Engine powers according to different standards - dishonest sellers
Internal combustion engine-powered equipment provides information on engine power, which
may have different values despite the description of the same model or engine type - depending on who
publishes this information. Vendors often overestimate the power, using various terms - maximum power
effective, maximum starting/starting power, perceived maximum power and similar names.
Such terms are not reflected in any standard or technical description used by the
serious engine manufacturers. These are just terms and names to encourage buying from that particular one
salesmen and nothing more.
Power measurements of internal combustion engines are carried out in accordance with several standards, most
popular ones are SAE 1349 (e.g. Loncin, Honda), SAE J1940 (e.g. B&S), SAE J1995. The most common are given tzw.
net powers - in accordance with SAE 1349, or so-called gross powers in accordance with SAE J1940. Net power values
are measured with the exhaust system and air filter installed, while gross power values are
measured without these elements. The gross power of the engine will be higher than the net power of the engine - hence there may be
different values for similar engines. An honest seller will state the standard by which the power was determined
engine, a dishonest one will use other pseudo-technical terms.
There is one more detail worth noting - the factory-set speed
of the motor in a particular device. Practically, except for liquid pumps and compressors, maximums are not used
engine revolutions. For design reasons and the need to meet standards such as noise, many devices
has a factory-reduced maximum engine speed. This is an intentional action of the device manufacturer, which
decides at what rpm you want the engine to run - so you must not change the factory settings of these
turnover.
For example - Loncin LC1P92 engine (widely used in tractors) has a maximum power of 9.2 kW
at 3,600 rpm, but in the Cedrus AJ92 tractor it has a power output of 7.8 kW at 2,700 rpm - because these are the factory's
maximum rpm for this device.