Stihl Chainsaw Won’t Start. The Reason Why Surprised Me
STIHL 180 chain saw repair does not start. STIHL STIHL 180 chain saw doesn‘t start Causes
“MASTER PLUS” repair of any complexity in the city. Serov
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I had the same problem, a brand-new saw after the 2nd refueling was not starting, what did not find tips, unscrew the muffler, look at the piston, but do not do it if you feel that there would be compression, starter cord because the pulls with effort. And our client is still up to outrageous simple, filled the plug and inexperience. Drain all the gasoline from the barrel. Unscrew the spark plug, check the spark, then you need to drain the gasoline from the cylinder, for this purpose turn the cylinder down gently pull the starter cord draining the excess amount of about 10 times. After that I put the saw in the same position for 5 min for ventilation and drying, screwed the spark plug. We fill the tank with gasoline and oil in the marked proportions. I put the lever in a cool start pulling twice smoothly 3rd jerk, started with the third jerk. I was about to go to the service.
Same problem, new saw, it stopped working on the 2nd refill. Checked the carburetor overflow, the spark plug in the gasoline, after drying the spark appeared. After purging the cylinder, as described in the brochure, tried to start the engine. In the “cold start” position, one burst, put the choke in the starting position. does not start. I unscrewed the spark plug and again in gasoline. Blow the starter a hundred times, same problem. And here comes your website, after reading Oleg’s advice (regarding blowing starter in the upside down position of the saw) tried, from the cylinder and carburetor poured gr 10 gasoline. Then attached the spark plug (without screwing) to the tip, put the choke to the start position, blew more. Assembled, primed and started. So thanks to Oleg for his good advice !
STIHL 180 chain saw starts and stops.
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THE STIHL 170 /180 WILL NOT START. CAUSES.
The main Causes of not starting the engine.LACK OF SPARK ON THE SPLING BLUE (Change the BLUE.
Oleg, thank you very much what is left to do our customer excellent simply!In a nutshell This saw is 6 years old and I use it 10 times a year. I used to get a bad start and at some point that’s it I took your advice. The problem is dared, I pity the money for a new spark plug and the air hose. filter, but I think in the future may need.Thanks additionally. Dear readers. always start simplemost of the time it’s the small stuff that’s the problem. Good luck with repairs!
Thanks to Oleg for this practical advice. Such tips should be prescribed in the instructions. Brand new saw didn’t start on the 3rd time, sparks happen, alas, the spark plug kicks in. Did what remains to do our client because Oleg wrote, started with the first jerk.
Why the chainsaw does not start well
Consider each cause in more detail.
Fuel and air filter
Contamination of the main filter elements of a chainsaw, negatively affect its operation.
For example, a dirty air filter will not provide a full amount of air to the carburetor, which will affect the quality of the fuel-air mixture and normal engine starting. Contamination of the fuel filter, make it difficult or even block the flow of gasoline to the carburetor and make it impossible to run the engine.
One of the most frequent causes of chain saw malfunctions is the chain saw’s cylinder block (piston group) deterioration.
As you know, in order to start a chainsaw, its engine must have compression. It is essential for proper compression of the fuel mixture in the engine cylinder, it also affects the work of the gasoline pump.
When the tool is running, the compression value will drop, and the chainsaw will not start properly.
The causes of lack of compression, or its decrease, can be natural, i.к. In the course of operation the engine is wearing out. The problem can also be caused by a serious failure, such as scoring of the cylinder/cylinder block, or a broken piston ring.
A sign of low compression, is the weak resistance of the starter when starting. Improper adjustment of the carburetor will cause the chain saw’s performance to fall, thus reducing the ability to operate at full power. The problem can be eliminated by replacing the piston rings or the entire cylinder block.
Adjusting the carburetor
Improper carburetor adjustment, will cause your chainsaw not to develop full power. Will not start well or will not start at all. Adjustment of the carburetor directly affects the quality of the fuel-air mixture, which is necessary for normal starting and further operation of the engine.
If the carburetor is not properly adjusted, there will be more or less gasoline in the fuel/air mixture than required, and the mixture will not ignite even with normal spark formation.
