4-stroke gasoline engine - reliable, unpretentious equipment in operation. On flat areas, the advantages of such lawn mowers over brushcutters and trimmers are immediately apparent. The productivity is higher, the lawn is mowed more evenly. Knowing some of the nuances in the operation and maintenance of lawn mower engines will allow you to get real pleasure from the trouble-free starting and operation of this technique. Let's take a look at the example of a Viking MB 448 lawn mower with a Briggs & Stratton 500E OHV engine (see Figure 1). A similar device and mowers huskwarana (r53sv, r152sv, lc56, lc 56b), oleo-mak. You can read more about choosing a lawn mower.
Sometimes, after checking the condition of the mower blade or cleaning the body around the blade, the exhaust from the muffler suddenly turns black, the lawn mower starts " sneeze"And go deaf... Check the status air filter... An oiled filter indicates that the mower has been tilted towards the carburetor and oil from the engine crankcase has entered the carburetor and air filter. Therefore, always when cleaning or replacing the blade, tilt the mower to the side opposite to the carburetor, or to the side rear wheels lawn mowers (see video).
How do I clean my lawn mower properly?
For proper cleaning of branded mowers, we recommend watching the video below.
To eliminate the consequences of improper tilting of the lawn mower, for a start replace the air filter, remove the spark plug and clean the spark plug electrodes from soot... Prime the carburetor vigorously with primer. Try to start the engine and let it run for 5-7 minutes until the black smoke disappears from the muffler. If after several attempts to start the engine it is not possible to go to a service center to clean the carburetor.
Ymka 17-06-2018 16:46
There are two lawn mowers in the country. The first castle curtain (sort of Italian). The second honda hrx 476. Honda recently began to freak out. On a cold start from the first or second time. After it has worked for 10-15 minutes, and it stalls, or you drown it, then you will not start it for 10-15 minutes. I did not find any adjustments. I tried to open the lid of the gas tank, it seems like they write in the internet that benz can do bad things. Nothing helped.
Castle Garden works without interruption at all. Even though she's already torn apart.
BIJO 17-06-2018 19:03
this is a feature of OHC engines with overhead camshaft
V.G.life 17-06-2018 19:24
It looks like mine with a two-stroke engine of the Cyfareli leaf blower. I started it, pogazoval chasing the mowed grass from the sidewalk, after 15 minutes I drowned it out - and you'll start it. The next morning, it starts up. But when the engine is running, there is some kind of instability, especially at idle. Probably a carburetor? Opening the gas cap does nothing.
DIZZI 17-06-2018 20:12
1 overheating
2 rich mixture
3 ...
TSV 17-06-2018 20:42
quote: Originally posted by V.G.life:
with two-stroke engine
I started it, pogazoval chasing the mowed grass from the sidewalk, after 15 minutes I drowned it out - and you'll start it.
there may be an excess of oil in the fuel. rings lay down
SergeyK76 17-06-2018 21:38
the first try to change the candle the second can the brain rosin the module
Ymka 17-06-2018 22:00
quote: Originally written by SergeyK76:
the first try to change the candle the second can the brain rosin the module
I'm already at home. In general, how much does a candle cost there? Can I unscrew the heads or buy a candle wrench? Was somewhere from the fourteenth vase.
1 overheating
2 rich mixture
3 ...
It works for 10-15 minutes, then the brain starts to do it. It seems to me not enough for work.
The revs work normally, without any complaints about the work of the engine at all.
The lawn mower is 2 years old.
I changed the oil last summer. I watched the knife in what condition. Seems to be OK. But it seems to be throwing the grass, and not throwing it into the bunker. Zdavižka is worth sending to the bunker.
quote: Originally written by BIJO:
I also have a Honda only UMK435T, 4-stroke mower. And also at one time she was a freak.
Until I understood a simple thing. There is an oil gauge there, and it muffles the engine if it seems to him that there is not enough oil. Then the capacity will stand, the oil will drain and work again. So fill the oil up to the maximum level and everything will work OK.
this is a feature of OHC engines with overhead camshaft
OK. THX. I'll try.
Looked oil was somewhere in the middle on the dipstick. But this is already on the muffled just now.
