Sportsman 500 W98Ch50A (W90Ch50Ab) (Engine - Eh-50Ple-07) - Specifications And Clutching And Jetting Guidelines For Altitude And Temperature - Polaris Magnum 2x4 Service Manual

FUEL SYSTEM/CARBURETION
1998 Specifications
SPORTSMAN 500
W98CH50A (W90CH50AB)
(Engine - EH-50PLE-07)
SPECIFICATIONS AND CLUTCHING AND JETTING GUIDELINES
FOR ALTITUDE AND TEMPERATURE
Carburetor BST34 (CV)
Main Jet - 142.5 Pilot Jet - 42.5 Pilot Screw* 2.0 Turns out from lightly seated
Jet Needle - 5D78-3 Needle Jet - P-1 Float Level 13.0mm (Page 4.37)
Needle Seat - 1.5 Pilot Air Jet - 160 Throttle Valve - #100
Flywheel Marking: FF97 COl Marking: CU2557 Alternator Output: 250 Watts
Ignition Timing: 30° BTDC
@
3500 RPM (± 1.5°) Spark Plug: BKR5ES Gap: .028 (.7mm)
Operating RPM: 6000 (± 200) Idle RPM: 1200 (± 100)
*Turn out (counterclockwise) one quarter turn for each 30 degrees below 60 degrees F.
Observe the following altitude recommendations and set up the vehicle accordingly.
Altitude AMBIENT Below O°F 0° to 40°F +40° to +80°F
TEMPERATURE
(Below -18°C) (-18°C to +5°C) (+5°C to +26°C)
Meters 0-900 152.5 147.5 142.5
(Feet) (0-3000)
900-1800 147.5 142.5 137.5
(3000-6000)
+80°F
&
Above
(+26°C
&
Above)
137.5
130
1800-2700 140
135 130
. . • \ . .
·1~5
......
/
(6000-9000)
..
. . ... . . . . . ·.i.· .....
<
.
2700-3700
135
130
.......
125·· ........
•
120 . . · • · • · · ·
(9000-12000)
I:
"
.
...
•
••
L-....;.._....JI -
Pilot screw in 1/2 turn
Clutching
Altitude Shift Clutch Driven
Weight Spring Helix
Meters
0-900 10 MH Blue/Green 2-2
(Feet) (0-3000)
900-1800 10 BH Blue/Green 2-2
(3000-6000 )
1800-2700
10WH Blue/Green
2-1
(6000-9000)
2700-3700 10 RH Blue/Green 2-1
(9000-12000)
Models Equipped With EBS Require No Helix Adjustment
5/98
4.4n
Polaris Industries Inc.