Rotax 125 MAX evo Installation Instructions And Operation Manual

ROTAX 125 MAX evo, Junior MAX evo, Mini MAX evo, Micro MAX evo
1. Design of the ROTAX engine types 125 MAX evo, Junior MAX evo, Mini MAX evo and
Micro MAX evo
2.1. Single cylinder two cycle engine, reed valve controlled, 125 cm
3
displacement
2.2. Liquid cooled, forced flow by integrated water pump
2.3. Balance shaft
2.4. Digital battery ignition
2.5. Integrated electric starter
2.6. Pneumatic controlled exhaust timing (125 MAX evo only)
2.7. Crankcase impulse operated fuel pump
2.8. Piston carburetor Dell’orto
2.9. Intake silencer with integrated air filter
2.10. Tuned exhaust with after-muffler
2. Technical description of the ROTAX engine types 125 MAX evo, Junior MAX evo, Mini
MAX evo and Micro MAX evo
2.1. Type of engine
Single cylinder two cycle engine with reed valve controlled inlet. Mixture lubrication is achieved by
adding oil to the gasoline in a specified mixing ratio.
2.2. Cooling circuit
The coolant is pumped from the radiator to the water pump which is driven by the clutch shaft. The
water pump conveys the coolant through cylinder and the cylinder head back to the radiator.
 Attention: The water pump starts working with the engaging of the centrifugal clutch at about
4000 rpm.
The cooling circuit is equipped with a thermostat (opening point 45°C / 113°F). It assures that the
engine reaches its operating temperature quickly and keeps it at a relatively constant level.
The thermostat is integrated in the cylinder head cover.
2.3. Balance shaft
The balance shaft rotates counter-wise to the crankshaft to reduce engine vibration.
2.4. Ignition unit
The control of the ignition system is done by the ECU (Engine Control Unit). To calculate the
ignition timing an engine speed sensor is needed, which is installed on the bottom of the engine
housing. There is no manually adjustment of the ignition system necessary and/or possible.
The electrical circuit of the ignition system is protected against fault currents by a combination
switch. Even if the engine is stopped, the ignition system consumes current. After use, always set
the combination switch to position "OFF", to avoid deep discharge of the battery.
If the combination switch is turned to "ON", the ignition is activated. To start the engine, it only
needs to be switched further to "START" position. An automatic switch reset from "START" to "ON"
is integrated.
Seite/page 71/98 Ausgabe/Edition 11/2014

Rotax 125 MAX evo Specifications

General

Brand	Rotax
Model	125 MAX evo
Category	Engine
Language	English