2010 Polaris Sportsman 850 Service Manual, Page 59Get this manual

2010 Polaris Sportsman 850 Service Manual, Page 59

ELECTRONIC FUEL INJECTION ECU RemovalReplacement 12Remove the seat and upper left-hand side panel (see Chapter "Seat and
nonserviceable preliminary 60-micron filterFuel pump is not serviceable, picture for reference only Regulator Fuel Gauge
Sender Remove the (4) screws retaining the ECU to the airbox and remove the ECUPreliminary Filter 60-micron Fuel Pump When
the key switch is turned to "ON", the ECU activates the fuel pump, which pressurizes the system for start-upThe ECU switches
off the pump preventing the continued delivery of fuel in these instances: If the key switch is not promptly turned to the
"start" position If the engine fails to start If the engine is stopped with the key switch "ON" (as in the case of an accident)To
install, reverse the previous stepsDO NOT apply dielectric grease to the connector, as it is sealed connectorTighten screws