The correct spark plug helps a Can-Am Outlander 800 start reliably, idle smoothly, and deliver consistent power. Many Outlander 800 and 800R models use an NGK DCPR8E plug, but the exact specification can vary by model year and configuration. Checking the owner’s manual or the BRP parts information for the specific ATV is the safest way to confirm the part before buying. This guide covers common plug specifications, replacement steps, inspection clues, and troubleshooting tips.
Which Spark Plug Fits A Can-Am Outlander 800?
Many Can-Am Outlander 800 and 800R ATVs with Rotax V-twin engines use an NGK DCPR8E spark plug. This is a common fitment, not a guarantee for every year, trim, or market. Parts may also be listed under a BRP part number; use the number and specification shown in the manual or an official parts catalog to confirm compatibility.
Before ordering, identify the ATV’s model year and exact version. “Outlander 800” can refer to different model years and packages, and related models such as the Outlander 800R may have different catalog listings. A dealer or reputable parts supplier can check the vehicle identification number (VIN) against the correct parts information.
| Item | Common specification | What To Verify |
|---|---|---|
| Plug type | NGK DCPR8E is a common fitment | Exact year, model, and BRP catalog listing |
| Electrode gap | Often listed around 0.8 mm (0.031 in.) | Use the gap specified in the owner’s manual |
| Quantity | Two plugs on the V-twin engine | Confirm the engine configuration |
Important: The figures above are common reference points, not substitutes for the specification for a particular ATV. If the owner’s manual gives a different plug or gap, follow the manual. Do not select a plug based on thread appearance alone; reach, seat design, heat range, and terminal style also matter.
How To Confirm The Correct Plug
The owner’s manual is the primary reference for spark-plug type, gap, and service instructions. Check the maintenance or specifications section, using the manual that matches the ATV’s model year. If the manual is unavailable, consult BRP’s official parts information or an authorized Can-Am dealer. Provide the VIN and model designation so the listing can be matched accurately.
The marking on an old plug can help identify what was installed, but it does not prove that it is correct. A previous owner may have fitted a different plug, and a plug that physically screws into the head may still have the wrong reach or heat range. Compare the old plug with the specified part and investigate any mismatch before installing replacements.
When buying, check that the plug is genuine and undamaged. Counterfeit or incorrectly packaged plugs may not meet the stated specification. Avoid substituting a different heat range, electrode design, or brand-equivalent without a reliable application reference. Small differences can affect combustion, starting, and engine durability.
Why Spark-Plug Gap Matters
The gap is the distance between the center electrode and the ground electrode. The ignition system must create a spark across this gap to ignite the air-fuel mixture. If the gap is too wide, the plug may misfire under load or when the engine is cold. If it is too narrow, the spark may be weaker or combustion less consistent.
Use the gap in the manual for the specific model. If the specification is 0.8 mm, that is approximately 0.031 inch. Measure with a wire-style or round spark-plug gap gauge. A flat feeler gauge may not measure a rounded electrode as accurately.
Adjust only the ground electrode, using a proper tool and gentle pressure. Do not pry against or press on the center electrode or its ceramic insulator. Inspect a new plug before installation, since shipping or handling can alter the gap. If the electrode is bent, chipped, or visibly damaged, replace the plug rather than attempting a repair.
When To Replace The Spark Plugs
Follow the scheduled maintenance interval in the model-specific owner’s manual. The service schedule can differ by year and operating conditions. Frequent short trips, extended idling, dusty use, heavy loads, or repeated cold starts can make inspection more important. Severe use may justify more frequent checks, but it does not change the manufacturer’s specified replacement part.
Replacement may also be appropriate when the plugs are worn, damaged, contaminated, or outside the specified gap. Symptoms such as hard starting, rough idle, hesitation, or reduced power can be related to plugs, but they can also come from fuel, air, ignition, or mechanical problems. A new set is not a substitute for diagnosing a persistent fault.
The Outlander 800’s V-twin engine uses two spark plugs, one for each cylinder. For balanced service, inspect both and generally replace them as a pair when the service interval calls for replacement. Record the date and engine hours or mileage, if available, to make future maintenance easier.
How To Replace Can-Am Outlander 800 Spark Plugs
Work on a cool engine in a clean, well-ventilated area. Keep the ATV stable, set the parking brake, and switch the ignition off. Remove the key and disconnect the negative battery cable if the manual’s procedure calls for it. Keep dirt, water, and loose debris away from the open spark-plug wells.
