Ec38Pl Engines; Jetting Guidelines For Round-Port Pistons - Polaris Magnum 2x4 Service Manual

EC38PL Engines
Jetting Guidelines For Round-Port Pistons
ENGINE
Engine Specifications
Pistons for EC38PL engines shipped as service parts have round ports on the intake skirt. If you are replac-
ing an oblong port piston with the new round port style, follow the instructions included with the piston or refer
to this chart for quick reference. Without the jetting change the machine will run slightly rich on the main jet.
l
Piston Ports
J
Use on
l
Piston Ports
J
Use on
This piston was shipped with:
0 0
1994,
0 0
1995, &
Late 1996
200 Main Jet
Early 1996
to current
230 Main Jet
) Intake side (
400's
) Intake side (
6CEY6-3 Jet Needle.
A #35 Pilot Jet is not supplied with this piston kit, although a #35 is required if you install a round port piston in a 1995
Scrambler (EC38PLE-03 engine).
A round port piston along with the jetting changes shown effectively changes earlier model EC38PL engines to 1997 spec-
ifications for carburetion and engine operating characteristics. Jetting compensation for altitude and temperature will be
the same as 1997 EC38PLE-06 engines or EC38PLE-07 (Sport, Scrambler) engines.
**In all cases the 6CEY6·3 Jet Needle (included with piston) should be installed if you replace an "oblong port"
style piston with a "round port" style piston. Standard "E" clip position is #3.
Need to
Year Engine Type Model Original Original Need to Change Change
Main Main Jet? Pilot
Piston Type Jet Jet?
1994·" .•.... ····E938PL
7
01 ALL (E938s)
I.
"'''Oblong Pqrts 200 NO-Use Original NO
1995 EC38PLE·Q1
.
4QO 2x4,
Xplor~r
4x4,
"'Oblongports 200
NO-Use Original
NO
. '
Sportsman,
AOO
6x6
,
..
'
I 1995 .' ····EC38P\.;E·02
. . . . 'Sport
.
*"Obiong Ports . 200 NO-Use Original NO
.....
'
.
1995 EC38PLE-03
.'
Scrambler
/'
. . . .
*~Oblong
Ports
240
YES-Use 230 ·Main .Jet .. ' YES-Use
.
'
..
~35
. Pilot ....
.'
,,',
Jet
I. . .
'
.....
.. i
...
.
'
.' .
.
.'
..
,
.
1"Early
. '
EC38PLE-04 Xpress 400,
)(plor~r:400,
. . . . . . . **OblongPort!)
210
.
I . ".
YESi-Use20llMain Jet
NO
1996
Sportsman 4x4, 4006x6
.
"
..
'
........
•
...
.'
. .'
Late EC38PLE-04
Xpress 400, Xplorer 400,
Round Ports 200 NO-Use Original NO
1996
Sportsman 4x4, 400 6x6
Early .EC38PLE-.05
Sport 4x4,$crambler
..
'
**Oblong .ports 250
.....
YES-Use 230 Main Jet
.'
NO
. . 1996
".
"1·'
....
I·' ....
.
,.
.' .'
.
..
Late
EC38PLE-05 Sport 4x4, Scrambler Round Ports 230 NO-Use Original NO
1996
1997 EC38PLE-06
Xpress 400, Xplorer 400, Round Ports
200
NO-Use Original NO
Sportsman 4x4, 400 6x6
1997 EC38PLE-07 Sport 400, Scrambler 4x4 Round Ports 230 NO-Use Original NO
Polaris Industries Inc. 3.3a
5/98