Basic Engine Parts - O.S. engine MAX 140RX FI Owner's Instruction Manual

BASIC ENGINE PARTS

Accessories
•Fuel Filter
•Check Valve
•Y harness
•Driver to push EC-1 keys
•Duble-sided sponge-backed
cushioning tape
Crankshaft
Fuel Filter
Check Valve
Y harness
Electronic Control Unit<EC-1>
•The photograph may differ from the actual product.
INSTALLATION OF THE AIR VALVE
As delivered, the engine has its air valve lightly fitted into its intake boss. Secure it as follows.
Loosen the retainer nut, rotate the air valve to its correct position and make sure that it is pressed
1.
well down into the intake boss, compressing the rubber gasket, before retightening nut.
Rotate the retainer nut gently until it stops, then tighten a further 90-120˚.
2.
Do not overtighten the screw as this will damage the thermo insulator.
Never attempt to disassemble the injector.
Injector
It may not be able to be reassembled.
The injector consists of a solenoid valve with built-in regulator. It controls pressurized fuel at a
constant pressure and accurately injects fuel based on signals from the electronic control unit (EC-
Temperature Sensor
RPM Sensor
The RPM sensor is provided with a power generating sensor. When the crankshaft passes in front
of the sensor, the signal that is generated is transmitted to the electronic control unit (EC-1).
Engine speed is then calculated based on that signal which is then used to determine the timing at
which fuel is injected.
Electronic Control Unit<EC-1>
The EC-1 transmits fuel injection signals to the injector to ensure the proper amount of fuel
injection based on basic fuel injection data that has been previously entered and constantly
changes wuth position of throttle stick. In addition, engine speed and engine temperature during
operation are displayed on the liquid crystal display.
This one-way valve's function is to pressurize the fuel tank by crankcase
Check Valve
pressure and prevent fuel from returning to the engine crankcase.
This fine mesh filter prevents foreign matter from plugging the small injector
Fuel Filter
valve.
Y harness
This cord is used to connect the receiver (throttle channel), throttle servo and EC-
Injector Air Valve 70C
Injector
Drive Hub
This measures the temperature of the engine exhaust unit.
(abbreviated as simply EC-1)
6
Glow plug TYPE F
Cylinder Head
Crankshaft
Temperature Sensor
Pressure Fitting
Cover Plate
RPM Sensor