Chainsaw partner p340s DIY repair

Question: I decided to work with a chainsaw Partner 340 s. About 20 days, 7-8 hours a day.

The frosts were severe. There are no complaints about the start-up and the engine, but the chain lubrication has disappeared. What should I do?

Answer: It is very likely that if the oil was thick, the oil pump drive was ripped off.

It should be, as it were, a weak point in the drive, just in case - either a worm, or a gear on the plunger, but it's not good to do weak to such an extent.

It is necessary to remove the clutch, remove the pump and watch. Or service.

Question: On the 3rd day of operation, the transmission failed, that is, the motor is running, and the chain does not spin as if it were idle. What's the problem? Some kind of gear flew?

Saw Partner p340s, sawed wood. He took off the box, there is a drum, under which an asterisk, dangles. Maybe a marriage? I twist the chain by hand, the sprocket rotates, it is not movable inside, the drum itself is also not movable.

When assembled and wound up and the brake is raised, the chain does not rotate at low throttle or at full throttle, there is no clutch.

Answer: This means that the asterisk has been removed from the drum. Surely a factory defect, only the leading asterisk is attributed by manufacturers to the expense, many even clearly indicate this in the saw's passport.

Question: Such a problem with the chainsaw Partner p340s - I press the gas and it happens that the failure goes as if the mixture is not enough, but the tank is full.

The mixture was made 40: 1, oil 2t, turn asset partner, rosy, gasoline 92y. The saw is new.

I saw the board at low revs and it may stall. And the oil flows from the chain when it just stands idle.

Answer: The carburetor is most likely not adjusted.

Question: The partner 340 S chainsaw is in operation. It stopped starting at all. In operation a little more than 2 years.

At first it began to start up intermittently, but every time it started up. Now you can't start it at all - the maximum that you can do is pull the handle, start the engine for a couple of seconds and immediately stall, after which it will not start.

I changed the candle - there was almost no difference (the old spark was noticeably worse), except that she began to grab it for the first time.

After pulling the handle of the plant several times, the candle becomes damp, after drying it is possible to start it only for 1-2 seconds, after which it fills in the candle again.

I tried to blow through the carburetor - no change. What else can you see?

Answer: Start by removing the muffler. It's simple enough there. At the outlet, inspect the condition of the piston. If you see longitudinal grooves, that's all - replacing the piston.

Question: the piston is pulled right on the body itself, when assembling the Partner 340s chainsaw, are there any nuances or not?

Answer: when you put a bearing with an oil seal on the clutch side on the crankshaft, you need to slightly twist it to the left - to the right and look so that the inner part does not wrap on the oil seal, the so-called. lip.

If the spring pops out, the saw will not work. You can use a thin screwdriver to touch up the lip on the edge of the crankshaft, just carefully, and slightly lubricate the crankshaft and lip of the oil seal with gasoline oil.

The question is: what could be? Sawing with a chainsaw Partner for 340 minutes 15, stalled and did not start, only grabbed and stalled, then stopped grabbing, took off the air filter, started up, but also did not work smoothly.

The saw is new, burned only a couple of liters, working not very long. Idling seems to be normal, only floats, this is annoying.

Maybe there was overheating? I saw at maximum speed, I do not hold it at idle speed for a long time. How to check a piston?

Answer: That swims not very well. There should be idle speed on a serviceable saw - watch, especially on a new one.

Remove the muffler - it's very easy there and look at the piston and cylinder. There should be no longitudinal scratches and abrasions.

If the piston is in order, you can (if you have at least some skills) try to deplete L a little by turning it a little clockwise.

Question: I bought myself a Partner p340s chainsaw, cut 3-4 trees with it, which are not at all large, and the saw began to stall at idle. That is, when you give gas, it starts to work with a slight dip.

As soon as you turn off the gas, it works for about 30 seconds and stalls. The mixture was prepared as
put according to the instructions. Tell me, who faced this?

Answer: The idle screw T on the carburetor should be slightly clockwise to the right. If there are further dips, screw L must be slightly unscrewed (against the arrow). Do not touch screw H.

It is best for a master to do it. poor winding is associated with the screw L, it becomes poor. Failures are also due to this.

It happens that you start the saw, it warms up, runs at idle. You press the gas sharply, the saw seems to choke, tries to stall (stalls). If you press gently, the engine accelerates. this is failure.

Turning screw L - you add gasoline at idle. And feel
this is possible - with a sharp press on the gas, the saw sharply picks up speed without failure.

If it works fine on gas, then screw T has no results - try turning L counterclockwise, a little bit.

Spin 1/12 1/6 wait 15 seconds, spin wait. until there is a failure during re-gasing.

Question: the Partner 340S chainsaw without an overrunning clutch, when trying to find it, it turned out that couplings with a left-hand thread and with a diameter of 8 and 10 are on sale, and on the crankshaft it looks like 9, since it does not turn on 8 at all, but flies along the thread for 10.