TSV 17-06-2018 22:06
quote: Originally written by Ymka:
I won't get into the module, but I also thought to look at the candle. The candle key was not at hand.
I'm already at home. In general, how much does a candle cost there? Can I unscrew the heads or buy a candle wrench?
into the module and not get in. they are usually flooded
you can unscrew it with a key or a head
if possible, work to warm up. then, when it does not start, unscrew the candle, attach it to the block and start. whether there will be a spark on the candle or not
if so, it's not the module
DIZZI 17-06-2018 22:07
How to reduce the rich mixture? I did not find any adjustments.
https://www.honda.co.ru/Projec..._476_VKE_RU.pdf
Write to ask professionals
3rd air filter clogging (can cause mixture enrichment)
Ymka 18-06-2018 12:32
quote: Originally written by DIZZI:
3rd air filter clogging (can cause mixture enrichment)
The filter looked. Clean as a baby's ass.
I will try.
p-f 18-06-2018 01:25
quote: How to reduce the rich mixture? I did not find any adjustments.
flush the air filter and / or replace / flush the carb gasket
convincing in the presence of O-rings on the intake manifold
Gruch 18-06-2018 10:41
I had a similar effect on my chainsaw. After I was convinced that the matter was not in the carb and not in the filters, the ignition coil was changed. She somehow got hot, they didn’t understand.
SergeyK76 18-06-2018 10:53
quote: Originally posted by Gruch:
changed the ignition coil
in scientific terms, she is a module and is called
TSV 18-06-2018 11:23
another question is the module is to blame
therefore it is necessary to check hot. unscrew the candle and quickly check for a spark
SergeyK76 18-06-2018 12:28
another question is the module is to blame
quite right
TSV 18-06-2018 12:41
wire with neon
no one looked what was done there?
SergeyK76 18-06-2018 12:48
quote: Originally written by TSV:
the repairers have an ignition tester
wire with neon
is placed in a circuit break and by the glow of the neon you can see what is the power of the spark.
one-time twitches are expressed in the form of separate sparks. when the car is running, it burns with a bright constant fire
neonka (with a resistor) just in parallel with the wire is it?
no one looked what was done there?
some kind of nonsense told you I can throw off a photo of this pribluda, it is used in order to immediately exclude a module defect and that's what I never did, I never started the unit on it, so I can't say about the glow
TSV 18-06-2018 12:58
why did you say it?
but how it flickered on a working ignition and on a buggy one - the difference is immediately visible visually
SergeyK76 18-06-2018 13:21
quote: Originally written by TSV:
why did you say it?
i saw this cable at the repairman Shtiley. and launched on it with a working module and with what was in question
the cable is flooded, so you can't see what and how is connected there
but how it flickered on a working ignition and on a buggy one - the difference is immediately visible visually
absolutely right, I have the same one, but somehow I have never run on it
TSV 18-06-2018 13:33
on the pictures there is a 62MΩ resistor
SergeyK76 18-06-2018 13:44
quote: Originally written by TSV:
you can look into the hole, how was it soldered there?
on the pictures there is a 62MΩ resistor
i looked in the markings there is a cone and there is a posting
TSV 18-06-2018 13:47
but how is that connected there?
can I ring something?
do the wires go directly from the ends to the cutter? Or is there an induction coil made of wires?
SergeyK76 18-06-2018 14:15
quote: Originally written by TSV:
the resistor is colored with stripes. on an Internet I looked at the denomination on the photo
but how is that connected there?
can I ring something?
do the wires go directly from the ends to the cutter? Or is there an induction coil made of wires?
this is probably a question for the manufacturer of this pribluda, they do not bring this information to us since it seems to be nothing
TSV 18-06-2018 14:29
if you have time and desire, please ring the ends of the wire on the neon and on the rezyuk
there may be 2 options - the wires are soldered, and the wires are wound on the main one (inductive pickup)
Apiary 18-06-2018 19:40
I'll throw in my 5 kopecks - there was a similar glitch on the car on the ignition coil - the low wiring in the compound broke off, and there was such a similar effect - it worked fine on a cold engine, when it was heated it started to troit. When it cooled down, it started up as if nothing had happened. Just take the ringing of the heated coil and understand.
