5
9850064 R03 - 2021 650 / 850 Matryx Trail Performance / Crossover Snowmobile Service Manual
© Copyright Polaris Inc.
5.23
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 INJECTOR SERVICE
NOTICE
Anytime a fuel injector is removed the o-rings from the
top and bottom of the injector(s) must be replaced.
Always discard old o-rings.
1. Lubricate NEW injector o-rings with clean, silicone
free motor oil.
NOTICE
Apply oil sparingly and avoid contaminating the pintle
valve / jet surface and upper inlet port.
2. Install replacement o-rings onto top and bottom of
injectors.
ITEM
PART
NUMBER
POSITION
q
1500198
Top of Injector
w
5412891
Bottom of
Injector
e
5436287
—
FUEL SYSTEM
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