Crankshaft thread not stripped 100%. Who will tell and advise what?

Answer: Apparently, I mean the clutch. The logic here is simple - since the ones on sale do not fit your saw, then they are from other models and you need to look for the clutch specifically from the 340S model.

It is possible that it will be possible to pick up an analogue from another saw, but most likely it will not fit in terms of the outer diameter, or width, or overhang, or the stiffness of the springs.

Question: I bought and tested the chainsaw Partner 340 s. The build quality is not bad, although I didn’t like the chain tension scheme (I unscrewed the tire nuts, and only then did you screw in the tension screw, its work is also a little slowed down); the plastic is quite dense; everything starts up quickly.

But, there are some doubts about the power when working with this saw, namely: you press the gas lever, and it, at times, reluctantly picks up speed, hence the stops in the cut itself, which is why you have to take it out of the cut, do a little overrun and continue cutting ...

What is more like having to adjust the carburetor? Or is it something else?

Mixture: last year's 92 + 1 year old husquarna oil (I guess this is not critical), proportion 1:47 (break-in period). So far I managed to burn 1.5 tanks of fuel.

Answer: You need 1:35, only semi-synthetic oil. The method has been tested, and in the case of good gasoline, it will not be worse either.

For people engaged in construction or logging, as well as living in their own living quarters with an adjacent plot of land, it will be very useful to own a quality Swedish chainsaw "Partner 350", which is an excellent substitute for other tools for cutting wood, for example, two-handed saws or hacksaws ...

Like any other units, chainsaws also require careful maintenance and periodic maintenanceotherwise they will quickly break down as a result of exploitation. At the same time, contacting qualified specialists with a request to fix a chainsaw costs money, which you may not want to spend for any reason, because you understand that you can fix most of the faults and breakdowns yourself.To do this, you need to understand the structure of the chainsaw and watch a video where you will receive detailed instructions for repairing the Partner 350 chainsaw.

The vast majority of product malfunctions occur due to engine problems and related systems. Usually, to repair the unit, it should be disassembled. In order not to make a mistake during the disassembly process, read more about the design of the chainsaw in the video or operating instructions.

When your chainsaw won't start, you should first see if are the candles in good working order, giving a spark, due to which the fuel ignites and by force of an impulse pushes the piston, which does useful work.

In order to assess the condition of the candle, you need to remove the wire going to it from the starter and unscrew it with a suitable key from the groove. Examine the candle: its appearance will tell you what happened to the chainsaw:

The consequence of such malfunctions is the inability of the fuel to penetrate into the cylinder and begin to carry out useful work on the rotation of the chain, therefore the chainsaw will not start... The reasons for this are as follows:

1. The fuel filter is out of order because it is clogged.
2. The breather is clogged (this is the name of the hole made by the manufacturer in the gas tank and designed for air to enter the tank through it).
3. Lack of fuel in the gas tank.
4. The diaphragm in the carburetor is not complete, or there is a high probability of blockage in the carburetor passages.
5. Carburetor adjustment is not correct.

To determine if the breather or filter is clogged with foreign objects, you will need to disconnect from the mountings fuel hose and see if gasoline flows from it and with what pressure. If gasoline comes out slowly and weakly, clean the breather with a thin, sharp object, such as an awl. If the problem is with the filter, remove it from the fuel tank and clean it, and replace if necessary.

Did you find that the carburetor is the root cause of your problems? The good news here is that if your carburetor filter gets clogged, you can easily clean it yourself. In addition, you can easily do the adjustment and tuning of the carburetor of the Partner 350 chainsaw with your own hands, if you strictly adhere to the recommendations from the instruction manual.

The bad news is that with other, more complex carburetor repairs, you are unlikely to cope with your own hands, and you will have to take your unit to the mechanics. Sometimes the manufacturer deliberately does not write in the instructions, how to tune and repair a carburetorso that people who do not understand the device of the product do not try to fix the malfunction on their own if the chainsaw suddenly stops starting and, as a result, does not completely break the unit.

To the main breakdowns of this system chainsaws include:

• Low pressure detected by the cylinder compression gauge, which causes the motor to lose power and cannot rotate the chain at the speed necessary to cut wood efficiently. The pressure at which the engine runs smoothly is approximately nine atmospheres.
• Loss of tightness of the rings in the pistons, due to which hot gases from the cylinders enter the crankcase. The malfunction is eliminated by replacing the rings.
• Problems with the tightness of the gaskets located in the cylinder head (cylinder head). Visually expressed in the form of emissions of gasoline combustion products through the slots in the gasket and the pressure drop in the engine. The problem is solved by replacing the gaskets.