Excessive gasoline in the mixture is called overflow. A characteristic sign of an overflow, is a wet spark plug, after several fruitless attempts to start the chainsaw.
The spark plug
The spark plug is one of the main components of the ignition system. On its electrodes is the formation of the spark, and if this element fails, to make start will be difficult or not possible.
The spark plug may fail completely, or work intermittently or give a weak spark. Check the plug is simple enough, you need to unscrew it from the engine, connect it to the cap of the high-voltage wire and, putting it on the cylinder, pull the starter. If the spark plug is good, the spark is strong and has a bluish tint. Weak spark with a reddish tint, a sign of a problem. A faulty spark plug needs to be replaced.
If a new STIHL chain saw fails to start or starts poorly, it could be because of the restriction on the ignition coil. Modern chain saws are equipped with electronic ignition coils. This part cannot be repaired, and as a rule, if there is a defect, it is completely replaced.
The gap between the ignition coil and the flywheel
A wrongly aligned gap between the handwheel and the ignition coil contacts affects the quality of the spark formation, which in turn is responsible for a normal start and stable engine operation.
Why a STIHL chain saw won’t start when hot. Why chainsaws don’t start well
Let’s consider each cause in more detail.
Fuel and air filter
If the chain saw’s main filtration elements are clogged, this would impair the performance of the chain saw.
For example, a dirty air filter, will not supply the carburetor with the full amount of air, which affects the quality of the air-fuel mixture and the normal starting of the engine. The fuel filter becomes clogged, making it difficult or even impossible to get gasoline into the carburetor and run the engine.
One of the most frequent cases of chainsaw starting difficulties is the wearing of the cylinder block (piston group).
As it is known, for normal start of a chainsaw its engine should have compression. It is necessary for normal compression of the fuel mixture in the engine cylinder, it also affects the work of the gasoline pump.
When the tool is in use, the compression value will drop and the chainsaw will not start properly.
The causes of no compression, or compression loss, can be natural, i.e.к. the engine wears out in the course of operation. Also, problems can be caused by a serious failure, such as scoring of the cylinder block, or a broken piston ring.
A sign of low compression is the low resistance of the starter motor when starting. At low compression there is a decrease in the power of the chainsaw, which negatively affects its performance. The problem can be eliminated by replacing the piston rings or the entire cylinder block.
Adjusting the carburetor
Improper adjustment of the carburetor, will cause that the chainsaw will not develop full power. Will not start well or will not start at all. Tuning of the carburetor directly affects the quality of the air-fuel mixture, which is necessary for normal start and further engine operation.
If the carburetor is not adjusted properly, the fuel-air mixture will have more or less gasoline in it than needed, and the mixture will not ignite even with normal spark formation.
Overinflating is the term used to describe an excessive amount of gasoline in the mixture. After several unsuccessful attempts to start the saw, the spark plug is wet.
The spark plug is one of the primary components of the ignition system. It produces a spark on its electrodes, and if this element is damaged, it will be difficult or even impossible to start the engine.
The spark plug can completely fail, or work intermittently or give a weak spark. To check the spark plug is simple enough, you will need to unscrew it from the engine, connect it to the cap of the high-voltage wire and, putting it on the cylinder, pull the starter. If the spark plug is okay, the spark is strong with a bluish tint. Weak spark with a reddish tint, a sign of a problem. Defective spark plug must be replaced.
The ignition coil may be the cause of a new chain saw not starting, or starting poorly. Modern chainsaws, are equipped with electronic ignition coils. This detail can not be repaired, and, as a rule, if there is a defect, it is completely replaced.
Gap between ignition coil and flywheel
Improperly exposed clearance between the flywheel and the ignition coil contacts affects the quality of spark formation, which in turn is responsible for normal starting and stable engine operation.
