Snowmobile Polaris Two Stroke (2007 year). Instruction - part 24

 

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Snowmobile Polaris Two Stroke (2007 year). Instruction - part 24

 

 

4.13

FUEL DELIVERY

4

9.

Inspect e-rings, plate, spring, and rings (14) connecting the
slide to the lever if needed.

10. Remove water trap/drain plug (15) and single screw (16) on

the bottom of the carburetor.

11. Remove and drain the float bowl (17).

NOTE:  Float bowl will not come off unless the water
trap/drain plug and screw are removed.

12. Remove the two screws (18) holding the float/needle and

seat assembly (19) in position and remove this assembly.

13. Inspect the contents for wear and debris.

14. Remove and inspect the main jet (20), pilot jet (21), and

starter jet (22). Clean them out.

15. Remove the air jet screw if so equipped.

16. Clean out all passages in carburetor body with carburetor

cleaner. Dry all passages and jets with compressed air.

17. Replace gaskets and any parts that show wear or damage.

18. Repeat steps 1-18 for disassembly for the other carburetor

if needed.

14

15

16

17

18

19

20

22

21

4.14

FUEL DELIVERY

Assembly

1.

Install the main jet (20), pilot jet (21), and starter jet (22).

2.

Install float/needle & seat assembly (19).

3.

Place carburetor in an inverted position.

4.

Connect a pressure tester (PN 2870975) to fuel inlet fitting.
Apply 5 psi pressure and observe for one minute. The
needle and seat should hold pressure indefinitely. If the
pressure drops, carefully inspect the needle and the needle
seat. The needle can be replaced (needle comes with float
and seat).

5.

Carefully inspect float bowl gasket and replace if
necessary.

6.

Install float bowl (16) on carburetor with water trap/drain
plug (15) and single screw (16) on the bottom of the
carburetor.

7.

If throttle slide was removed, install throttle slide (11) so
that the wider face is facing the engine side of the
carburetor.

8.

Install the funnel gasket (13) and funnel (12) onto the
carburetor. You will have to lift the throttle slide up and
place the smaller face into the funnel area.

9.

Install funnel screws (10).

10. Install the e-clip (8) in the desired position on the jet needle

(7).

11. Slide the plastic washer (9) on the jet needle so that it is

positioned to rest on top of the throttle valve when
assembled.

12. Install carburetors on engine.

13. Synchronize the carburetors. See “Throttle Valve

Synchronization” in this chapter.

14. Replace top cap gaskets (3), cover (2) and screws (1).

15. Check throttle lever free play. See “THROTTLE LEVER

FREE PLAY” on page 3.24.

CARBURETOR SYNCRONIZATION

Throttle Valve Synchronization

Mikuni TM style carburetors are synchronized at wide open
throttle without the engine running. The MAG side carburetor
is the adjusting carburetor, the PTO side carburetor has a non
adjustable set screw on the throttle shaft. The PTO carburetor is
considered the base carburetor. All adjustments are made to the
MAG carburetor

1.

Remove the air box.

2.

Remove the carburetor tops.

3.

Hold the throttle wide open with the bell crank on the
carburetor.

4.

The bottom of the throttle valve should be flush with the
top of the carburetor intake area.

5.

If they are not flush, hold the PTO carburetor flush with the
top of the intake area of the carburetor. 

6.

Turn the throttle slide synchronization screw until both of
the throttle slides are flush with the top of the intake area
of the carburetor.

7.

Once the PTO carburetor slide is flush, loosen the Phillips
head screw, located under the top cover on the MAG
carburetor.

Throttle slide sync screw

4.15

FUEL DELIVERY

4

8.

While holding the PTO carburetor slide flush to the top of
the carburetor, rotate the synchronization nut clockwise to
raise the slide and counterclockwise to lower the slide.

9.

Adjust the synchronization nut until it is even with the PTO
slide.

10. Once this is flush, lock the locking screw.

11. Replace the tops of the carburetor.

12. Install carburetor back onto the sled.

13. Install all cables. 

14. Install all vent lines, and fuel lines.

15. Check throttle free play.see “THROTTLE LEVER FREE

PLAY” on page 3.24.

CARBURETOR COMPONENT PART 
NUMBERS

Mikuni Pilot Jets

Mikuni Main Jets

Mikuni Jet Needles

PILOT JET NUMBER

PART NUMBER

25

3130064

30

3130065

35

3130066

40

3130067

45

3130068

50

3130629

55

3130070

60

3130071

Lock Screw

Sync Nut

M

A

IN J

E

T

P

A

R

T

 NUMBER

M

A

IN J

E

T

P

A

R

T

 NUMBER

M

A

IN J

E

T

P

A

R

T

 NUMBER

M

A

IN J

E

T

P

A

R

T

 NUMBER

95

3130102

175

3130118

310

3130134

470

3130147

100

3130103

180

3130119

320

3130135

490

3130148

105

3130104

185

3130120

330

3130136

500

3130149

110

3130105

190

3130121

340

3130137

510 N

3131400

115

3130106

195

3130122

350

3130138

520 N

3131401

120

3130107

200

3130123

360

3130139

530 N

3131402

125

3130108

210

3130124

370

3130290

540 N

3131408

130

3130109

220

3130125

380

3130140

550 N

3131409

135

3130110

230

3130126

390

3130480

560 N

3131410

140

3130111

240

3130127

400

3130141

145

3130112

250

3130637

410

3130599

150

3130113

260

3130129

420

3130142

155

3130114

270

3130130

430

3130143

160

3130115

280

3130131

440

3130144

165

3130116

290

3130132

450

3130145

170

3130117

300

3130133

460

3130146

JET NEEDLE

PART NUMBER

J8-9FH04-57

3130794

J8-9EH01-57

3130795

J8-9DH01-54

3130796

J8-8BEY01

3131250

J8-9DFH06-57

3131253

J8-9EFH01-60

3131207

J8-9DFH07-60

3131268

J8-9DFH10-57

3131313

J8-9DGI01-60

3131377

J8-9DGJ02-57

3131378

J8-9EFY02-61

3131202

4.16

FUEL DELIVERY

Mikuni Starter Jets

Mikuni (Short) Pilot Air Jets

Mikuni (Long) Pilot Air Jets

Mikuni Piston Valves

Mikuni (Notched) Piston Valves

STARTER JET

PART NUMBER

130

3130805

135

3130767

140

3130768

145

3130769

150

3130770

155

3130771

160

3130772

AIR JET

PART NUMBER

0.5

3130773

0.6

3130774

0.7

3130775

0.8

3130776

0.9

3130777

1.0

3130778

1.1

3130799

1.2

3130780

1.3

3130781

1.4

3130782

1.5

3130783

1.6

3130784

1.7

3130785

1.8

3130786

1.9

3130787

2.0

3130788

AIR JET

PART NUMBER

0.5

3131255

0.6

3131249

0.7

3131256

0.8

3131254

0.9

3131203

1.0

3131257

1.1

3131258

1.2

3131259

1.3

3131260

1.4

3131261

1.5

3131262

1.6

3131263

1.7

3131264

1.8

3131265

1.9

3131266

2.0

3131267

PISTON VALVE

PART NUMBER

1.5

3130940

2.0

3131252

2.5

3130790

3.0

3130791

3.5

3130792

4.0

3130793

PISTON VALVE

PART NUMBER

1.5

3131216

2.0

3131206

2.5

3131217

3.0

3131218

3.5

3131219

4.0

3131220

 

 

 

 

 

 

 

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