Increased fuel consumption and rapid formation of carbon deposits on the brush cutter when using properly prepared fuel mixture talk about the need to adjust the carburetor. Here's how to tune trims with carburetors that have a single fuel adjusting screw.
Carburetor adjustment
Flush the air filter before adjusting the carburetor. It is recommended to rinse it after every 10 hours of operation. After that, you can start adjusting. The photo shows the PRORAB-8406 petrol trimmer carburetor as an example. The numbers indicate the adjusting screws that we will use.
PRORAB-8406 petrol trimmer carburetor adjusting screws
Purpose of adjusting screws:
- Fuel mixture adjustment screw.
- Idling adjustment screw.
- Restraint screw maximum speed.
Start a petrol cutter and wait until it warms up.
Fuel supply adjustment
Start slowly turning the fuel mixture adjustment screw until the engine starts to stall or stalls if you do not have time to catch the moment. After that, unscrew the screw a quarter of a turn if the engine has not stalled, or half a turn if it stalled. Start the stalled engine. Check by opening the throttle as the engine picks up speed. Continue to unscrew screw # 1 by a quarter of a turn until the engine starts to accelerate steadily during gas flow. This will be the moment of the most economical stable engine operation. For the PRORAB-8406 petrol trimmer, the adjusting screws are turned clockwise, unscrewed - against, for some other brands the petrol cutter can be the other way around.
Idle speed adjustment
We start adjusting low speed. Screw number 2 limits the return movement of the lever throttle - by wrapping it, we increase the idle speed, unscrewing it, we decrease it. Adjust so that the engine runs confidently at low revs and even a little accelerated (for better starting), but so that the line reel or knife does not rotate, and there is a sufficient reserve of revolutions before they start spinning. If the engine starts poorly, increase the revs further by idling.
Maximum speed limitation
After adjusting the flow of the fuel mixture and low speed, check how the engine of the petrol cutter will work at maximum speed. If necessary, limit the maximum rpm to required level with a # 3 hollow screw. Loosen the retaining nut and turn in the screw to decrease the maximum RPM or turn it out to increase it. Tighten the nut after adjustment. The maximum RPM setting is necessary to protect the trimmer motor from overheating and to be able to use the release key to reduce right hand fatigue.
In the future, it may be necessary to readjust the trimmer carburetor. For example, if the engine starts to rev poorly when running at full load, loosen screw # 1 another quarter turn. If starting is difficult, increase idle speed. Both weather conditions and the quality of the fuel mixture can affect the operation of petrol mowers. Vibration can cause the adjusting screws themselves to turn.
Spring may interfere
My first attempt to adjust the carburetor of the brushcutters did not work, as the spring of the fuel mixture adjustment screw interfered. The factory spring turned out to be too thick when compressed and did not make it possible to reduce the fuel supply to the required level. I had to pick up another spring and continue adjusting after replacing it.
Fuel mixture adjusting screw with spring In the photo above the factory spring, below the adjusting screw with the matched spring. I am writing about this because I'm not sure if this is an isolated case, and someone else may face the same situation.
From personal experience
Gas cutter or trimmer
A trimmer is a broader concept than a brushcutter (brushcutter), since it can also be electric. A petrol trimmer and a petrol cutter are one and the same.
Some authors claim that the trimmer is a weaker tool in contrast to the more powerful petrol cutter, which can be used for cutting bushes. Personally, I have a tool with maximum power 1.7 kW and capable, as stated in the instructions, to mow small shrubs up to 10 mm thick. The user's manual is called "Petrol trimmer ...".
Fuel ratio
I read somewhere that if different proportions of the preparation of the fuel mixture are indicated in the manual for the petrol brushes and on the oil canister, the proportion indicated in the manual should be used.
For a long time he did this - excess oil flowed from the engine onto the gas tank and carbon deposits constantly formed on the candle, since the manual indicated the proportion for the run-in engine 1:25, and on the canister - 1:50. After switching to a ratio of 1:50, the appearance of oil drips stopped. The plug continued to burn, but at a lower intensity (the carburetor had not yet been adjusted).
