Spark Plugs

Content Source: 2021 800 Titan Adventure Owner’s Manual (9931270 R01) > Maintenance Chapter

IMPORTANT

The Owner's Manual for this vehicle contains warnings, instructions and other information you must read and fully understand before safely riding or performing maintenance on this vehicle.Always follow the warnings and instructions in Owner's Manual.

Click the CONTENTS link above for the Table Of Contents, or download a full PDF of the Owner Manual in the Owner Support area of Polaris.com

Spark Plugs

Spark Plug Recommendations

NOTICE

Using non-recommended spark plugs can result in serious engine damage. A spark plug with a heat range too high will always cause engine damage if the engine is operated in conditions more severe than intended for that plug. Always use the spark plugs recommended for your snowmobile.

A new engine can cause temporary spark plug fouling due to the preservative added during the assembly process. Avoid prolonged idle speeds, which cause plug fouling and carbonization.

Refer to the Specifications chapter for the specific spark plug to be used in your snowmobile.

Change the spark plugs at the intervals outlined in the Periodic Maintenance section.

Use recommended spark plugs with the proper gap. Refer to the specifications section for the specific spark plug to be used in your snowmobile.
Use only resistor-type spark plugs.

Torque spark plugs to specification.

TORQUE
Spark Plug 18-22 ft-lbs (24-30 N·m)

Always carry spare spark plugs.

Spark Plug Maintenance

Inspect / replace the spark plugs as outlined in the periodic maintenance table.

The spark plugs can be serviced by using the following procedure.

Remove the side panels and hood.
Using the torx tool end of the spark plug wrench, remove bolts retaining the load center .
Carefully rotate load center away from radiator.
Remove the spark plug leads.
Clean the plug area so no debris can fall into engine when plug is removed.
Using the spark plug wrench provided in the tool kit, remove plug(s) by rotating it counter clockwise.

Replace spark plug if the following is observed:

Electrode damage / insulator cracked
Electrode / insulator is fouled
Regular replacement interval found on maintenance table

When inspecting a spark plug, take note of the electrode and insulator color. A light brown/dark tan color indicates the engine is running properly. If the spark plug electrode/insulator is white, the engine may be running lean. Inspect the engine, throttle body boots, etc. for air leaks.

If the spark plug electrode/insulator is black, oily, or shows heavy soot, the engine may be running rich. Inspect the engine, fuel system, and lubrication system for problems.

Set the electrode gap to specification before installing a new spark plug.

MEASUREMENT
NGK® BPR9ES Gap: .027″ (0.70 mm)

When installing spark plug(s), install clean and dry. Torque to specification.

TORQUE
Spark Plug Torque: 18 - 22 ft-lbs (24 - 30 Nm)

Spark Plug Condition

Normal Plug

The normal insulator tip is gray, tan or light brown. There will be few combustion deposits. The electrodes are not burned or eroded. This indicates the proper type and heat range for the engine and the service.

TIP

The tip should not be white. A white insulator tip indicates overheating, caused by use of an improper spark plug or incorrect carburetor/throttle body adjustments.

Wet Fouled Plug

The wet fouled insulator tip is black. A damp oil film covers the firing end. There may be a carbon layer over the entire nose. Generally, the electrodes are not worn. General causes of fouling are excessive oil or use of non-recommended injection oil.