A.S.E and other delights. Four-stroke ROTAX in BRP snowmobiles

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ROTAX. The two-stroke heart of your snowmobile

When choosing a snowmobile, many people look at its characteristics and parameters, without delving into the features of the engine installed on the snowmobile further than just knowing its power and timing.

However, knowing which model of ROTAX is installed on a BRP , you can get quite useful information that could influence the final choice of a snowmobile. In the current model year BRP Ski-Doo and LYNX snowmobiles : two-stroke 550 F, 600 E-Tec, 800 E-Tec and four-stroke 600ACE, 900ACE, 1200 EFI.

Let's look at two-stroke light engines.

The simplest and most inexpensive two-stroke engine, the ROTAX 550 F, has an almost ten-year history and a legendary, long-lived predecessor, the ROTAX 500 . This is a 57-horsepower air-cooled carburetor engine installed on various snowmobiles in the entry-level price range. Two carburetors accurately dose the mixture, the oil for this engine is inexpensive, and the engine is cooled by a fan and counter-flow of air. Air cooling allows you to operate a snowmobile with such an engine even on ice, since there is no radiator system with coolant, which requires sufficiently soft snow under caterpillar This motor was installed on all classes of Ski-Doo and Lynx : single-seat “sports”, mountain, touring and utilitarian snowmobiles.

The ROTAX 550 F currently installed on the most popular utility and light utility snowmobiles. Its features include the presence of a “choke” that requires careful attention when starting a snowmobile in cold weather, the absence of an anti-theft electronic system DESS and an engine temperature sensor, as well as increased fuel and oil consumption. Since the engine is carburetor, no electronics or advanced technologies are involved in mixture formation. When purchasing a new snowmobile with such an engine, it is necessary to additionally add half a liter of oil to the first full gas tank so that the engine receives additional oil supply during break-in. As a result, in the first tens of kilometers, the smell of exhaust and smoke from the exhaust pipe of a snowmobile can cause discomfort. However, many people buy these snowmobiles for infrequent riding in the country and winter fun on the weekends, since in this case, with the low price of the snowmobile and low operating costs, this is an excellent economical option to join the snowmobile community.

The next motor model is ROTAX 600 E-Tec . This 117-horsepower engine, equipped with exclusive E-Tes ​​technology, has repeatedly won prizes from various snowmobile publications and expert communities. It has an excellent balance of weight, power and efficiency, allowing it to occupy a confident middle ground in snowmobile engines. This two-stroke engine can be found throughout the entire segment of all Ski-Doo and Lynx . And narrow-track touring snowmobiles, and all kinds of cross-country and mountain snowmobiles, sports racing, wide-track work-utilitarian models, light utilitarian snowmobiles, as well as utilitarian-touring class snowmobiles can be equipped with such an engine under the hood.

The advantages of this snowmobile engine include a whole list of parameters and characteristics.

The most modern oil supply system, which, using oil pumps, directs oil not to the cylinders themselves, but only to their walls and crankshaft, that is, the places that need lubrication during operation of the snowmobile engine. Thanks to this, precise electronic control of oil supply, depending on load and engine speed, allows this engine to surprise you with smokeless exhaust and impressive efficiency in oil consumption - up to 1 liter per 400 km! The fuel supply by the E-Tes ​​injection system also deserves attention. The asymmetrical surface of the pistons and layer-by-layer combustion of the mixture in the cylinders, along with extremely precise dosage of fuel injected under enormous pressure, gives the E-Tec snowmobile engine ideal operating stability throughout the entire range, including idle speed. And at idle speed, the fuel and oil consumption of the 600 E-Tec will correspond to a 200 cm3 engine! The ability to start a snowmobile with such an engine in cold weather from the first press of the starter button or from the first pull of the manual starter is also a merit of the BRP . All Ski-Doo and Lynx equipped with motors with E-Tec technology start even without a battery from a manual starter with amazing ease, regardless of temperature and idle time.

Another feature and advantage is the self-preservation of snowmobiles with ROTAX E-Tec . Press a few buttons and the snowmobile is ready for summer storage. And if there is sudden snow again, go for a ride! After all, preservation only takes three minutes.

The E-Tes ​​motor is incredibly compact and lightweight, compared to four-stroke engines with the same power. Due to this, it is installed in the snowmobile directly under the steering column as close as possible to the driver’s knees. This snowmobile ultimately has excellent weight distribution and handling. The engine power of 117 horsepower is enough for any job. A snowmobile with an E-Tes ​​engine is not afraid of overturns, battery discharge, or severe night frost. Possessing high autonomy, easy and reliable starting, this snowmobile is ready for long journeys and tests.

The most powerful motor in this family is ROTAX 800 E-TEC . It appeared several years ago and immediately announced itself with unprecedented power. First at 151 hp, then at 155 hp, and now all 164 horsepower!

Lightness and power, all the advantages of the E-Tes ​​injection system have definitely prepared for it a place in racing and mountain snowmobiles. And since last season, this motor began to be installed in top-end snowmobiles Ski-D00 and Lynx of the utilitarian and tourist-utilitarian classes.

Engine characteristics

Suspension

Specifications