Frequent malfunctions in Partner 340s 350s 360s, Champion 340 chainsaws
When performing construction and repair work at the cottage, it is impossible to do without the use of a chainsaw. The same can be said about the care of the garden. If this tool fails, all work will stall, so it’s important to be able to troubleshoot it yourself. With some experience you can adjust the carburetor yourself. Although the procedure is quite complicated, anyone can learn how to do it, if they have the desire.
The need to adjust the carburetor gasoline saw “Partner-350” occurs quite rarely. The most common problems are related to engine wear and tear or improper fuel supply. There are several indications that tell us when a need for adjustment arises. One of them is that the engine shuts down immediately after it has been started. Other times it may not start at all. Such problems are caused by an excessive supply of oxygen or a shortage of fuel. The malfunction may occur when the fuel consumption increases, resulting in an increase in the volume of exhaust gases. This is due to an oversaturation of the fuel mixture with fuel.
Mechanical causes of failure
The need for adjustment of the carburetor of the “Partner-350″ chainsaw can also be caused by mechanical failure. For example, strong vibrations can cause damage to the protective cap. As a result, the rigid fixation of the bolts available in the carburetor loosens.
Another possible cause is engine piston wear and tear. If this happens, a carburetor tune-up will allow you to use the machine for a while, but it will require replacing the worn-out part to correct the problem. Another reason could be a clog caused by poor-quality fuel. Such problems can be caused by scale buildup and filter damage. To correct the problem, the carburetor needs to be disassembled, flushed out thoroughly, and then repaired.
Problem Diagnosis
Before you begin repairing the unit, you should perform a quality diagnosis of the saw. To determine the cause of the breakdown, you need to familiarize yourself in detail with the design of your Partner 350 chainsaw. A broken saw can be caused by any part of the saw, but the most common causes are as follows:
Each of these defects is accompanied by certain “symptoms” that will help accurately diagnose the problem.
Checking the spark plug
Check the spark in the Partner 350 chain saw by removing this element from the saw, its further connection to a high voltage wire. If the spark plug is working correctly, the spark is always there, so it is not difficult to find.
Malfunctions in this area can be caused by the following
- a problem with the spark plug itself;
- Loose contact in the wiring system;
- breakage of the ignition button;
- Lack of ventilated passages between parts in the ignition system.
Adjusting the mixture and spark plugs on your Partner 350 chain saw
Testing the Fuel System
Fuel is the primary energy source for your saw, so a problem with the fuel system can be the cause of a breakdown. Checking the fuel in your Partner 350 chain saw is the first step in diagnosis. If the tank is full enough, it is worth carefully inspecting the spark plugs. If the spark plug is dry, it means that no fuel is flowing through it. After finding this fact, all elements of the system must be checked, starting with the carburetor.
Adjusting the carburetor on a Partner 350 chain saw
The following may be the cause of the malfunction:
If the Partner 350 chain saw does not turn on after the fuel test, the problem is in another area of the saw.
Check bearings
The saw’s support shaft should be checked for stability through the crankshaft bearings. The piston rod and bearings must be firmly attached to the frame. If you can see gaps between some parts of the mechanism when the piston moves, they need to be replaced.
Major malfunctions
The following types of faults are characteristic of the Partner chainsaw:
- Engine malfunctions such as ignition, fuel supply or exhaust and piston-cylinder system problems;
- failure of carburetor parts, such as the clutch assembly, chain brake, or lubrication system.
Causes of failure can vary, but most often it’s improper operation, not enough oil, or a poor fuel mixture.
How to remove and disassemble
Correcting malfunctions of the chainsaw carburetor is possible only after this part has been removed. And for that you need to disassemble the chainsaw itself. This work will have to be done in the following sequence:
- Remove all the assemblies in strict order. First the chain brake cover and the chain guide bar, then the top cover, the saw handle and the starter.
- After these parts have been removed, you must clean the saw with a compressor and a nozzle.
- After that you need to close the intake window, because there is a risk of dirt and foreign objects getting inside.
Cleaning
Cleaning the carburetor can be done in different ways, most often with air. The sequence of operations is as follows:
- Unscrew the upper bolt on the cover of the part.
- Remove the valve gasket. After that, you need to blow out the mesh with compressed air. At the same time you should not blow closely, but at a small distance.
- No other parts of the carburetor need to be removed. You can use a special liquid to clean the surface.
- Now assemble the carburetor and fasten the parts in the reverse order.
