2010 Polaris Sportsman 850 Service Manual, Page 62Get this manual

2010 Polaris Sportsman 850 Service Manual, Page 62

ELECTRONIC FUEL INJECTION Fuel PumpFuel Tank Installation 1Reinstall the fuel tank assembly through the right sideBe sure
electromagnetically, and the pressure in the fuel rail forces fuel down through the insideThe "director plate" at the tip
of the injector contains series of calibrated openings which directs the fuel into the intake port in cone-shaped spray patternThe
amount of fuel injected is controlled by the ECU and determined by the length of time the valve needle is held open, also
referred to as the "injection duration" or "pulse width"It may vary in length depending on the speed and load requirements
of the engine FUEL INJECTORS Operation Overview The fuel injectors mount into the Integrated Air Fuel Manifold (IAFM), and
the fuel rail attaches to the top end of themO-rings on both ends of the injector prevent external fuel leaks and also insulate
it from heat and vibrationPressure Valve Damper 23456789 Fuel Injectors 10Reconnect the negative cable to the battery11Install
the upper side panels and seat (see Chapter 9)12Test the fuel pump by turning on the key and listening for the pump to activate