Partner Carburetor Adjustment Wrench Partner

Among the huge selection of models in the modern construction market, the Partner 350 chainsaw, which is produced by a subsidiary of Husqvarna, stands out.

Partner Carburetor Adjustment Wrench Partner

General view of the Partner 350 chainsaw

Simple and easy to use, reliable and unpretentious, this saw has gained wide popularity among summer residents and owners of country houses. Sawing firewood, trimming trees and twigs. This is not the whole list of works with which this model can cope without problems. Despite the thoughtful design and layout of the units, over time, the power unit, transmission elements and the fuel system wear out.

Chainsaw Troubleshooting

Experienced loggers know that a competent and accurate determination of the nature of the breakdown is half the repair work done. Based on the long-term experience in repairing the Partner 350 chainsaw, specialists developed a special method for diagnosing problems.

The main breakdowns of the Partner 350 chainsaw

It starts from the simplest nodes and mechanisms, ending with more complex ones.

This allows you to significantly save time and avoid unnecessary operations. Troubleshooting is recommended in the following order:

  1. Checking the spark of a chainsaw;
  2. Ignition coil;
  3. Diagnostics of the fuel supply system;
  4. Inspection of crankshaft bearings.

Checking sparks on candle electrodes

To diagnose the presence of a spark, it is necessary to remove the spark plug and, without removing the high-voltage cable, make a few jerks with a starter. If there is a discharge, it will be necessary to set a gap between the central and side electrodes. Its value in Partner 350 should not extend beyond 0.7 to 1.2 mm.

Probe clearance adjustment

The lack of this distance can lead to incomplete combustion of the fuel mixture and, as a consequence, increased fuel consumption with limited power of the unit. As a result of exceeding this parameter, inconsistencies in the occurrence of sparks and interruptions in the operation of the internal combustion engine are observed.

If there is no spark on the electrodes, it is necessary to replace the spark plug and repeat the diagnostic procedure described above.

If discharge is also not observed on the replaceable candle, it is necessary to check the integrity of the high-voltage wire and replace it if necessary.

Diagnostics and tuning ignition Partner 350

The absence of a bright blue spark in the candle may indicate the need to inspect the ignition module and adjust the clearance. For these purposes, remove the plastic protective cover from the saw and check the condition of the coil. The wires leading to it should be firmly fixed with screws and should not hang out at the junction. Moisture must not be present on the flywheel of the drive shaft, since it prevents the occurrence of an electromagnetic field.

Partner 350 flywheel and ignition module

In the absence of such discrepancies, it is necessary to make sure that the clearance between the module and the flywheel is set correctly. Its value should be no more and no less than 0.2 mm, and therefore, if it does not coincide with the recommended distance, you must independently configure the ignition of the Partner 350 chainsaw.

After checking the ignition, we proceed to the diagnosis of the fuel supply system.

350 chainsaw fuel system

An important influence on the correct operation of the saw is played by the fuel system, consisting of a gas tank, pipes and a carburetor.

Partner 350 carburetor parsed

If the mixture does not come from the tank, it is necessary to inspect the built-in filter and breather (hole in the cover). If the fuel filter is clogged, it will need to be replaced. To clean the breather, you can use a regular sharp needle, carefully removing the remaining dirt and sawdust from the valve. If the carburetor becomes clogged, it will need to be dismantled and thoroughly cleaned.

It must be remembered that the Partner chainsaw carburetor is a complex assembly consisting of many small parts. Therefore, during dismantling, cleaning and assembly, maximum attention is required.

Carburetor principle

The carburetor is used to mix the fuel mixture (oil and gasoline) with air. His work begins from the moment the jerk of the starter jerks, which forces the membrane to pump fuel. After that, a diaphragm-controlled needle valve delivers gasoline to the main chamber, through which it enters the cylinder. Through the throttle, you can “enrich” or “deplete” the fuel mixture with air. When it is closed, less air will flow into the cylinder at the same fuel level. In this case, the consumption will be increased, coupled with a decrease in engine power. Therefore, adjusting the Partner 350 chainsaw plays an important role in creating the optimal ratio of moderate fuel consumption with high tool productivity.

It is recommended to perform self-tuning only with special tools and skills.

DIY carburetter for Partner 350

Before starting adjustment work, it is necessary to clean the main fuel assembly from dust and dirt. To do this, you can use a compressor with compressed air or a carpentry brush.

To adjust the carburetor, holes are provided on the left side of the power unit, however, for the convenience of determining their position, experts recommend dismantling the protective plastic casing. First, we tighten the fuel quantity and quality screws clockwise until they stop, loosening them after 1/5. ΒΌ revolution.

Partner 350 chainsaw carburetor with setting screws

When dismantling the cover, you need to know that the fuel mixture quality screw is on the right and, accordingly, the gasoline quantity adjustment screw is on the left. For convenience, on the carburetor body under the bolts is marked:

It must be remembered that the carburetor adjustment of the Partner 350 chainsaw must be carried out on a warm engine. At high temperatures, the metal expands linearly, resulting in increased channel throughput.

As soon as the cylinder becomes warm, tighten the screw “L” until the internal combustion engine gives out the maximum revolutions of the crankshaft. After we twist it a quarter of a turn. It should be noted that in this position the screw of the mixture supply quantity should support the engine idling. If such a setting is not enough, then boldly unscrew the “T” bolt until the engine runs stably. Using the “H” screw, we adjust the operation of the Partner chainsaw at maximum speed.

Crankshaft Bearing Diagnostics

An important factor in the correct operation of the engine are bearings and crankshaft oil seals.

Partner 350 crankshaft with bearings

To diagnose their wear, a flywheel mounted on the shaft must be swayed in the vertical and horizontal plane. If there is a clear play, it is necessary to replace the rolling bearings. If there are oily traces on the crankcase, then the oil seals will need to be replaced. It will not be superfluous to check the play of the Partner 350 crankshaft, for which we remove the cylinder and piston. With the help of hands we shake it left and right, thereby simulating a natural movement.


Despite some difficulties in repairing the Partner 350 chainsaw with their own hands, the owners of these units, before handing over the tool to specialized centers, try to restore their performance on their own. Indeed, most of the problems can be eliminated with ordinary metalwork tools and with the presence of basic experience in the repair of mechanical components.