Other repair work
Other repairs may be necessary for your Partner chain saw to work effectively. Doing the repair with your own hands is not difficult.
The most common problem is the lack of:
- spark in the spark plug (you need to either clean the gap on the plug, or replace the coil or flywheel with similar parts);
- fuel supply (the cause could be a clogged hose or fuel filter)
- Air supply (requires flushing the air filter).
Basic malfunctions
The following types of faults are characteristic of the Partner chainsaw:
- engine malfunctions, such as ignition, fuel supply, or exhaust and piston-cylinder system problems
- Failure of carburetor subassemblies, e.g. clutch assembly, chain brake or lubrication system.
Causes of failure can vary, but most often it is improper operation, insufficient oil or poor fuel mixture.
How to remove and disassemble
Correcting chainsaw carburetor malfunctions is possible only after this part has been removed. And for that you need to disassemble the chainsaw itself. You will have to perform this work in the following sequence:
- Remove all parts in strict order. First the chain brake cover and the saw headset, then the top cover, the saw handle and the starter.
- After these parts are removed you need to clean the saw with a compressor and a nozzle.
- After that it is necessary to close the intake window, since there is a risk of dirt and foreign objects getting inside.
Cleaning
Cleaning the carburetor can be done in different ways, most often by air. The sequence of work is as follows:
- Unscrew the upper bolt of the part cover.
- Remove the valve gasket. Afterwards blow out the mesh with compressed air. Do not blow closely, but at a small distance.
- No other parts of the carburetor need to be removed. You can use a special liquid to clean the surface.
- Now assemble the carburetor, fixing the parts in reverse order.
Other repair work
For your Partner chain saw to work effectively, other repairs may be needed as well. Perform the repair with your own hands is not difficult.
The most common problem is the lack of:
- spark in the spark plug (you need either to clean the gap on the spark plug, or replace the coil or flywheel with similar parts);
- Repair any other problem you may have with your Partner chain saw, such as a clogged fuel supply hose or fuel filter;
- air supply (flushing of the air filter is required).
Adjusting the carburetor on your Partner 340 chain saw with your own hands
The carburetor on the Partner 340 chain saw is originally set by the manufacturer for maximum power and efficiency. We may need to do some additional adjustment if the traction characteristics worsen, what is possible in case of sudden temperature changes or if we put some other fuel in the tank.
The algorithm for adjusting the carburetor itself is as follows:
- To access the quality (H) and quantity (L) screws there are special holes on the left side of the chainsaw. For your convenience you need to remove the protective cap.
- Tighten both screws to the end, and then unscrew each by 1/5 of a turn.
- Start the chainsaw and warm it up for 5 to 10 minutes.
- Adjusting the idle speed. To do this, tighten the screw T counterclockwise until the engine begins to work as steadily as possible. Make sure that the chain doesn’t rotate (if it does, turn the screw smoothly until it stops). If the engine stalls at idle, the T screw needs to be unscrewed again a little.
- Adjust the engine power and the mixture quality. Hold the accelerator pedal gently until the engine rpm reaches maximum. Maximum rpm is 11,500 rpm according to manufacturer’s specifications. RPM (use a hand-held electronic tachometer for exact determination). If the RPM does not increase, turn the screw L counterclockwise 1/8 turn. Do not exceed maximum rpm above recommended rpm, i.e.к. This could lead to ignition problems. In this case turn the screw H counter-clockwise, thus reducing the maximum rpm
If you do not have a tachometer handy, you can visually check if the carburettor is set correctly. When the engine is “high” (with an enriched mixture), it is necessary to turn the L screw a little. If the engine warms up and revs itself, unscrew screw H about ¼ turn anticlockwise.
Sometimes it happens that the adjustment does not help. The engine doesn’t rev up or stalls. The cause could be a clogged filter or air intake. Simply clean and readjust the carburetor if necessary.
Characteristics of the Partner 350 chainsaw
This model is in great demand among consumers, but most often it is bought by cottagers for working on their plots. Used not only for making firewood, but also in construction.
In general, Partur 350 chain saws are characterized by their compact dimensions. They are equipped with a rather powerful engine. Their main advantages are easy start and reliable operation
, made by a quality electronic ignition system and a fuel pump.
It is completely safe to use this chainsaw. It has a built-in safety system that automatically performs start of the inertia brake
for the chain. The same mode is used for its lubrication.
