Carburetion Specifications; Carburetor Operation; Operation Overview - Polaris PREDATOR 50 2009 Manual

Carburetion Specifications

PREDATOR 50
Cutaway
Pilot Air Screw
Needle & Seat
Pilot Jet
Main Jet
E-clip Position
OUTLAW 90 / SPORTSMAN 90
Cutaway
Pilot Air Screw
Jet Needle
Pilot Jet
Main Jet
E-clip Position
n/a
2.5 turns out
1.2
12.5
62.5
#4 From Top
3.0
2.25 ± .5 turns out
89Q-3
40
82
#3 From Top

CARBURETOR OPERATION

Operation Overview

The engine of a vehicle is operated under a wide range of
conditions, from idling with the throttle valve remaining almost
closed, to full load or maximum output with the throttle valve
fully opened. In order to meet the requirements for the proper
mixture ratio under these varying conditions, a low speed fuel
system, or pilot system, and a main fuel system are provided in
these type of carburetors.
The function of a carburetor is to produce a combustible air/fuel
mixture by breaking fuel into tiny particles in the form of vapor,
to mix the fuel with air in a proper ratio, and to deliver the
mixture to the engine. A proper ratio means an ideal air/fuel
mixture which can burn without leaving an excess of fuel or air.
Whether the proper mixture ratio is maintained or not is the key
to efficient engine operation.
This carburetor has varying operations depending upon varying
driving conditions. It is constructed of a float system, pilot
system, main system, and starter system or initial starting
device.
Fuel Supply
Constant
Fuel Level
Float
General VM Carburetor Representation
FUEL SYSTEM
Slide Stop
Adjustment
Idle Mixture
Air Screw
Needle
Valve
Float Arm
4.3
4