4
4-17
The fuel system and the ignition system remain two sepa-
rate systems. In a no-start situation, first determine if the
problem is caused by lack of spark or by a fuel delivery
problem or by an internal engine condition (low cylinder
compression for example).
Once the problem area has been determined, check the
components involved using the Fluke Model 77 Multime-
ter or the EFI Analyzer depending on the test being made.
Fuel Pressure Regulator
1. Using the Fuel Pressure Test Kit, connect the tester
to the regulator fuel inlet.
NOTE: A short piece of 3/8 in. I.D. hose will be
needed to make the above connections.
2. Pressurize the regulator to 28-31.3 psi. Turn the pres-
sure tester shut off valve to the OFF position.
Observe the gauge for several minutes and note any
loss of pressure. If pressure begins to drop, the cause
may be a ruptured diaphragm, worn spring, or leak-
ing valve. If the regulator fails to build or maintain
pressure, replace the regulator.
NOTE: If the pressure drops, check the hose con-
nections to ensure no leaks exist.
Throttle Body Assembly
REMOVING (500/800 cc)
NOTE: The expansion chamber, shock mount
bracket support (800 cc), and air silencer must be
removed for this procedure (see Section 3).
1. Disconnect the wiring harness from each injector and
from the throttle position sensor.
2. Remove the coolant hoses from the throttle body
assembly and plug them to prevent leakage.
3. Remove the fuel supply hose from the fuel rail.
4. Loosen the flange clamps.
5. Remove the oil pump control rod (800 cc).
6. Slide the throttle body assembly out of the flanges;
then loosen the jam nut securing the throttle cable
and remove.
7. Remove the throttle body assembly.
INSTALLING (500/800 cc)
1. Attach the throttle cable to the throttle body; then
secure with jam nut. Secure the coolant hoses to
throttle body assembly.
2. Place the throttle body assembly into position. Make
sure the flanges and boots are positioned properly.
Secure with flange clamps.
3. Where applicable, connect the oil pump control rod.
4. Connect the fuel supply hose to the fuel rail.
729-325A
5. Connect the wiring harness to each injector and
throttle position sensor.
NOTE: Install the air silencer, shock mount bracket
support (800 cc), and the expansion chamber (see
Section 3).
6. Place the rear of the snowmobile on a shielded safety
stand and start the engine without touching the throt-
tle. It may idle slowly and stop. Restart using the
same procedure until the engine starts and builds
RPM on its own.
7. Check the cooling system and adjust the throttle
cable as necessary.
REMOVING/DISASSEMBLING
(1100 cc Non-Turbo)
NOTE: To remove the throttle body assembly, it is
necessary to remove the air silencer (see Section 3).
On the F/M/XF, the seat and gas tank must also be
removed.
1. Remove the coolant hoses and MAP sensor hoses
from the throttle body.
WARNING
Since the fuel supply hose may be under pressure, remove
it slowly to release the pressure. Place an absorbent
towel around the connection to absorb gasoline; then
remove the hose slowly to release the pressure. Always
wear safety glasses when removing the fuel hoses.
CAUTION
Verify the oil pump rod linkage is properly installed or
damage to the engine will occur.
CAUTION
When installing the throttle bodies, make sure the
gasline hose is properly routed to avoid premature
wear and/or contact with exhaust components.
Содержание Sno Pro 120
Страница 20: ...1 18 NOTES ...
Страница 29: ...2 9 2 570ENG12 ...
Страница 39: ...2 19 2 500CC2A_12 ...
Страница 45: ...2 25 2 NOTES ...
Страница 47: ...2 27 2 800_12_2 ...
Страница 61: ...2 41 2 Engine Torque Patterns 1100 cc 1100TorquePattern12 ...
Страница 63: ...2 43 2 1100ccZ1RV10 ...
Страница 81: ...2 61 2 1100ccZ1RV10 ...
Страница 82: ...2 62 Engine Torque Patterns 1100 cc 1100TorquePattern12 ...
