ROTAX 125 MAX evo, Junior MAX evo, Mini MAX evo, Micro MAX evo
2.5. Electric starter
By turning the combination switch to "START", the circuit between the battery and the electric
starter will be closed by a relay. The electric starter drives the starter gear on the crankshaft via an
intermediate gear with free wheeling, until the engine starts to run. An automatic switch reset from
"START" to "ON" is integrated.
2.6. Exhaust timing control (125 MAX only)
The engine type 125 MAX evo is equipped with an electro-pneumatic exhaust control. The ERAVE
(Electronic ROTAX Adjustable Variable Exhaust) system is controlled by an electro-pneumatic
valve via the ECU. The vacuum required is provided by the engine crankcase. The required
pressure for opening the electro-pneumatic valve is coming from the engine crankcase.
2.7. Fuel pump
The fuel pump is actuated by the pulsating pressure changes in the crankcase and the pump
transfers the fuel from the fuel tank to the carburetor.
An inline fuel filter (between fuel tank and fuel pump) avoids foreign particles entering the fuel
pump resp. the carburetor.
2.8. Carburetor
The carburetor used is a piston type carburetor with floats. The standard calibration covers nearly
all operating conditions. For extreme operating conditions the jetting of the carburetor has to be
changed to the respective conditions in accordance (see chapter 4.1).
2.9. Intake silencer
The intake silencer incorporates an air filter to clean the intake air. The intake silencer has been
designed for optimum reduction of the air intake noise level and represents a tuned system with
the engine.
The air filter consists of several layers and has been optimized in the area of air passage and filter
effectivity. If soiled or in accordance with the maintenance requirements, clean the filter.
2.10. Exhaust system
The exhaust system is designed as resonance system with an after-muffler and represents a tuned
system with engine.
Page 32/53
Edition 07/2016
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