When a piston needs to be replaced
Circumstances on which the piston should be changed, as in general, and one hundred percent of the piston, you will like enough, alas, what is left to do our customer them are divided into natural and showed up in the course of improper operation. Natural, this wear and tear caused by continuous use of the STIHL STIHL 180 chain saw. Artificial ones are not just yet, for example:
- Overheating of the engine and thermal scoring;
- Foreign bodies in the cylinder and mechanical burrs;
- piston ring fracture caused by exceeding the maximum engine speed;
- Piston skirt fracture due to excessive RPM;
- the introduction of bad fuel which causes the chainsaw’s piston group to wear out the intake canal in the cylinder;
- Operation of the STIHL chain saw with a dirty fuel filter which reduces the percentage of oil in the fuel consistency;
If the engine suddenly loses power or does not start, check the cylinder head. For which the design if the starter turns, alas saw does not start, with all of course spark and fuel in the cylinder is correct, it is necessary to measure the compression in the engine.
If you suspect that you may have a problem with the cylinder head, you should consult an authorized servicing dealer. к. It is the only way to accurately diagnose the problem without a complete disassembly and, if necessary, carry out a high-quality repair.
Circumstances on which the piston needs to be changed, as in general, and one hundred percent of the piston, you like a lot, but our customer is divided into their natural and showed at the end of improper operation. Natural, this is wear and tear from continuous use of the STIHL STIHL 180 chain saw. Artificial ones are not just yet, for example:
- If there is a foreign body in the cylinder and mechanical scoring has occurred;
- piston ring breakage after exceeding the maximum rpm of the engine;
- piston skirt breakage due to excessive rpm;
- the introduction of bad fuel, and as a result, the chainsaw piston group wears out not familiar with the intake channel in the cylinder;
- Use of STIHL chain saws with a dirty fuel filter which reduces the oil percentage in the fuel consistency;
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Have the cylinder head checked if the STIHL mc 180 no longer starts when the engine suddenly loses power and the starter does not turn. If the passage if the starter does not turn, alas the saw does not start, but there is a spark and the fuel in the cylinder is flowing properly, you need to measure the compression in the engine.
If you suspect that there is a problem with the gas cylinder, it is best to contact an authorized service center, i.e. к. there are only a few variations that are possible without a complete diagnosis and, if necessary, a high-quality repair.
Circumstances on which the piston to change, as in general, and one hundred percent of the piston, but what remains for our customer to do them are divided into natural and as a result of improper use. Natural. wear and tear from endurance use of the STIHL 180 Series chain saw. Artificial ones are not just yet, for example:
- ingress of foreign matter into the cylinder and the onset of mechanical scoring;
- breaking of the piston ring as a result of exceeding the maximum engine speed;
- Piston skirt fracture due to excessive rpm;
- the introduction of bad fuel, under the influence of which the piston group chain saw is not worn familiar in the intake channel in the cylinder;
- STIHL chain saws with a dirty fuel filter can cause the oil percentage in the fuel consistency to drop;
If the STIHL MS 180 suddenly loses power, or in other words does not start, and the tool does not turn on the starter, check the cylinder block. If the passage if the starter turns, but the saw does not start, of course, the spark and fuel in the cylinder is arriving properly, it is necessary to measure the compression in the engine.
If you suspect it may be a problem with your cylinder head, it is best to consult an authorized service center. к. only in it there are variations without a complete disassembly to accurately diagnose a fault and if necessary carry out a high quality repair.
Adjusting the STIHL 180 chain saw carburetor with your hands
Tuning the STIHL MS 180 carburetor is essential to ensure that the saw operates efficiently at maximum RPM and that you conserve fuel. To perform this procedure you need to clean the air filter and the fuel filter.
You can adjust the carburetor of the model with the three standard screws. The L and H screws are needed for adjusting the air/fuel mixture ratio which is adjusted by different positions of the throttle valve. The S screw is responsible for fine tuning the idling of the chainsaw. The procedure for adjusting the carburetor is as follows:
- First you have to start the machine and turn a few screws (H) and (L) one after the other in a clockwise direction until they reach the stop. Then both screws must be slowly turned two full turns in the opposite direction;
- Then find the maximum RPM of the motor when the saw is idling. To do this turn the screw L alternately in different directions. Do not make squeaking noises with the screws. Once the basic maximum revolutions have been found, it is necessary to slowly turn the L screw a quarter turn against the clock hand;
After that you should alternately check the operation of the engine at minimum idle and then at maximum rpm.