TSV 18-06-2018 20:10
now semiconductor modules
therefore it is useless to call them.
unless there is exactly the same one nearby to compare
and that is not an option that will be the same. parameters may be different. and the module will be working
Ymka 19-06-2018 08:52
quote: Originally written by TSV:
another question is the module is to blame
therefore it is necessary to check hot. unscrew the candle and quickly check for a spark
In more detail.
Warmed up the mower, drowned it out, took out the candle and jerk the starter?
skycat 19-06-2018 13:08
quote: Originally posted by Ymka:
took out a candle
after that, you need to put the candle on the engine body so that there is contact between the body and the candle itself. You can fix it with a wire so that it does not fall off when you pull the starter.
p-f 19-06-2018 13:22
quote: Warmed up the mower, drowned it out, took out the candle and jerk the starter?
just look at the candle. if the insulator of the central electrode is white and without carbon deposits, then everything is in order. the spark you will not really see, because it is dead there.
last year posted a photo in a similar topic - dviglo began to mow down due to a crack in the intake manifold.
SergeyK76 19-06-2018 13:28
h for cracks in the intake manifold.
in theory, it should not have started at all in best case sneeze
p-f 19-06-2018 13:53
it started up and worked, but as at a later date. first I put another reel from the old mower, then a gasket under the carb. and only then found a crack. it turned out to glue with superglue with kevlar
SergeyK76 19-06-2018 14:13
quote: Originally posted by p-f:
although it was written off. it did not start
this is how it should be, and even if glued it still shouldn't have worked for a long time to fall off, there should have been this sight somewhere the mower is standing
p-f 19-06-2018 17:42
works well. about a liter per 10 acres by self-propelled.
crap to do with lumin is not a problem.
Sterm 24-06-2018 08:59
If there is a metal casing on the tip of the spark plug wire, try to throw it out, it helped me. The same bad start on hot.
Ymka 24-08-2018 13:11
The conclusion is about the following, in my little experience - the gasoline that was poured into the lawn mower was purchased two months before the problems occurred. Bought new gasoline and the problem went away.
Specifically jammed and started several times. He worked, then again drowned out and started. Everything works.
Either octane number dropped, or something else that happens to gasoline after a while.
By the way, the mother-in-law's canister was leaking, put it in and said not to carry it anymore, and not buy a lot of stock. He singled out his own.
Lately petrol trimmer acquired the status of one of the main tools in the arsenal of summer residents. And this is not surprising, because the motorized scythe allows you to quickly put your personal plot in order. However, it sometimes happens that the trimmer is even cold. In such situations, you have to independently determine the cause of the malfunction. Let's figure out what to do if the trimmer won't start. The reasons that most often lead to such troubles will be discussed below.
Troubleshooting strategy
Where to start troubleshooting if the trimmer won't start? In situations where the tool stalls immediately after starting, it is worth inspecting the following units of the unit:
- fuel tank;
- spark plug;
- fuel and air filter;
- outlet channel;
- breather.
It is the breakdown of the above locations that most often leads to the fact that the trimmer does not start well. Let's take a look at how to eliminate such troubles.
Checking the fuel mixture
Let's say your trimmer won't start. In this case, the first step is to check if there is enough fuel in the tank, and also to assess the quality of the fuel mixture. Filling the motorized unit must be done exclusively quality gasoline... It is recommended to use fuel, the grade of which is not lower than AI-95. Filling the trimmer with fuel of unknown origin not purchased from gas station, is fraught with frequent malfunctions of the tool. This can cause damage to the piston-cylinder system. In this case, repairs often exceed the cost of the device itself.
Why won't the petrol trimmer start? Improper preparation of the fuel mixture, which consists of oil and gasoline, can also lead to this. The proportions in which these components are connected are indicated by the manufacturers in the trimmer instruction manual. It is highly discouraged to prepare the fuel mixture in large volumes, that is, for the future. Indeed, with long-term savings, there is a loss of the defining properties of the substance. Therefore, if the trimmer does not start, it is worth draining the old fuel and using a freshly prepared fuel mixture.