Until now, some users of gasoline-powered tools determine the proportion of the fuel mixture "by eye". If during the preparation of the mixture the amount of oil is underestimated, after a while an extraneous sound may appear immediately after starting the engine, which gradually disappears during warming up, and the engine stops with a sharp jerk. Continued use of the trimmer in this mode will lead to its failure.
Candle cleaning
In the worst times of trimming with an unadjusted carburetor, the engine would stop starting after every tank of fuel was used. And only after cleaning the spark plug from carbon deposits could work continue.
Fine sandpaper was used to clean the electrodes, and a thin paper clip with a bent end was used to clean the space between the insulator and the body. First, the electrodes were wiped off large dirt with a rag, then they were cleaned with sandpaper. After that, the candle was dipped into diesel fuel and the moistened carbon was scraped off with a paper clip from the surfaces of the insulator, the inside of the body and between them. Then the candle was dipped several times into diesel fuel, which was then shaken off it along with the dirt. Sometimes the paper clip cleaning and rinsing procedure was repeated. After that, the candle was wiped dry and was ready for further use.
Incredibly, one tank of fuel mixture with an unadjusted carburetor can be used up in less than 10 minutes - proven in practice when the trimmer was started and operated at high revs with maximum fuel supply (the adjusting screw was unscrewed much more than the norm).
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Trimmer malfunction:
Licked the edges on the trimmer drive shaft (I had to buy a new shaft).
"Licked" because the shaft splines at the top are not in engagement with their entire length (it happens that the shaft clings only a few millimeters at the end). At the bottom of the gearbox the shaft enters the entire length under its own weight.
At the first so. the trimmer must be checked and made so that the shaft enters the clutch at the top for the entire length of the splines (or edges, if there is a square). To do this, try to put the reducer higher on the pipe, having previously loosened its fastening, or try to push the pipe deeper into the shock absorber, having previously loosened its fastening. If the splines of the shaft still do not fit the entire length of the clutch, then it is necessary to shorten the pipe (cut off a part) by the length necessary for the splines to fully enter the clutch.
Warning: Just do not overdo it with cutting the pipe (it is better to cut off a smaller piece), since if the shaft turns out to be longer and it will be necessary to cut it, then when the shaft splines are heated, the metal will be released, i.e. the hardened metal will become soft and will not last long (the shaft itself is made of alloy steel).
P.S. If the shaft has already "licked", then just turn it over - install the shaft with the upper splines knocked down into the gearbox and do what is described in Do-it-yourself trimmer repair.
Trimmer Repair: How to Stop Gear Leakage
Trimmer malfunction:
Where does the grease go from the trimmer gearbox (Chinese trimmer, instead of a plug, I screwed a grease can and a syringe into the gearbox).
Cause of trimmer malfunction:
The solid oil pushed through the closed gearbox bearings under pressure. During operation, liquid hot grease driven by rapidly rotating bevel gears (in a small volume of the gear housing) "flies out" either into the driver chuck if the closed bearing rings on the driven shaft are pushed, or up into the pipe body if the closed bearing rings on the drive shaft are pushed reducer.
Have the bearings (or the entire gearbox) replaced at a service center and then use a special grease for the trimmer gearbox (eg Husqvarna).
Advice: Chinese petrol cutters have a small hole for adding grease to the gearbox, so it will be more convenient to draw grease from a branded tube into a medical syringe (without a needle), and from it add grease to the gearbox.
Husqvarna trimmer repair 333R
Husqvarna 333R for 3.5 seasons of active commercial operation (required replacement):
Note: I read somewhere that the operating time of two-stroke engines to failure is no more than 500 hours, and I have burned ~ 370 liters of gasoline in 3.5 seasons, i.e. if 0.35 liters. per hour, then the operating time is more than 1000 hours! The Husqvarna 333R trimmer is a very reliable trimmer (petrol cutter).
Note: Please write in the comments what you think about this trimmer repair.
Repair of petrol cutters: how to replace gearbox bearings
Trimmer malfunction: tell me how the gearbox is disassembled on the trimmer to replace the bearing (Husqvarna). And does he understand at all?
