J
jgrantAug 19, 2025
What to do if my Polaris 850 MATRYX INDY VR1 129 2021 Snowmobiles spark plugs are damaged?
- GGregory GordonAug 19, 2025
If you find that the spark plugs are either fouled or damaged, you should replace them.
To Next PageTo Next PageWhat to do if my Polaris 850 MATRYX INDY VR1 129 2021 Snowmobiles spark plugs are damaged?
If you find that the spark plugs are either fouled or damaged, you should replace them.
Why Polaris Snowmobiles won't start because of ignition switch?
Make sure the key is in the ON / RUN position. You can also test the switch using continuity test tables in the Electrical Chapter.
Why Polaris 850 MATRYX INDY VR1 129 2021 Snowmobiles won't start because of auxiliary shut off switch?
Check that the auxiliary shut off switch is pulled up. You can also test the switch using continuity test tables in the Electrical Chapter.
How to test spark plug function on Polaris Snowmobiles?
Use a commercially available spark plug tester set at the specified electrode gap.
How to inspect stator on Polaris Snowmobiles?
Test the stator coil resistance, referencing the Electrical Chapter for resistance specifications. Also, inspect the 2 and 5 tooth position sensors.
What type of spark plug do I need for Polaris Snowmobiles?
Verify the specified spark plugs are installed and gapped to specification. Use NGK BPR9ES spark plugs with a gap of .27 in (.70 mm).
How to check fuel quality in Polaris 850 MATRYX INDY VR1 129 2021?
To check the fuel quality in your snowmobile, inspect the fuel in the fuel tank. Use a commercially available fuel tester to verify the ethanol content is 10% or less.
What to do if Polaris 850 MATRYX INDY VR1 129 2021 Snowmobiles fuel pump is not getting power?
To troubleshoot fuel pump power issues: 1. Connect a fully-charged 12V battery to the fuel pump prime connector. The fuel pump should turn on. 2. Connect Digital Wrench to the vehicle. 3. Use Output state control to test the fuel pump function. The ECU must command the fuel pump to turn on when using Output State Control testing.
What to do if my Polaris Snowmobiles is low on fuel?
Refill the fuel tank with fresh fuel. Note that the fuel pump may require priming or the fuel system may need to be purged of air if the snowmobile has run out of fuel.
How to check cylinder compression on Polaris 850 MATRYX INDY VR1 129 2021 Snowmobiles?
Test both cylinders under the same conditions using the same compression tester. Ensure the compression difference between the cylinders is 15% or less.
General| Engine | 850 Patriot |
|---|---|
| Engine Type | 2-stroke |
| Displacement | 840 cc |
| Horsepower | 165 hp |
| Cylinders | 2 |
| Brake Type | Hydraulic disc |
| Fuel System | Electronic Fuel Injection |
| Fuel Capacity | 11.5 US gal (43.5 L) |
| Track Length | 129 in (327.7 cm) |
| Track Width | 15 in (38.1 cm) |
| Cooling System | Liquid |
| Bore x Stroke | 85 mm x 75 mm |
| Oil Capacity | 3.5 US qt (3.3 L) |
Details on model number, VIN, engine serial number, and locations.
Guidelines for efficient and safe service work, including notes on torque and cleanliness.
Covers diagnostic trouble codes, troubleshooting guides, and Digital Wrench software overview.
Schedules required maintenance and inspections based on vehicle miles.
Lists recommended lubricants, service products, and their part numbers.
Information on mounting, flow offset identification, line connections, and priming procedures.
Procedures for engine removal and installation, including component views.
Engine model number matrix and detailed specifications for 650 and 850 engines.
Overview, operation, disassembly, installation, and diagnostic codes for E-VES system.
Details engine temperature and detonation protection modes and troubleshooting.
Overview of CFI system components and their functions.
Pinouts, label information, location, and service procedures for the ECU.
Overview, testing procedures, and wire routing for the TPS.
Overview, operation, and troubleshooting notes for the PERC system.
Step-by-step instructions for priming the fuel pump using Digital Wrench or manually.
Assembly views and procedures for fuel rail, injectors, and throttle body service.
General notes, assembly views, and inspection procedures for the brake system.
Information on drive clutch identification, assembly, removal, and disassembly.
Information on driven clutch assembly view, removal, disassembly, and installation.
Service procedures for front and rear track shocks on PRO-CC models.
Service procedures for front and rear track shocks on IGX 146 models.
Important safety warnings related to electrical system servicing and battery handling.
Details DTCs related to left hand controls, their causes, and troubleshooting steps.
Battery specifications, removal, and installation procedures.
Overview, location, details, circuit diagram, and testing for the PBR.
Lists diagnostic trouble codes for the PBR, their causes, and recommended actions.
Procedure for updating or replacing the PBR unit using Digital Wrench.
