9850060 R02 - 2020-2021 850 AXYS™ Long Track Snowmobile Service Manual
© Copyright Polaris Inc.
5.15
FUEL INJECTORS
These snowmobile engines feature a dual fuel injector /
wiring harness assembly. Fuel injector replacement
requires removing both fuel injectors / harness and
installing a new assembly. Fuel injectors are not supplied
individually. Harness cutting and splicing is not required.
To obtain the correct fuel injector set for the vehicle,
always reference the model-specific parts manual when
ordering a new fuel injector set. Note that fuel injector
color code may not match the fuel injector set originally
installed on the engine.
IMPORTANT
Always verify the fuel injector color code with the fuel
calibration map loaded on the ECU. Severe engine
damage may occur if the incorrect fuel injector
calibration is loaded on the ECU.
The MAG and PTO fuel injectors are noted with labels
q
. Install the fuel injectors in their correct locations.
RED, BLUE, or YELLOW color bands
w
are located at
the base of each fuel injector. When replacing fuel
injectors, reference this color band to ensure the right
fuel map is selected using Digital Wrench.
PINS
WIRE
COLOR
INJECTOR
RESIST-
ANCE
VALUE
1
YE/WH
PTO
12 Ω
2
RD/DB
3
DB/WH
MAG
12 Ω
4
RD/DB
FUEL RAIL / FUEL INJECTOR SERVICE
IMPORTANT
Use Digital Wrench to reset the fuel injector break-in
timer when new fuel injectors are installed on the
engine, see Fuel Injector Break-In Timer Reset page
WARNING
Gasoline is extremely flammable and explosive under
certain conditions. Do not smoke or allow open flames
or sparks in or near the fuel tank / fuel system.
NOTICE
The fuel rail, micro-dampers, and fuel hoses attached to
the rail are not serviceable.
IMPORTANT
Do not touch fuel injector inlets / outlets. Leave
protective caps in place while handling.
NOTICE
Fuel rail fasteners must be replaced each time they are
removed or loosened.
1. Follow the procedure for throttle body removal, but
the throttle body can remain installed in the adapter
plate.
2. Disconnect the fuel return
q
and supply
w
quick-
disconnect fittings. Wipe away any spilled fuel using a
clean shop towel.
IMPORTANT
Do not apply excessive pressure to fuel fittings or clips.
Summary of Contents for 850 PRO-RMK 155 2.6" QD 2021
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