Answer: the Husqvarna petrol cutter gearbox can be disassembled to change parts such as bearings, bevel gear train, housing (since the gear assembly for the Husqvarna trimmer costs about $ 150.)
It is necessary to remove it by loosening the tightening bolts at the bottom, be sure to wash it (for example, with gasoline), then use round-nose pliers to bring the ends of the retaining spacer ring (there are two of them on the gearbox) and pull out the bearings with a small puller. They should move easily as the upper bearing is no longer constrained by the housing and the drive shaft of the Husqvarna trimmer comes out of the lower bearing.
Trimmer repair: how to restore the thread in the cylinder spark plug hole
Trimmer malfunction: The spark plug is difficult to tighten.
Cause of malfunction: The thread in the spark plug hole of the cylinder is damaged due to the fact that the spark plug did not follow the thread when it was screwed into the cylinder, or sand got on the thread of the plug, or the thread was torn off by a great effort on the key.
If the candle is not screwed in deeply into the thread, then you can drive the thread in the cylinder with a tap of the appropriate size, then screw in a new candle and tighten with a force of 32-33 N * m. If the candle does not turn, then everything is fine, but with subsequent turning of the candle, you need to be especially careful. If the spark plug is turned, you will have to install a foot (repair sleeve). To do this, it is better to contact a repair shop for chainsaws and petrol trimmers. There is necessary tool and qualified personnel to select and purchase (or manufacture) a spark plug repair sleeve suitable for your spark plug, then properly disassemble the engine, drill the spark plug hole of the exact required diameter, cut the corresponding thread in the cylinder. Then rinse everything and blow off the chips, screw the candle into the sleeve, apply thread sealant or cold welding to the thread of the sleeve, screw the candle together with the sleeve into the prepared hole, dry it, assemble everything, start and adjust. Alternatively, replace the engine cylinder. Do-it-yourself repair of petrol cutters is similar to repairing a trimmer.
Advice: The main thing when installing a spark plug is that you first need to turn the candle out of hand for a few turns, and then take the key. If the candle went easily by hand, then it is installed correctly and can be wrapped with a tool (a candle wrench with a wrench). If the candle does not want to twist by hand, it is not worth tightening it with a wrench forcefully, since the candle has not gone along the thread and damage to the thread in the spark plug hole of the cylinder is inevitable and expensive trimmer engine repair will be needed.
Repair of petrol cutters: how to cut and change the gasket under the carburetor
Trimmer malfunction: Cold engine trimmer with a closed air damper of the carburetor starts up almost normally, works at high idle, when the engine heats up, an unstable operation is observed, after which the trimmer engine suddenly stalls. The malfunction of the brushcutter is the same as that of the trimmer.
Cause of malfunction: Air leaks under the carburetor trim tab gasket due to loose carburetor attachment or frequent carburetor removal / installation.
Make a new trimmer carburetor gasket from thin paronite (up to 0.8 mm thick) or thick cardboard. How to make a carburetor gasket: cut a piece slightly larger than the future finished gasket out of thin paronite or thick cardboard, spread seat on the cylinder or carburetor with oil or grease, carefully attach the prepared piece for the gasket so that a clear imprint from the grease remains on it (the outline of the future gasket). Then cut the middle with a small sharp narrow chisel on a heavy metal lining (for example, an anvil), cut the holes with a special head from a set of suitable diameter, and cut the outer part with scissors. Alternatively - attach paronite or cardboard to the cylinder seat, just do not move, tap the edges with a mallet, and knock out the holes with a ball from the bearing, but there is a risk of damaging the edges. The first option is how to make a better carburetor gasket. That's it, the carburetor trimmer gasket is ready. Do-it-yourself repair of petrol cutters in this case is similar to repairing a trimmer.
Trimmer repair: how to replace gears and bearings in the trimmer gearbox
Fault trimmer: Trimmer reducer - hum, rattle, squeak and other noises in the lower part of the trimmer, sticking when turning and wobble of the driven shaft. The malfunction of the brushcutter is the same as that of the trimmer.