Diagnostics of the candle channel
What to do if the used fuel mixture in perfect order, but still The reasons for the failure of the mechanism may lie in the excessive moistening of the candle channel. To diagnose and fix the problem, you must do the following:
- Unscrew the candle. Wipe it thoroughly and then dry it.
- Drain off excess fuel in the chamber through the appropriate plug hole.
- Clean old spark plug if there is carbon deposits on its surface. To cope with the task will allow the use of a regular ladies' nail file or a file.
- When installing the element in place, set a gap of 1 mm. To check the parameter, it is enough to place any coin in the gap.
- Assemble the functional block back.
- Try to start the trimmer.
It is recommended to dry the candle channel for at least half an hour. However, in no case should you resort to calcining its elements. After all, heating the spark plug can lead to its final damage. What to do if the function block was serviced in accordance with the above recommendations, but the trimmer does not start, there is still a spark? In this case, it is worth treating with gasoline. threaded connection... The latter does not need to be abundantly impregnated with fuel. It should only be slightly damp. Such actions should be taken to ensure ignition. After all, no matter how strong a spark the candle gives, there will simply be nothing to ignite in an absolutely dry chamber.
If, even in this case, the trimmer does not start, it is worth assessing the quality of the contact between the high-voltage wire and the candle. In the absence of a spark (if there is a reliable connection between these elements), most likely, the problem is caused by a breakdown of the ignition unit. In this situation, you will have to turn to the services of wizards who will reinstall the node.
Filter check
Another common reason the trimmer won't start is if there is a blockage in the filter area. To confirm the guess, it is enough to dismantle the indicated block and try to start the unit without it. If the trimmer engine starts, most likely you will have to replace the air filter or at least thoroughly purge the old one. If there is abundant dirt on the surface of the filter element, a new mesh must be used. When resorting to such actions, do not leave the suction pipe completely without a filter. After all, haste in this case can lead to the need to repair the entire piston group the engine of the unit.
Breather cleaning
Often, the engine of branded trim models stalls as a result of a clogged breather. The main task of the specified component is to equalize the pressure in fuel tank... In case of contamination of the unit, a vacuum is formed here, which significantly complicates the supply of fuel. The problem can be eliminated by cleaning the breather with a regular sewing needle.
Outlet duct diagnostics
Stable trimmer performance can be compromised by build-up of dirt in the exhaust duct or blockage in the muffler mesh. This problem most often occurs during the operation of older generation trimmer models. The issue is solved by dismantling the anti-spark grid and cleaning it.
How to prevent sudden breakage during trimmer operation?
In order for the unit to always be in a functional state, it is worth following a few simple rules:
- Conduct timely, regular technical inspection the main mechanical components of the device.
- Fill the trimmer with only fresh fuel, the quality and origin of which is beyond doubt.
- After each use of the tool, check whether oxides and carbon deposits have formed on the surface of the ignition system components.
- Avoid putting heavy stress on the trimmer during work.
In order for the unit to remain in working order, it is necessary to properly prepare it for storage in winter period... First of all, you should completely disassemble the instrument, and then flush and clean the constituent elements. It is also important to inspect functional blocks for damage, if necessary, eliminating deformations of parts, all kinds of distortions, gusts of materials.
When storing the trimmer, it is worth filling the gearbox with enough oil. Then you need to clean the air filter, partially disassemble, blow out and rinse the engine of the unit. After drying all mechanisms, the moving elements should be lubricated. To process the piston system with oils, you must first remove the spark plug. Then you need to move the piston to the extreme position, then pour a small amount of oil into the plug hole and scroll crankshaft... If you do not plan to store the petrol trimmer in the off-season in the house, it is recommended to tightly wrap the engine of the unit with an oiled rag. This will avoid the development of corrosion on the surface. important nodes mechanism.
Finally
As you can see, there are a number of reasons why the gasoline trimmer may not start. However, with a serious approach to the task, the malfunctions indicated in the material can be easily eliminated by hand. It is worth seeking help from specialists only in case of critical breakdowns. Ultimately, you should always correlate the cost self repair with the prices for servicing the unit in the workshop.
Despite the rather wide selection lawn mowers with different operating principles, gasoline mowers do not lose their popularity. They have earned respect among users for their power and autonomy.
