw without lubrication will lead to rapid stretching, overheating and wear of the chain.

Of course, with this saw you can cut through the wood up to 30. 35 centimeters thick, but its main purpose. to work on the site. Therefore, we offer you the most objective video review of this model:

Dear readers, if you still have questions, please ask using the form below. We would be happy to talk to you

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