Cause of malfunction: The bearings of the trimmer gearbox have failed due to overheating of the gearbox, lack of lubrication in the gearbox housing, hitting the trimmer knife against a stationary object, long-term (many years) active operation.
Replacing the bearings in the trimmer gearbox yourself (you need keys to remove the gearbox; round-nose pliers to remove the retaining rings and disassemble the gearbox; gasoline to wash all the insides for troubleshooting parts; new trimmer gearbox bearings for replacement) or replace the gearbox bearings in the workshop. If only one bearing of the trimmer gearbox has collapsed, both bearings must be replaced anyway. Or, as an option, replacing the trimmer gearbox assembly - select the gearbox according to the diameter of the pipe on which it will be clamped along the splines of the drive shaft (square, star, hexagon). Do-it-yourself repair of petrol cutters is similar to repairing a trimmer.
PS: After replacing bearings in the trimmer gearbox or replacing the gearbox assembly, be sure to fill the gearbox housing with grease (required good lubricatione.g. Husqvarna) through the hole in the gear housing from a tube of grease or from a syringe (without a needle) if the filling hole is very small.
Repair of petrol cutters: how to restore the performance of a jumped out starter spring
Trimmer malfunction: The trimmer starter cord stopped returning to the starter housing when trying to start the engine. The malfunction of the brushcutter is the same as that of the trimmer.
Cause of malfunction: The end of the spring in the trimmer starter jumped out and the pulley jammed.
Disassemble the starter, drill a hole where there is a recess for fixing the end of the spring, thread the wire, insert the spring, lay one coil, tie the wire thus fixing the spring end that has jumped out, lay all the coils of the spring, bend the end of the spring inward to engage with the groove on the other part. After that, lay the washer, spring, part with two antennae, tighten the central screw, insert the cord through the hole into the inside, tie a washer at the end to secure the end of the cord, lay the cord, check the operation of the starter and the return of the cord into the trimmer starter housing. Do-it-yourself repair of petrol cutters is similar to repairing a trimmer.
Trimmer maintenance using the example of the Husqvarna 333R to prevent trimmer repairs
T.O. trimmer (petrol cutters) we make so that:
- in the heat and under any load, the trimmer motor did not overheat;
- ensure precise carburetor adjustment and, accordingly, optimal operation of the brushcutter engine;
- identify possible defects, fuel leaks and other malfunctions to avoid trimmer repair;
- timely change the spark plug, unreliable bolts, gaskets and other consumables;
- so that the trimmer (brushcutter) has a good appearance;
- so as not to take the trimmer to a service center.
T.O. We carry out the Husqvarna trimmer after rolling out every 40 - 60 liters. gasoline
(depending on heat, dustiness and severity of work).
Trimmer Air Filter Maintenance
I wash the air filter after rolling out the engine every 20 liters of gasoline and before doing trimmer repair or trimmer maintenance.
For service air filter it is necessary: \u200b\u200bremove the foam rubber element of the air filter and wash it with soap in clean and warm water, squeeze and dry (or replace if the foam rubber filter element is old or damaged).
Note: The air filter can be "washed" more often to prevent a drop in power, increased consumption fuel, starting difficulties, as well as unnecessary wear of the engine of the petrol cutter.
Note: If you adjust the trimmer carburetor with a dirty air filter, then after cleaning the air filter, more air will flow into the engine and the fuel mixture will become much leaner, which will lead to poor performance or even engine damage and, as a result, trimmer repair.
