Specifications for trimmer contain links to recommended fuels and lubricants. In this case, the octane number of the brand of gasoline indicates the specific, but in part of the oils, there is a lengthy explanation about the need to use the product of a certain manufacturer. For credibility, it is stated that only when these recommendations are implemented, the company extends the warranty. What is it: a marketing ploy or oils from other manufacturers do not meet the requirements? The answer is in this article.
The two-stroke engine has a simple and, at the same time, extremely efficient design:
- the piston makes a working stroke every second cycle;
- the cylinder is lubricated with oil dissolved in gasoline;
- removal of combustion products occurs due to compression, without a special mechanism.
All this led to the creation of a family of small engines, successfully adapted to domestic and professional equipment:
- trimmers;
- chainsaws;
- motorcycles;
- various tillers.
Due to the design features, it was possible to achieve the desired fuel consumption only on small engines with a power ranging from 15 to 20 bp This indicator looks especially good in the range of 1. 5 hp. Here the low weight and dimensions of the engine are fully consistent with the consumption of gasoline.
With increasing sizes, the area of the inlet and outlet channels increases. The process of removal of gases and fuel supply is deteriorating. In this regard, it was necessary to switch to a more efficient system for burning gasoline mixture, which would provide for the existence of networks of necessary engine maintenance. Four-stroke models intercepted a palm among power units of high power. Combining them into multi-cylinder structures allowed the creation of special systems related to the formation of the composition of the fuel mixture, lubricant and other things, which favourably affected the consumption of gasoline.
The lubrication of the rubbing elements of the piston and cylinder of a two-stroke engine occurs with oil, which is in a particular proportion in the composition of the fuel. Gasoline burns and the oil settles on the surface of the cylinder, reducing the friction of the rubbing parts. Lack of lubrication leads to damage to the cylinder, up to jamming. In case of excess, under the influence of high temperatures, there is a deposition of the thermally modified product in the annular grooves — compression drops, and with it power.
Motor oil is used as an additive to trimmer gasoline. Mixing does in a certain proportion. Manufacturers have a different volume ratio: from 1 to 50 to 1 to 20. In the technical specifications, there is a link to this. You should be careful with a small fraction of the participation of oils. A little inaccuracy leads to oil starvation of the engine, reduces its resource.
Some products indicate a proportion of 1 to 20-40. It is better to refuse to use such a lubricant. A wide range of blends means low product qualities. The occurrence of piston rings, with constant use of such varieties, is practically guaranteed.
Engine oils, type M — 8, are added in proportions of 1-20. In high-speed engines, their use is undesirable. The cycle between the feed mixture is so small that it will cause an overabundance of lubricant in the cylinder. Trimmers have small revolutions, therefore, allow the use of low-grade oil. Due to the initially low resource, you can not worry about coking rings. Firstly there will be complete wear of the equipment.
The principle is not the use of recommended oil or from other manufacturers. The main thing. to dilute gasoline with oil with proportions by the characteristics of the product. The refusal of service workshops to guarantee only because of the use of a lubricant of another brand, but with acceptable parameters, is illegal.