For a comfortable work process and no breakdowns during operation of a lawn mower, like another garden equipment similar action: trimmers, brushcutters, the first start is very important. Failure to pay sufficient attention to preparing the equipment for use, this can affect the quality of work or lead to damage to the unit.
Starting the lawn mower
Before starting the gasoline lawnmower, a visual inspection should be carried out for visible damage. The process of starting the unit is conventionally divided into several stages.
Fuel mixture preparation, refueling
If the mower is started after winter, the contents of the tank are checked: if there is unused fuel, it must be drained. Then you can start refueling the equipment. It is important to know some of the nuances here.
For refueling two-stroke engines it is necessary to use a fuel mixture. It can be purchased ready-made or prepared by yourself. There is nothing difficult in preparing the mixture, but you need to adhere to the necessary proportions.
Petrol lawn mower Oleo-Mas
When using synthetic oils, a ratio of 1:50 is used - for 5 liters of gasoline, 100 g of oil.
Using mineral oils the proportion is 1:35 - 100 g of oil per 3.5 liters of gasoline.
Refueling a four-stroke engine does not require fuel mixture preparation. A special crankcase for oil is provided here, gasoline is poured separately. It is important to remember that the oil also needs to be changed, depending on the intensity of use of the mower. Basically, you need to change the oil every 50 hours or at least once a year.
Important! Lawn mowers perform well with an oil with an SAE-30 viscosity index. In addition, if the engine was run-in synthetic oil, in the future it cannot be replaced with mineral and vice versa.
As for gasoline, Chinese, Japanese and american production work well on A-92 fuel, for European models it is better to use gasoline with a high octane number.
When refueling the mower, make sure that the gasoline level is 2-3 cm below the edge of the fuel tank.
Starting cold engine
Before starting an unheated lawn mower, the transmission, ignition system is turned off, and the motor shaft is scrolled with a starter or starter cord.
If the mower does not start, you will have to carry out a number of other manipulations:
- The damper remains closed, the ignition is on;
- The button is pressed fuel pump (suction) about 5 times;
- An attempt is made to start the engine.
In case of repeated failure, you should:
- open the flap to prevent the candles from flooding;
- turn the shaft with the starter;
- blow out the combustion chamber;
- start the engine.
Sometimes it may take about 15 jerks to start the motor for the first time - this is quite normal for this technique.
When the engine starts, the throttle lever is squeezed out once to use idle. Further, the lever is set to the position corresponding to low revs... Run the engine in this position for about 5 minutes to warm up. If necessary, its operation can be stopped by pressing the "Stop" button.
Starting a warm engine
Starting a preheated motor is much easier and no longer requires such efforts:
- the control handle is set to the "maximum fuel supply" position;
- the engine starts;
- the desired speed is selected.
You can get to work.
Startup errors
The most common mistakes when starting a gasoline lawn mower are:
The main breakdowns of petrol cutters
Despite the large selection of manufacturers and the variety of models, the reasons why a Makita, Honda, Husqvarna or other lawnmower won't start is the same for everyone.
The main reasons why a gasoline lawn mower does not start, or does start, but immediately stalls, may be problems with the ignition, carburetor, filters.
If the filled fuel and fuel mixture are of good quality and in the required quantity, the air damper is closed, the lawn mower starts up and immediately stalls, the reason may lie in the following malfunctions:
- Defective or flooded spark plug. In this case, unscrew the candle, dry well and clean thoroughly with a nail file or file. Excess fuel is drained, the spark plug hole is dried. A gap of 1 mm is set, and the candle is screwed in again.
Important! It takes at least half an hour to dry the channel.
- Dry threaded connection. It should be lubricated with gasoline so that the spark can ignite.
- No spark from a candle. In this situation, the contact of the candle and the high-voltage wire is first checked. If the contact is normal, and the mower makes a pop and stalls, there is an ignition problem, and you cannot do without a service center.
These breakdowns are frequent reasonswhy the Husqvarna lawnmower won't start.
Quite common causes of garden equipment breakdown, including why the Honda lawnmower won't start, are air and fuel filter problems:
- Clogged air filter. If the first possible reasons were not confirmed, and the mower still stalls, you can remove the air filter and try to start the machine without it. If the stalled engine starts, the reason is in it. The filter should be cleaned or replaced with a new one.