Preparing for maintenance and repair of the trimmer
- provide (buy and dilute) a fuel mixture that is common for your trimmer to work (for example, A-95 "Mustang" gasoline from a WOG gas station and two-stroke oil Husqvarna, in a ratio of 1:50) and leave 1.5 liters of clean (oil-free) gasoline to wash engine parts;
- buy a new spark plug: Champion RCJ6Y only - according to the manufacturer's instructions Husqvarna;
- prepare water-washing accessories for T.O. and trimmer repair (~ 7);
- prepare petrol-washing accessories (~ 5);
- buy the necessary Husqvarna bolts and screws for repairing brushcutters (new fasteners);
- prepare thin paronite for the gasket for the trimmer carburetor, 2.7-3 mm "round" fishing line, gear lubrication, clamps, fuel filter;
- provide good lighting, cleanliness of the room and the workplace for trimmer repair (baking sheet for unfolding parts and spare parts, motor support, lining for keys and tools);
- ensure personal performance (if necessary);
- set aside one day off specially for maintenance and repair of the trimmer (petrol cutters)
Start trimmer maintenance and repair
- Add lubricant to the trimmer gear. Remove the metal knife or trimmer head and clean the inside of the driver chuck from grease and dirt.
- Wash everything on the steering wheel, everything on the bar and both protections with warm water and a brush (the protectors of the brushcutters, as a rule, are very "overgrown" with a dried mixture of earth and grass juice, so it is advisable to clean the plastic protections with a metal brush, and then with washing powder and a brush. Rinse and dry everything.
- Inspect everything on the trimmer for cracks, bends, abrasions, distortions, breaks (especially metal knives at the base of the teeth and at the holes and both protections). Reliably eliminate all faults identified on the brushcutter. Remember! - the thickness of the metal is calculated on a computer, therefore fasteners should be tightened only in a service center using a special fastener tightening card with a torque wrench. If you do the tightening of the fasteners yourself, then do not overtighten !, because with strong heating (for example, the gearbox) in the heat with a large load, the metal expands, and the stock of thickness is small and the body may burst (crack).
- Install the trimmer head (T-35) with a 2.7 mm or 3 mm cord of standard length (up to the cutting knife in additional protection) to load the engine to adjust the high speed needle, i.e. the left carburetor trimmer screw.
- Rinse out and drain the fuel from the tank into a bottle.
Dismantling the trimmer Husqvarna 333R (the procedure for disassembling the engine for thus and repairing the trimmer
1. Remove muffler cover - one bolt.
2. Turn the trimmer on the table and remove metal pan (three screws).
3. Remove starter block (this is the air intake of the trimmer engine cooling system) - three screws and two rubber bands!
4. Unfasten the air filter cover and remove cylinder cover (she directs cold air per cylinder) - one bolt.
5. Unscrew the three screws in air filter housing (one short and two long).
6. Carefully disconnect throttle cable from the carburetor.
7. Inspect while everything is dirty - the carburetor on the trimmer and its gaskets, hoses, a tank, a plug for fuel leakage (cracking and leaks).
8. Remove fuel tank with two hoses (very carefully detached with a screwdriver) and four supporting rubber bands (do not loose).
9. Remove carburetor Zama C1Q complete with air filter housing and gasket.
10. Remove with a screwdriver suction button (there, for subsequent installation, you need to make a mark).
11. Turn the carburetor on the trim tab, remove it from the choke rod on the body and then from the other rod.
12. In the new spark plug Champion RCJ6Y (for Husqvarna) set a clearance of 0.5 mm.
Unscrew the old spark plug and install a new plug in the trimmer cylinder!
(an old candle - either throw it away immediately, or clean it, set a gap and prepare to wash it to hide it in stock).
Note: Due to carbon deposits on the spark plug electrodes: interruptions in the operation of the engine appear (the trimmer engine is troit), there is a drop in power, and the engine may not start well.
Note: Carbon deposits on the spark plug electrodes are formed due to improper adjustment of the trimmer carburetor, if there is a lot of oil in the gasoline and when the air filter on the trimmer is dirty.
13. Disconnect shock absorber cover (two side screws).
14. Disconnect barbell from the motor (three end bolts).
15. Remove from the front clutch cover (three end bolts) and inspect the condition of the drum, bearing, clutch spring and weights (check for wear). If necessary, have it replaced by a Husqvarna dealer, or disassembled for washing.
16. Disconnect throttle cable (in two places).
17. Separate from clamp and stowage candle wire and wires to the "jammer", and disconnect jammer wires on the trimmer motor.
