Fuel Tank Vent System; Air Intake Box / Pre-Filters - Polaris IQ 2007 Service Manual

Fuel Tank Vent System

All models feature a fuel tank vent / vacuum check valve system.
There are two systems used depending on the model year of the
snowmobile.
On some models, the vent / vacuum check valve system
resembles the illustration below.
When inspecting the system, verify the hoses are not cut or
kinked.
VENT CHECK VALVE
(ARROW POINTS AWAY FROM TANK)
VACUUM CHECK VALVE
("VAC" FACES "Y" FITTING)
Some models feature a rollover check valve / vent / vacuum
check valve assembly bonded to the inside of the fuel tank. The
rollover check valve prevents fuel from escaping the tank in the
event of a vehicle rollover.
ROLLOVER VALVE
The rollover check valve is not serviceable. When inspecting the
system, verify the hose is not kinked.

Air Intake Box / Pre-Filters

Inspect the inside of the air intake box and pre-filters for foreign
material and/or damage.
ADAPTOR
BOOTS
PINS
NOTE: All 2007 and some 2008 CFI models were
manufactured with a two-piece airbox where an
adapter plate was secured to the throttle body. The
airbox then snapped into the adapter plate to make
the airbox assembly.
The two-piece air box is no longer available. A one-
piece air box is the direct replacement. The new air
box features adaptor boots that are pinned to the air
box. A set of gear clamps secure the boots to the
throttle body assembly.
Inspect the console-mounted pre-filters for damage, and foreign
material. Replace filter(s) or clean if required.
Maintenance
ONE-PIECE CFI AIR BOX
3
PRESS./TEMP. SENSOR
3.13