There will be no problems with starting the Partner chainsaw even in winter, as it has a fuel primer
The starter drum is equipped with an impeller that helps clean up dirt. It is also equipped with the CCS system. This design retains residual particles and is also used when the air filter is used for a long time.
To increase the service life of the chain saw the designers made chrome-plated walls on the cylinder of the piston group
Also this model has an ergonomically shaped handle and anti-vibration system.
Making adjustments
Owners of the “Partner-350” chainsaw can perform the adjustment of the carburetor on their own, without seeking help from professionals. Of course, in this case, it is necessary to adequately assess their capabilities and skills. If you are confident you can start with the disassembly according to the recommendations above. Then you can proceed with the adjustment and further adjustment. Some Partner chainsaws have one screw, but most have three. It is necessary to differentiate between them. The manufacturer has identified each of these with a different letter to help you understand the function of each item. The screw, labeled H, is for the upper rpm setting. The screw marked L is used to adjust the lower speed. The adjustment of the idle speed is made with a screw designated by the letter T. Models with only one screw have only one element.
Without certain skills and special tools, such as various size chisels or an ultrasonic bath, the repair of a Partner 350 carburetor is limited to replacement of the repair kit.
WT-891 carburetor repair kit may consist of just gaskets and diaphragms, or may include all the replacement parts. This:
It is not possible to replace the complete set without experience and tools, so when repairing on your own, it is better to choose the first option of the repair kit. If, after replacing the repair kit and adjusting the carburetor, the Partner 350 chainsaw shows signs of malfunction, then to solve the problem, it is better to contact the professionals.
Signs of a faulty lubrication system
The right choice of consumable lubricant and perfect operation of the system, contribute to full lubrication, effective cooling of the saw equipment, and complete depletion of its service life.
There are several external signs that the chain on a chainsaw does not lubricate. First of all, it is:
- Constant oil level in the tank;
- An increase in the load on the engine;
- Accelerated wear on the cutting edges of the saw links;
- A characteristic smell of overheated wood.
In the simplest case, the cause of oil starvation may be clogging of the oil ducts by sawdust. This defect is characteristic of budget headsets that do not have easy access to the problem areas.
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Wet contacts
If there are wet deposits on the working contacts of the spark plug it means that a lot of fuel is getting into the cylinder. This is most often caused by problems in the ignition system or a faulty carburetor adjustment of the chainsaw.
When eliminating this malfunction, first remove the wet deposit from the contacts (use a dry cloth or cloth for this purpose), and then they are well dried. To remove unburned gasoline residue from the cylinder, its internal cavities should also be thoroughly cleaned and dried.
There is another way to get rid of residual fuel: first, turn off gasoline and then crank the starter several times.
When all these operations are complete, the spark plug is put back in its original place, then the fuel cock is opened and the saw is attempted to restart.
Wet contacts
Wet sweat on the spark plug pins means that there is a lot of fuel in the cylinder. This is most often attributed to problems in the ignition system or improper adjustment of the chainsaw‘s carburetor.
If this fault is corrected, first remove any wet deposits from the contacts (use a dry cloth or wipe to do this) and then dry them well. To remove unburned gasoline residue from the cylinder, its internal cavities should also be thoroughly wiped and dried.
Another way to get rid of residual fuel is to first turn off the fuel and then crank the starter a few times.
After all these operations the spark plug is put back in its place, then the fuel tap is opened and an attempt is made to restart the saw.
Carbon deposits on the pins
If you see black carbon deposits in the gap between the spark plug pins, it is symptomatic of a fault in the fuel system, such as a mixture imbalance or poor oil. In order to eliminate the causes of carbon deposits, you should carefully adjust the carburetor in the first case and change the oil in the second case to a more suitable one.
After that you need to remove the carbon deposits from the contacts with an awl or any other sharp tool, and then sand them with a fine sandpaper (the best is “nullivka”).
If your chain saw still does not start, check for a spark between the chain saw pins.
The main problems with your Partner 350 chain saw
often than not, the cause of tool failure is associated with interruptions in the work of the engine or other nodes and systems. Any troubleshooting requires disassembly. To do everything correctly, you need to know the design features of the chainsaw and the main causes of its failure.
Checking the ignition system
First of all, if any chainsaw malfunctions, you should inspect the spark plug. To do this, first disconnect the wire, and then use a special wrench to unscrew the spark plug itself. By its appearance you can understand the cause of the problem:
- A chainsaw spark plug covered with soot indicates use of poor quality oil, an incorrect oil to gasoline ratio during fuel preparation, or a poorly adjusted carburetor. In this case, it is necessary to clean the spark plug from fouling with a needle or awl, wash and wipe the electrodes with a sandpaper.