18. It is not recommended to disassemble further, as the factory setting of the ignition will be violated! (remember: our task is only T.O. and trimmer repair). Muffler and intake panel it is not recommended to remove it (just check the fasteners!) so as not to damage the tightness of the inlet / outlet and so that dirt does not get into the cylinder during washing.
19. Loosen one bolt and remove shock absorber from the pipe. Wipe the pipe seat dry. Remove the shock absorber cover.
Note: I removed the spark arrestor mesh in the muffler to exclude possible overheating of the trimmer engine due to the mesh clogged with carbon deposits.
Safety technology: Sparks can be emitted from a muffler without a spark arrestor.
Caution !, do not work in dry hay, gasoline or other flammable materials.
Washing trimmer engine parts
20. Cook on T.O. and trimmer repair:
- photo.tray (empty and clean);
- 1.5 liters of pure gasoline, no oil! (to pour twice 0.7 l into the bath);
- a narrow brush with a long hard bristle;
- a pump with a purge tip (or a compressor with a receiver);
- a large, clean rag.
21. Wash in order with gasoline, blow (!) And wipe painted surfaces with a clean (!) rag, including bolts and rubber bands (there are 5 of them):
- trimmer air filter cover and elastic;
- carburetor Zama C1Q (with partial disassembly, and checking the holes with a thin copper wire);
- carburetor and air filter housing, quickly (!), since gasoline dissolves some types of plastic;
- the tank cap, especially the holes and the tank itself (if necessary, take it out of the bicycle spoke with a hook, remove the fuel filter from the tank and replace it);
- cylinder cover;
- trimmer starter block;
- coil wires on the shaft pipe;
- wrap the spark plug cap in cellophane and put it on the spark plug (then wipe it with a dry cloth).
- Thoroughly wash and blow out the disassembled engine (be careful, because gasoline corrodes the plastic parts of the ignition coil), especially thoroughly wash the entire engine cooling system! To avoid overheating under extreme trimmer operating conditions;
- an old spark plug (clean it first, if any) and store it in stock;
- shock absorber and shock absorber cap;
- disassembled trimmer clutch;
- clutch cover;
- aluminum tray;
- muffler cover;
- wash the heads of the bolts and rubber bands (there are 5 of them);
- in the remains of gasoline, wash the tray and brush, wipe and hide.
22. Repeat item 21 (optional).
23. Wash your hands.
24. Inspect all wires and clean connections! (there are three of them?).
25. Halve the throttle trimmer handle, disconnect the throttle cable and pour oil into the cable casing from both sides of the casing with a pipette, constantly moving the cable to lubricate it. Wipe clean and reassemble the gas handle.
The procedure for reassembling the engine when so. and repair of the trimmer Husqvarna 333R
Note:I would be grateful to everyone who expresses their opinion in the comments about T.O. and repair of a Husqvarna trimmer (or compare with thus and repair of a trimmer of another brand).
In this article, we will look at the problem why the brushcutter stalls and how to deal with this problem.
Even very good brushcutters can have starting problems. For example, it starts up and stalls. Most likely, this indicates problems with the filters - air or fuel. If it stalls at idle, then, most likely, the brushcutter has problems with the carburetor, which overheats too quickly and no longer cope with the formation of a high-quality air-fuel mixture.
If the trimmer stalls when you press the gas, that is, when the engine starts to run at high revs, then this indicates a problem with the carburetor or with the fuel filter.
Problems with brushcutters with an air filter will be indicated by the fact that it stops working when the air damper is opened.
Note that the online store "Well Part" offers you for the widest assortment and for the most favorable prices.
What to do if the brushcutter starts up and stalls?
Now let's look at all the problems described above in more detail.
- The petrol cutter stalls when you press the gas.
- The brushcutter stalls when heated.
- The brushcutter starts up and stalls.
- The brushcutter stalls at idle speed.
In principle, there can be a huge number of reasons why the engine of a brushcutter stops working when you press the gas. We will only consider the most common ones here.