Страница 141: ...2 121 2 SNO2152 ...
Страница 142: ...2 122 SNO2153 ...
Страница 180: ...3 18 0742 314 0746 520 F5 LXR 800 cc ...
Страница 204: ...3 42 NOTES ...
Страница 260: ...5 26 Troubleshooting Servomotor SERVO1A12 ...
Страница 261: ...5 5 27 SERVO2rv ...
Страница 264: ...Magneto 0746 255 1 ...
Страница 265: ...Main Harness p n 1686 600 F570 p n 1686 601 Bearcat 570 T570 p n 1686 612 Bearcat 570 XT 0746 237 2 ...
Страница 266: ...Main Harness p n 1686 603 F5 LXR 0746 249 3 ...
Страница 269: ...Main Harness p n 1686 588 F 800 M 800 XF 800 0746 242 6 ...
Страница 270: ...Main Harness p n 1686 611 TZ1 Turbo LXR LTD 0746 253 7 ...
Страница 271: ...Main Harness p n 1686 610 TZ1 TZ1 LXR 0746 252 8 ...
Страница 272: ...Main Harness p n 1686 613 Bearcat Z1 XT GS p n 1686 615 Bearcat Z1 XT LTD 0746 511 9 ...
Страница 273: ...Main Harness p n 1686 578 Sno Pro 120 10 0744 204 ...
Страница 274: ...Ignition Main Harness p n 1686 628 Sno Pro 500 11 0745 605 ...
Страница 275: ...Ignition Main Harness p n 1686 657 Sno Pro 600 12 0746 250 ...
Страница 276: ...0745 601 13 Console Harness p n 1686 631 TZ1 LXR TZ1 Turbo LXR LTD ...
Страница 277: ...Hood Harness p n 1686 638 F 800 M 800 XF 800 0746 243 14 ...
Страница 278: ...Console Harness p n 1686 633 Bearcat 570 F570 T570 0746 238 15 ...
Страница 279: ...Console Harness p n 1686 634 F5 LXR 0746 240 16 ...
Страница 280: ...Hood Harness p n 1686 639 F 1100 Turbo M 1100 Turbo HCR XF 1100 Turbo 0746 246 17 ...
Страница 281: ...Hood Harness p n 1686 658 Sno Pro 600 Cross Country p n 1686 664 Sno Pro 600 Sno Cross 18 0746 251 ...
Страница 282: ...0746 254 19 Console Harness p n 1686 547 Bearcat Z1 XT GS p n 1686 549 Bearcat Z1 XT LTD TZ1 ...
Страница 283: ...Hood Harness p n 1686 587 Sno Pro 500 20 0744 201 ...
Страница 284: ...Handlebar Harness p n 1686 652 TZ1 LXR Turbo LXR LTD p n 1686 653 Bearcat Z1 XT GS LTD 0746 513 21 ...
Страница 285: ...Passenger Seat Harness p n 1686 570 22 0744 197 ...
Страница 286: ...Handlebar Harness p n 1686 636 F 800 M 800 XF 800 p n 1686 654 M 800 HCR 0746 244 23 ...
Страница 287: ...Handlebar Harness p n 1686 537 Bearcat 570 F570 T570 0746 239 24 ...
Страница 288: ...Handlebar Harness p n 1686 574 F5 LXR 0744 189 25 ...
Страница 289: ...Handlebar Harness p n 1686 637 F 1100 Turbo M 1100 Turbo XF 1100 Turbo 0746 247 26 ...
Страница 290: ...Handlebar Harness p n 1686 590 Sno Pro 500 27 0744 200 ...
Страница 291: ...Handlebar Harness p n 1686 656 M 1100 Turbo Sno Pro HCR 28 0746 510 ...
Страница 292: ...Misc Groomer Special p n 1686 645 p n 1686 646 p n 1686 647 p n 1686 648 29 0746 241 ...
Страница 460: ...8 26 0744 930 ...