How To Properly Start A Lawn Mower

Instructions: how to start a chainsaw so that it does not fail prematurely?
This article describes how to properly start a chainsaw. What is the best way to turn on and start the device after a long idle time and features of the first start The principle of the device of chainsaws of different brands is described in detail.

Distinctive features of different brands

Some models may have a slightly different starting system. The main difference is in the location of the main elements on the body (the presence or absence of a primer, the number of bolts for tensioning the chain, etc.), as well as in the proportion of the fuel mixture. After purchasing the tool, you should carefully read the instructions, which always indicate the algorithm for the first start-up, running-in and the frequency of preventive measures.

How to start a chainsaw?

In most European models, the starting system and starter have a similar device, mechanism of operation. The exception is old domestic chainsaws (Ural, Lesnik). On the body there is a handle through which a cable is passed. If you lift it, the cable engages with the drum of the ratchet mechanism, several revolutions of the crankshaft occur. At the same time, the fuel is ejected and ignited with the help of a candle, after which the chainsaw starts up. To simplify the start, the following mechanisms can be implemented in high-quality chainsaw models:

  • Installation of a damper in the carburetor for preliminary enrichment of the fuel mixture;
  • Decompression valve, which reduces the working pressure in the engine cylinder;
  • A spring that, during the movement of the cable, simplifies the unwinding of the crankshaft;
  • Additional pump for pumping fuel (usually found in American manufacturers).

The starter motor is constantly subjected to dynamic loading. Because of this, it can fail at any time right during launch. With frequent use of the saw, it is recommended to carry out preventive maintenance at least once a year. It is recommended to replace the cord in the starter only with two people, since it is required to securely fix the spring.

Preparing to launch

Before starting the chainsaw for the first time, check the condition of the saw headset and the quality of the tension of the bolts on the body. After that, prepare the fuel mixture in the proportion indicated by the manufacturer, fill it correctly into the tool tank. You cannot start work without making sure that the device is in full serviceability – this can lead to damage to expensive elements, serious injuries.

Starting the lawn mower for the first time or after a long period of inactivity

A lawn mower differs from a trimmer in that it is not a fishing line that acts as a grass cutter, but a mechanical reducer or a gear-based winch equipped with a knife. The knife drive is much more powerful than the forestry mechanism – a powerful lawn mower is also used when cutting bushes. Both Chinese and European lawn mowers are no different when the declared power is real.

Litol or grease is used to lubricate the gears of the reducer. After checking the gearbox, prepare the motor itself for work – according to the above instructions. If the start fails, the problem is already in the engine.

How to start a petrol trimmer?

how to properly start a lawn mower

  1. Prerequisites
  2. How do I start the trimmer or lawn mowers?
  3. Starting the lawn mower for the first time or after a long period of inactivity
  4. Adding fuel through the spark plug holes
  5. Checking the ignition system
  6. Cleaning the engine
  7. Checking the integrity of the spark arrester
  8. Unstable carburetor operation
  9. Draining fuel from the gas tank

How to start the trimmer correctly is a question that owners are puzzled with in the event of a device breakdown. And after a successful trimmer repair, the owner tries to avoid repeating the same situation.


The reason why the trimmer fails may be:

  • Tank overflow;
  • Excessive pumping of fuel into engines equipped with a manual supercharger;
  • Wear in the motor of valves, cylinders, injectors, cam followers and other moving parts;
  • The tanks are out of gasoline and / or oil;
  • The spark plug is out of order;
  • Clogged fuel or air filters;
  • The valves in the motor are out of alignment or burnt.

How to start a petrol trimmer

The process of commissioning lawn mowers, whether you bought it now or got it after winter storage, the rules listed below will allow you to avoid basic mistakes that can damage the tool.

Let’s say you just bought a petrol trimmer. Take the instructions out of the box and see if you have all the parts listed for the lawn mower. After that you can start building.

Starting a warm engine

It’s very simple. Move the switch to the working position and pull the cord before starting. If you do everything according to the instructions, then there should be no problems with starting a working lawn mower.

Starting lawn mowers with cold engine

To start the lawn mower for the first time, locate the choke lever and set it to the "closed". Turn on the ignition on the handle. If your model has a manual fuel pump, popularly called suction, then press it 3-5 times until you see the fuel mixture inside the primer. The tool is now ready to run. Place the trimmer on a flat surface to ensure a stable position. Pull the starter rope gently until you feel its resistance, and then pull the rope towards you with a sharp movement 3-5 times.

If the engine starts after 5 jerks, open the choke. If this does not happen, open the air damper anyway (if the damper is open and you continue trying to start the engine, the fuel will flood the candle and you will have to dry it, and this is a waste of time).

If the engine does not start when the throttle is open, close it and continue pulling the cord. The first launch can be quite difficult and require up to 15 jerks. After the engine has started to work, press the throttle lever once, so you engage idle. Now let the engine run and warm up. After that it can be stopped by pressing the button. "Stop".

Fuel system tuning

The factory adjustment of the carburetor is carried out according to the averaged parameters, therefore the necessary adjustments to the operation of the fuel system are made during the operation of the chainsaw.

The sequence of self-tuning of the fuel system by the owner himself is given in the instructions. To bring the engine to the optimal thrust and economy of fuel consumption, it is advisable to perform the adjustment using special equipment, which is equipped with service and repair services.

A running engine is checked for interruptions in the ignition system, extraneous noise, crankcase overheating and other shortcomings. Full lapping of loaded parts and assemblies of a new chainsaw is carried out in an operating mode with moderate loads. With short breaks to cool the engine, you can cut wood with a diameter of 100-150 mm.

Reasons for a failed launch

To search for failures typical for internal combustion engines, there are developed algorithms that help to detect and eliminate a malfunction with a small investment of working time.

In a simpler version, this is an excess of fuel in the combustion chamber that makes it difficult to ignite the mixture, an unregulated gap in the spark plug, air leakage in the fuel supply system.

Also, it is not excluded that the carburetor flap control drive is disconnected, the nozzles are dirty and the presence of water condensate in the float chamber.

Engine oil selection criteria

A full-fledged alternative to the recommended branded oils can be products from leading manufacturers that are similar in performance. As a result of natural selection, Stihl and Husqvarna brand motor oils and chain oils have been leading in unofficial consumer ratings for many years.

  • It is strictly forbidden to use cheap analogues of unknown origin for the preparation of a combustible mixture for a chainsaw, as well as motor oils for mopeds and outboard motors.
  • In order to avoid the risks of acquiring a cheaper, but low-quality counterfeit, it is recommended to buy consumables from branded and licensed trade enterprises.

The working mixture is prepared in a small amount, sufficient to perform a one-time job. For long-term use, more than one month, the combustible composition is not calculated due to significant deterioration in performance.

The mixture is poured through a fine-mesh filter or suede into a gas tank, from which a gas line is fed to the carburetor inlet.