Perhaps the air damper is just clogged. And to eliminate the problem that has arisen, it will be enough just to clean the air damper. Also, the engine stalls due to a clogged air filter. To clean it, the filter should first be washed in solvent and then blown out with compressed air.
A similar procedure should be carried out with a clogged fuel filter, which prevents the flow of fuel in the proper volume when the engine speed increases.
The engine can also stall for other reasons. Firstly, the spacer located between the cylinder and the carburetor has worn out, and secondly, the oil seals crankshaft began to suck in air.
We have already pointed out that in this case the problem is in the carburetor. Due to the increased temperatures, gasoline begins to boil in it, due to which the air-fuel mixture ceases to form or its quality is critically reduced.
In addition, this problem may arise due to the fact that the carburetor is equipped with a rotary valve, not a disc valve. If the problem has become chronic, then it should be solved radically - by purchasing a new carburetor with a disc valve.
Most likely, it is difficult or completely absent access to fuel tank, due to which a low pressure zone forms in it, due to which the engine ceases to receive fuel in the required amount and because of this it stops working.
The engine at idle speed can stall for the following reasons:
- Gearbox is too hot
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he got up and began to prepare a not quite normal gasoline solution, because of which the revolutions on the drum began to drop;
- Clogged carburetor;
- The carburetor is incorrectly adjusted;
- The throttle valve is dirty;
- The throttle is open, which causes too much air to enter the carburetor, which makes the air-fuel mixture lean;
- Clogged air filter.
You will need spare parts to fix most problems, and Well Part is ready to provide them to you at the best possible cost.
What to do if the trimmer stalls when you press the gas?
So, why does the trimmer stall when you press the gas? There can be several reasons for this problem.
- The carburetor is out of alignment after an unsuccessful wintering or after too much use of the brushcutter. The petrol trimmer runs on an air / fuel mixture prepared by the carburetor. Incorrect adjustment this mechanism prepares a lean mixture, which is not able to provide the engine with a sufficiently high speed. You can understand the problem with the carburetor by the characteristic vibrations of the brushcutter.
- About clogging fuel filter you will know by the fact that the trimmer starts and stalls. In other words, the flow of fuel is enough to start the brushcutter, but not enough to keep the engine running. It may be possible to solve the problem by loosening the valves on the filter. If not, you should wash the filter in solvents and blow it compressed air... If after that the problem is not solved, then you should purchase a new fuel filter.
- If the engine stalls at speeds close to maximum, then there may be a problem with the breather, which regulates air access to the gas tank. When fuel is consumed too quickly, which is typical when you give gas, a rarefied pressure forms in the gas tank, due to which the flow of fuel into the engine is reduced.
- The engine stalls when the choke is opened. The problem, again, is associated with the carburetor, which, due to excess air, prepares a lean air-fuel mixture, which is not capable of providing engine operation.
Does the benzokos stall when hot? There is a solution!
The petrol trimmer stalls when hot - this means that there is already some fuel in the engine to start the engine, but after 5-10 minutes of operation, it stops working. This behavior of the engine indicates a problem with the fuel filter.
Benzokosa is a mobile high-performance tool for the improvement of personal plots and adjacent territories. With prolonged operation, due to wear of parts or manufacturing defects, malfunctions occur, which lead to the fact that the trimmer stalls or does not start. Since this tool is a rather complex mechanism, there may be several reasons why the petrol brush stalls.
Why does the trimmer stall
There are two main ways to troubleshoot problems: transferring the braid to a specialized center or solving the issue with your own hands. The first option is suitable for those who are ready to pay a "tidy" sum to restore the unit's working capacity, and the second for those who have basic locksmith skills and can independently figure out the causes of breakdowns and ways to eliminate them.
Currently, it is customary to classify breakdowns for which the petrol brush stalls into the following categories:
- mechanical damage to the internal combustion engine crankcase, malfunctions of the cylinder-piston group (CPG);
- breakdowns associated with the supply of the fuel mixture (air filter, carburetor);
- malfunctions due to damaged pipes, hoses, cables or ignition circuit.