- If the spark plug is heavily splashed with fuel, most likely the carburetor is not properly adjusted, or the rules were violated starting the tool. To remove excess fuel, you need to cut off the fuel supply, turn on the starter and check the combustion chamber. After that, the spark plug is wiped, screwed back into place, and the mechanism is started again.
- Completely dry spark plug indicates that no fuel mixture is getting into the chainsaw cylinder. In this case, the ignition system is not the cause, so the spark plug is put back in.
To check the performance of the spark plug, you need to put the ignition cable on it, connect the cylinder and the nut of the spark plug with pliers, and start the starter. If there is no spark, the spark plug should be replaced.
Repairing the chainsaw’s fuel system
There may be several reasons why the fuel-air mixture does not enter the cylinder:
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- clogging of the fuel filter;
- clogged hole in the fuel tank cap (breather plug);
- insufficient amount of fuel;
- improperly adjusted carburetor;
- clogging of channels or damage to carburetor diaphragm.
To diagnose a clogged filter or breather, you simply disconnect the hose and see how the fuel flows. The fuel should come out of the tank at a good flow. If it is intermittent and weak, then the filter should be pulled out through the tank neck and washed or replaced, and the breather plug cleaned with a needle.
The chainsaw carburetor is a fairly complex device with many small parts. That’s why its disassembly and repair is better to trust professionals.
If the carburetor filter is clogged, it can be carefully removed, shaken out, washed with detergents and put in place.
Your own hands carburetor can only adjust. You can do this with three screws according to the instructions.
Cleaning the Muffler
In some cases, the engine starts to stall and smoke at high revolutions. At the same time at low revs it works normally. Most likely the reason is that the muffler is clogged with combustion products. To eliminate this malfunction, the muffler is removed, disassembled and cleaned of the soot with detergents. After that you need to dry it with a hair dryer and install it.
While the muffler is removed, the saw’s exhaust port should be covered with a clean cloth.
To summarize
The carburetor on the Partner 340s has no real bottlenecks. It is simple and reliable in design. All the damages are caused by careless chainsaw use and long time use (material fatigue). Proper carburetor adjustment and maintenance will considerably prolong its service life. Some may not be satisfied with the average cost of a carburetor. 23-30 But in this case, the price is commensurate with the quality.
Chain lubrication system for chain saws
One of the fundamental chainsaw systems, without which operation is impossible, is the forced lubrication system of the chainsaw chain. It’s no secret that chain rubs against the chainsaw bar when it’s in motion, heating up the chain and causing premature wear. To alleviate friction, the chain must be constantly lubricated.
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Product Repair
Proper disassembly can easily be done to repair a Partner 350 chainsaw with your own hands. Repair of each group of breakdowns is made depending on the design features of the defective elements.
Problems with the engine cylinder block
If you have a problem with the cylinder piston group it is a good idea to remove the parts from the crankshaft. It is important to know that the piston is connected to the support cage with a piston pin. This mounting element should be removed with a screwdriver. The defective piston is removed and a new piston is installed in its place and later inserted into the cylinder. To downshift
all parts in the friction are lubricated with engine oil.
The body of the shaft should be to the left of the flywheel arrow, and the recommended clearances between elements should be observed. Check that the shaft with a new piston operates properly and performs as expected prior to use.
Replacing the oil pump
The oil pump can always be serviced and, if the Partner 350 chain saw oil pump fails, it is worth replacing it with a new one. The design of this part is a drive sprocket-adjustable pump connected to a clutch.
Before removing the oil pump, the chainsaw covers are first unscrewed, and then the piston is secured and the clutch is loosened. The drive sprocket is replaced by inserting a new part through the needle bearings. The sprocket must be seated on the shaft, having first lubricated its frame.
Where is the breather plug
The Partner 350 chain saw has two breathers like all other chain saws. One is responsible for equalizing the pressure in the oil tank, the second. the fuel tank. The oil tank breather plug is mounted near the oil tank lid and has a special disposable metal cap on top of the breather to keep air out.
The fuel tank breather of the Partner 350 is located in the carburetor mounting area and is sealed with a stopper like the previous one.
Tip: The breather plugs need to be replaced if the tanks are vacuumed and the fuel and oil supply is shut off.
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