If you want to know if there are problems in the cylinders, then the easiest way to do it is remove the muffler and assess the situation, looking through the hole left over from the removed muffler at the insides of the cylinders. In the event of the need for repairs, of course, you will need to remove the cylinder head for open access to the pistons and cylinders.

Sometimes, having accelerated your chainsaw to high engine rpm, you are surprised to find that the engine cannot cope with them, and your tool stalls. At the same time, smoke begins to pour out of the muffler. However, the motor runs easily at low revs.

In this case, there is a high probability that the muffler of your unit clogged with carbon and other products of incomplete combustion of fuel, therefore it must be cleaned. This work is done as follows: you will need to remove the muffler from the chainsaw and disassemble it; then clean its outer and inner surfaces from carbon deposits; in the last step, dry with a hair dryer and place on the chainsaw.

Please note that it is recommended to cover the muffler opening with a plug or rag to avoid clogging of the cylinders with debris.

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

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, pruning trees and branches - this is not the whole list of works that this model will cope with without problems. Despite the well-thought-out design and layout of the units, over time, wear of the power unit, transmission elements and fuel system occurs.

Experienced fellers know that a competent and accurate determination of the nature of a breakdown is half of the repair work done. Based on many years of experience in repairing the partner 350 chainsaw, specialists have developed a special method for diagnosing problems.

Major chainsaw breakdowns Partner 350

It should start 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. Chainsaw spark check;
2. Ignition coil;
3. Diagnostics of the fuel supply system;
4. Inspection of the crankshaft bearings.

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

Adjusting the spark plug gap with a feeler gauge

Failure to reach 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, there is an inconsistency in the occurrence of a spark and interruptions in the operation of the internal combustion engine.

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

If no discharge is observed on the replacement spark plug, it is necessary to check the integrity of the high-voltage wire and, if necessary, replace it.

The absence of a bright blue spark in the plug may indicate the need to inspect the ignition module and adjust the gap. For these purposes, we remove the plastic protective cover from the saw and check the condition of the coil. The wires leading to it must be firmly fixed with screws; they must not dangle at the connection point. Moisture must not be present on the flywheel of the drive shaft as it interferes with the generation of an electromagnetic field.

Flywheel and ignition module of the Partner 350 chainsaw

In the absence of such inconsistencies, you must make sure that the clearance between the module and the flywheel is correct. 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 need to independently adjust the ignition of the Partner 350 chainsaw.

For the most accurate adjustment, you need a regular coin-shaped or flat probe, which you can buy in specialized or automotive stores.

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

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

Carburetor Partner 350 disassembled

If the mixture does not flow from the tank, it is necessary to inspect the built-in filter and breather (hole in the lid). If the fuel filter becomes clogged, it will need to be replaced. To clean the breather, you can use an ordinary sharp needle, carefully removing the remnants of 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, when dismantling, cleaning and assembling, maximum attention is required.

The carburetor is used to mix the fuel mixture (oil and gasoline) with air. Its work begins with the jerk of the saw starter, which forces the membrane to pump fuel. After that, a diaphragm-controlled needle valve supplies gasoline to the main chamber, through which it enters the cylinder. The throttle valve can be used to "enrich" or "lean" the fuel mixture with air. When it is closed, less air will flow into the cylinder at the same fuel level. In this case, consumption will increase, coupled with a decrease in engine power. Therefore, the adjustment of the Partner 350 chainsaw plays an important role in creating an optimal balance of moderate fuel consumption with high tool performance.

It is recommended to make self-tuning only if you have special tools and skills.

Before starting adjustment work, it is necessary to clean the main fuel unit from dust and dirt. To do this, you can use a compressor with compressed air or a broom 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, turn the screws of the fuel quantity and quality fully clockwise until they stop, loosening them after 1/5 ... ¼ turn.

Partner 350 chainsaw carburetor with adjustment screws

When the cover is removed, you need to know that the screw for the quality of the fuel mixture is on the right and, accordingly, the screw for adjusting the amount of gasoline is on the left. For convenience, the carburetor body is marked under the bolts:

- "L" - screw for the amount of fuel (adjustment at low speed);

- "H" - screw of the amount of the mixture (setting at maximum speed);

- "T" - idle speed adjustment bolt.

It must be remembered that the adjustment of the carburetor of the Partner 350 chainsaw must be carried out on a warm engine. At high temperatures, the metal expands linearly, as a result of which the throughput of the channels increases.

As soon as the cylinder becomes warm, turn the screw "L" until the internal combustion engine produces the maximum crankshaft speed. Then we twist it a quarter of a turn. It is worth noting that in this position, the screw for the amount of supply of the mixture should support the operation of the motor at idle. If such a setting is not enough, then boldly unscrew the “T” bolt until the engine runs stable. Using the screw "H" we correct the work of the Partner chainsaw at maximum speed.