The brushcutter stalls at high engine speeds
During operation, a situation arises when, when you press the fuel mixture supply button, the speed of the unit does not begin to increase, but to decrease. A malfunction of this nature can be caused by:
Fuel hoses for brushcutters with filter
- etching atmospheric air into the combustion chamber;
- problems with the circulation of the fuel mixture;
- clogging of the breather in the fuel tank cap (cleaning the hole with a fine sewing needle);
- incorrect carburetor adjustment.
When air leaks at iCE operation it is necessary to check the tightness of the connection of the branch pipes and the integrity of the gaskets in the CPG. The problem with the circulation of the fuel mixture can be solved by removing blockages in the fuel pipes leading to the carburetor. If a vacuum develops in the tank and the fuel mixture does not flow to the carburetor, it is enough to clean the breather with a thin needle and blow it out with air.
Petrol trimmer stalls at idle speed
Often, when the speed decreases, the brushcutter engine stalls and does not maintain idle speed upon restarting. The main reasons for the occurrence of such a breakdown include contamination or misalignment of the carburetor, as well as clogging of the air filter.
The petrol trimmer stalls when idling
If the optimal settings of the carburetor are violated, it is necessary to clean and re-adjust it. Clogging of the trimmer air filter can be dealt with by placing it in a solution with normal household water for several hours. detergent... If self-cleaning did not help to cope with the blockage, then it is better to purchase a new filter element in accordance with the instruction manual.
After carrying out the activities, the user will not face a situation for a long time when the trimmer stalls at idle and functions only when gas is supplied.
The trimmer starts and stalls immediately
Trimmer stalls: causes and troubleshooting was last modified: July 22nd, 2018 by Administrator
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Benzokos stalls
When purchasing a petrol cutter, you need to be prepared for the fact that, like in all other similar tools, breakdowns may appear in it that will require repair.
But you should not immediately run to the service center and pay large sums to the masters who convince you of a severe malfunction in the device.
Benzokosa stalls on high revs on gas
Perhaps the most common complaint related to petrol trimmers is: "The petrol trimmer is stalling."
Naturally, a rather severe malfunction may be a prerequisite for this. The benzokos does not develop speed, the reason is back. But in most cases, the situation is even simpler than it seems at first glance.
To cope with such a problem, first, try to figure out its causes without the help of others, because, having found out the reason, it is even easier to fight with a problem, and from time to time it even self-destructs.
In fact, the circumstances are when the brushcutter stalls on high revs, there are a lot of these circumstances.
Another is the presence of defects in the power supply system.
Trimmer not gaining revs, what to do?
Trimmer not is gaining revs, a very common problem and of course not always has the usual solution.
Gas meter (moto mower) carburetor repair does not work develops momentum, power loss
Description.
In this case, the petrol brush will stall at idle. Benzokos does not develop momentum, the reason | funnydog.tv. Misalignment or incorrect carburetor adjustment can lead to dilemmas with the power supply system.
The misalignment can be caused by vibrations that occur during the operation of the petrol cutter.
Incorrect adjustment of the petrol mowers can be corrected simply by adjusting it in accordance with the requirements indicated in the operating annotation.
In addition, from time to time, gasoline trimmers can stall due to the fact that the valve located in the gas tank cap is simply clogged or stuck.
To find out, try using a scythe by loosening the gas cap.
If the device works properly in this mode, clean the valve.
Moreover, the brushcutter can stall due to the disgusting flow of fuel into the carburetor.
Why then does the device start up, you ask?
Cause This consists in the fact that at first, the fuel gradually runs into the carburetor and it is enough to work at increased power.
But then it is produced and at huge speeds the engine starts to stall.
As for the carburetor, there may also be a discrepancy in the fact that its body is very tight.
The premise that the petrol brush stalls on high revs on gas, there may also be air leaks.
We are talking about the likely presence of a place through which air can pass during the heating of the motor.
In addition to everything else, be sure to check the fuel inlet hose. The trimmer does not develop speed. One of the reasons. The problem may lie in the fact that it is weakly adhered or, in general, cracked.
These are the main prerequisites for why a petrol cutter can stall.
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