- Contaminated fuel filter... Another possible variant diagnostics. The filter element is inspected and, if necessary, replaced.
Important! It is highly discouraged to operate a lawn mower without a filter element.
- Breather contamination. With its help, the pressure in the gas tank is regulated. If the breather is blocked, a vacuum is created and the fuel supply stops.
The following breakdowns are more serious and without certain skills it is not easy to cope with them. There are problems in carburetor malfunctions:
- Contamination of jets and channels. Washed out special fluidsblown with a jet of air from the carburetor.
- Worn gasket. It is being replaced with a new gasket.
- Damage to the tightness. Diagnostics is carried out using a tonometer. If the pressure is stable, everything is fine, it drops - you need to find and replace the damaged element.
Another breakdown option is a malfunction of the piston group. Worn or damaged pistons should be replaced.
Petrol lawn mower Vityaz BG-4900
Rules for operating a gasoline lawn mower
Like any technique, the mower needs some care and basic principles of use. These rules are simple, but they will help keep the unit working for a long time.
General operating rules:
- Read the instructions for using and caring for the lawn mower, study the basic rules of operation, storage and safety precautions.
- After each use, clean the body, channels, grass catcher, knives, preferably with the use of special liquids.
- Do not clean the mower with a hot engine.
- During operation, monitor the condition of the engine, do not let it overheat, take breaks.
- If the mower is in operation for long periods (about a month), drain the fuel. In this case, at the end of the work, the device is given the opportunity to work on idling and die out.
Rules for preparing equipment for winter:
Safety regulations:
- Before starting work, the working area is checked for foreign objects: stones, branches.
- The presence of unauthorized persons at a distance of at least 5 m from the mower is not allowed.
- The work is carried out in special glasses.
- A visual inspection of the mower is carried out for damage, loose parts. Malfunctions are eliminated.
- You can mow grass, no higher than 20 cm, no more than a third at a time.
- When working on slopes, drive along the slope, not up and down.
- The engine is stopped before changing the miter height.
- If foreign elements enter the mower knife, the work stops, the knife is cleaned.
Petrol lawn mowers have earned the respect of users for their power and quality of work. In order to extend the durability and performance of the unit, you need to study all the intricacies of care and maintenance of the lawn mower, follow the safety rules, adhere to the operating instructions for this equipment.
The main thing in using any garden equipment (and equipment in general) is compliance with all operational requirements, as well as timely maintenance... Only under these conditions will the petrol lawn mower work properly and for a long time. However, unforeseen situations do happen, and one "fine" day, the device may stop starting. Today we will find out why this is happening and how you can fix this kind of problem.
Common breakdowns and how to fix them yourself
If the mower does not want to start, then first of all check if there is any gasoline in it. If not, top up to the required level. The fact is that if the device is idle for a long time, the gasoline is "exhausted" from it, therefore, it must be drained and replaced with a new one. Do this carefully so that fuel does not spill onto the engine (otherwise it may ignite).
Note! If you are not sure which gasoline should be used specifically for your lawn mower model, find the relevant information in the data sheet.
By the way, if you are just planning to buy a gasoline lawn mower or any other garden equipment, we recommend that you visit the site gardenmoto.ru. There you will find the widest assortment of products. reasonable prices... But back to the reluctance of the device to start up.
So, next reason, for which a similar problem may arise, lies in the incorrect position of the air damper when making the first start. Based on the air temperature, this damper either closes completely or rises to the middle position (if the temperature is 30 degrees). After that, it should be opened in its entirety.
We also recommend inspecting the air filter to see if it is dirty. To do this, turn on the mower and disconnect the cable from the spark plug. Remove the cover, remove the filter, wash it with gasoline and dry it thoroughly (or, alternatively, put a new one).
Note! The air filter should be replaced on average every 25 hours of use. Remember this!
Finally, the last reason is a faulty candle (by the way, it may just be filled with gasoline). To find out, unscrew it, clean it and check for a spark. Next, close the choke and try to start the engine. If this does not work, you better trust an experienced professional.
Video - The Lawn Mower Will Not Start
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