How not to get confused if you do not get a petrol pump

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The tool, despite its small size, is a complex technical device. If you study the instruction manual, it turns out, the reasons why the petrol pump is not started are known and eliminated. You need to consistently exclude factors that make it difficult to start the tool. Usually, they start with more accessible nodes with an easy maintenance check.


All the reasons why a petrol pump can not be started can be classified according to the specifics of the operation of individual units. In the service center the faults are classified:

  • engine malfunction (piston wear, bearing failure, crankcase crack);
  • malfunction of feeding the fuel mixture - clogged pores of the air filter or malfunction of the carburetor;
  • the ignition system does not work;
  • mechanical failure - leakage of hoses, broken wires under braid, rupture of pipes.

The user first needs to check whether there is fuel in the tank. Start up in accordance with the instructions, putting the saw on its side. The air damper should be set to the "closed" position, to fuel the fuel, to switch on the ignition and to make 3-4 sharp jerks by the starter. If the engine has started, open the air damper. Do not start a gasoline pump - repeat operations with a slightly open air damper.

Motokosa can not work long. The gearbox and the motor will overheat. Mowing can be no more than 15 = 20 minutes, making a five-minute break. In the hot noon, the work time is halved. When cutting weeds, sedge, the work time needs to be shortened.

If the startup fails, we begin to search for the reason for the failure:

  • check fuel quality;
  • to ensure the candle's efficiency and purity of the candle canal;
  • check the cleanliness of the air filter;
  • make sure that the fuel filter is not blocked;
  • check the purity of the breather;
  • clean the discharge channel.
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More complex reasons will be found in the diagnosis of a malfunction leading to a major overhaul of the carburetor. For such reasons include clogging the internal channels of the carburetor, wear on it gaskets and breach the integrity of the internal halls with the loss of vacuum. Repairing the gasoline pump yourself, if it does not start, will require patience.

Elimination of reasons for not getting a petrol pump

The fuel mixture must be prepared with the exact observance of the proportions of gasoline and oil. In this case, you can not use another brand of fuel. To prevent dirt from entering, gasoline should be left in a glass or metal container for 2 days. Do not use plastic containers for fuel storage. Oil accurately measured with a medical syringe without a needle. Use only freshly prepared mixture, leaving no waste fuel in the tank. If the engine is naughty, the gasoline stalls, when you press the gas, it is probably the fuel that is to blame.

The gasoline does not start on the hot one - pull the trigger of the gas and sharply pull the cord several times until the engine starts working, then pull the trigger. Do not start - requires specialized repair.

Checking the ignition system, if the petrol pump is not started, is carried out in sequence:

  • remove the candle from carbon and dirt, dry, set a gap of 1 mm;
  • connect to a high-voltage wire and check for a spark, several times pulling the starter;
  • in the absence of a spark, check the integrity of the high-voltage wire;
  • replace the candle;
  • to dry the candle canal;
  • At the same time, the work of the ignition coil is checked, it is faulty if the working candle does not spark.

It is in the event of a malfunction that the ignition coil of the petrol pump does not start up hot, stalls, works intermittently.

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Cleaning or replacing the air and fuel filter will ensure the required consumption of ingredients entering the carburetor. The air filter can be washed in soapy water or replaced. If a nylon cloth is used, it is washed, a porous felt filler is replaced. The fuel filter is changed neatly, leaving the suction nozzle open. Whether the replacement of the air filter is necessary, it is possible to determine if the engine with the removed air cleaner will start. Do I need to change the grid on the fuel supply, if the petrol pump does not start, a dry candle will tell you.

A breather, an opening for air intake into the gas tank. If it clogs, a vacuum is created in the tank and the mixture does not enter the carburetor. The hole can be purged with air or cleaned with a needle. The exhaust channel must be cleaned, the anti-leakage mesh of the silencer must be removed.

Adjustment and adjustment of the carburetor

The maximum and minimum engine speed, smooth idling is regulated by the carburetor. The stable operation of the fuel pump depends on the amount of fuel mixture and air supplied, and their ratio. The gasoline can not be started if the carburetor is not adjusted correctly. The order of setting the device for fuel supply at low speed (L), high speed (N) and idle (T) is regulated by the same screws:

  1. Chainsaw should work for at least 10 minutes, since the adjustment is done hot.
  2. Screw the screw H smoothly to maximum revolutions, then rotate by ¼, counterclockwise, reducing the speed of rotation of the motor shaft.
  3. Idling is adjusted with screw T, ensuring that the spit does not rotate.
  4. Screw L is regulated, first opening the maximum throttle, and then gradually reducing the speed to a stable minimum.

After adjustment, a good carburetor with cleaned filters, a proven ignition should ensure the engine operation. In the event of a malfunction of the carburetor, after repair, the feed system must be adjusted again before starting the petrol pump.


Rare breakdowns that prevent the work of gasoline pumps, can be:

  • defective rewinding spring;
  • Broken or stuck pulley starter;
  • defective starter assembly.
Read also:Gasoline 128R from Husqvarna worthy of your attention

The most common malfunction, the elimination of which is associated with the replacement of the engine may be the failure of the piston engine group. The cost of repair will cost approximately 70% of the cost of the product. To understand the reasons why the petrol pump does not start, the video will help:

Proper care for the chainsaw

There are no unnecessary phrases in the operating instructions, everything that is offered is aimed at trouble-free operation of the gasoline pump. Cleaning of all parts after each cycle of work facilitates easy removal of non-hardened residues and dirt. Clean only the cooled nodes. This method contributes to the quality of air cooling of the engine and gearbox.

For refueling, you must use fuel with the recommended oil in the instructions. If the fuel mixture is left in the fuel tank, the oil will float and, upon start-up, land on the damper, worsening its adjustment. The mixture can precipitate and clog the fuel in the carburetor.

When conserving equipment for the winter, carry out an inspection, lubricate the reducer and the piston system, wrap the whole saw in an oiled rag and store it in a dry place.

It is impossible, it is dangerous for the tool and health of the mower, to use a metal cable instead of a fishing line. It cuts more efficiently, but the load on the gear and motor increases. A worn piece of wire flies at the speed of the bullet during detachment. Effective mowing can lead to rapid wear of the engine piston group. For greater efficiency of mowing it is proposed to use the profile of the line "asterisk".

Diagnosis of gasoline pumps and elimination of causes - video

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