Xpress 300 W98Ca28C (Engine -Ec-28Pfe-12) - Specifications And Clutching And Jetting Guidelines For Altitude And Temperature - Polaris Magnum 2x4 Service Manual

FUEL SYSTEM/CARBURETION
1998 Specifications
XPRESS 300
W98CA28C
(Engine - EC-28PFE-02)
SPECIFICATIONS AND CLUTCHING AND JETTING GUIDELINES
FOR ALTITUDE AND TEMPERATURE
Carburetor VM30SS
Main Jet - 155 Pilot Jet - 40
Float Level - Float arm parallel with bowl gasket surface (Page 4.22)
Cut Away - 2 Nickel/Aluminum Air Screw - 1.5 Turn CCW from Seat*
Jet Needle - 5DP7-3 Needle Jet - 0-4 (169)
Needle Seat - 2.5
Flywheel Marking: FF4574 CDI Marking: CU2513 Alternator Output: 150 Watts
Ignition Timing: 25° BTDC
@
3000 RPM (± 2°) Spark Plug: BR8ES
Gap: .028 (.7mm)
Operating RPM: 5600 (± 200) Idle RPM: 600 (± 100)
*Turn in (clockwise) one quarter turn for each 30 degrees below 60 degrees F.
Turn out (counterclockwise) one quarter turn for each 30 degrees above 60 degrees
F.
Observe the following altitude recommendations and set up the vehicle accordingly.
Altitude
Meters
(Feet)
AMBIENT
TEMPERATURE
0-900
(0-3000)
900-1800
(3000-6000)
1800-2700
(6000-9000)
2700-3700
(9000-12000)
Below OaF
(Below -18°C)
180
0° to 40°F
(-18°C to +5°C)
170
+40° to +80°F +80°F & Above
(+5°C to +26°C) (+26°C & Above)
155 145
I.·.,.::.' : .·.· . . · . . . ,.·.· •. • . . ' . ·.·.' .
'1-
Shaded Zone should drop Jet Needle one position (raise E-Clip)
.. - Turn Air Screw in
1/2
to
3/4
Turn
Clutching
Altitude Shift Clutch Driven
Weight
Spring Helix
Meters 0-900 G Blue/Green
2-2
(Feet)
(0-3000) 48GR
900-1800 G Blue/Green
2-2 or
(3000-6000) 48GR 2-1
1800-2700
F
Blue/Green 2-2
(6000-9000) 45GR
2700-3700 F Blue/Green
2-1
(9000-12000) 45GR
5/98
4.4f
Polaris Industries Inc.