- Access the plugs. Remove only the body panels or components needed to reach the ignition coils and plug wells. The access procedure can differ by year and trim, so follow the service information for the ATV.
- Clean the area. Brush or blow away debris around each plug before removal. Do not allow dirt to fall into a cylinder when the plug is out.
- Remove the coil connection. Release the electrical connector carefully, then remove the coil or plug cap as directed. Do not pull on the wires; a damaged connector or boot can cause ignition problems.
- Loosen the plug. Use the correctly sized spark-plug socket and an extension. Turn the plug counterclockwise. If it resists or feels cross-threaded, stop rather than forcing it.
- Inspect and compare. Check the removed plugs for wear, deposits, damage, and differences between cylinders. Compare the replacement part with the specified type and verify its gap.
- Install by hand first. Carefully start each plug by hand to reduce the risk of cross-threading. Once the plug is seated, tighten it to the torque specified in the service manual.
- Reconnect and reassemble. Refit the coils or caps and connectors securely, then reinstall any removed panels. Start the engine and check for a steady idle and warning lights.
Do not guess at tightening torque. Too little can allow poor seating or heat transfer, while too much can damage cylinder-head threads. Torque values can depend on the plug, engine, and installation conditions. Use the manual or a service reference for the exact model.
Reading Spark-Plug Condition
A plug can offer clues about combustion, but its appearance is not a complete diagnosis. Readings are most useful when the plug has been used under known conditions and compared with the service manual’s guidance. A plug that has idled for a long time may look different from one removed after sustained operation.
| Appearance | Possible Meaning | Recommended Check |
|---|---|---|
| Light tan or gray deposits | Often consistent with ordinary operation | Confirm gap and service interval |
| Dry, black soot | May indicate a rich mixture, restricted air filter, or repeated cold running | Inspect the air filter and fuel or intake system |
| Wet with fuel | May result from flooding or failure to ignite | Check starting procedure, ignition, and fuel system |
| Oily deposits | May point to oil entering the combustion chamber | Seek diagnosis if deposits recur |
| Cracked ceramic or damaged electrodes | Physical damage or incorrect handling | Replace the plug and check for underlying causes |
A melted electrode, blistered insulator, or unusually pale plug can indicate overheating or another serious condition. Stop using the ATV if the engine runs poorly or the plug shows severe damage. Continued operation may worsen engine problems. A qualified technician can check fuel delivery, cooling, ignition timing, compression, and other possible causes.
Common Spark-Plug Problems And Checks
Hard Starting Or No Start
First confirm that the plug is the correct type, properly connected, and not cracked or fouled. Check that the battery is adequately charged and that the ignition and fuel systems are operating as intended. A plug that looks serviceable does not guarantee a strong spark, and repeated cranking can flood the engine. Follow the manual’s starting and troubleshooting procedure.
Rough Idle Or Misfire
Inspect both plugs and their boots, coils, and connectors. A loose connection, damaged coil, incorrect gap, or contaminated plug may contribute to a misfire. If replacing plugs does not resolve the symptom, avoid repeatedly changing parts. A diagnostic check can distinguish an ignition issue from fuel delivery, air leaks, sensor faults, or mechanical concerns.
Repeated Fouling
New plugs that foul quickly point to a problem beyond routine wear. Check air-filter condition and confirm that the engine is reaching normal operating temperature. Fuel-system problems, excessive idling, oil consumption, or weak ignition may also contribute. The correct cause depends on the plug’s appearance and the ATV’s operating symptoms.
Maintenance Tips For Longer Plug Life
- Use the plug type and gap listed for the exact model year.
- Keep the air filter clean and service it according to the owner’s manual, especially after dusty rides.
- Make sure plug wells, coil boots, and electrical connectors are clean and dry before reassembly.
- Use a torque wrench and the manufacturer’s tightening specification.
- Inspect both plugs when diagnosing an engine problem, and compare their condition.
- Do not apply anti-seize or dielectric grease to the threads or electrodes unless the service instructions specifically call for it.
- Keep a record of plug changes and other maintenance to spot recurring problems.
Frequently Asked Questions
Does Every Can-Am Outlander 800 Use An NGK DCPR8E?
No single listing should be assumed to cover every Outlander 800 year and version. NGK DCPR8E is a common fitment, but the owner’s manual or a VIN-matched BRP parts listing should determine the correct plug for an individual ATV.
What Is The Can-Am Outlander 800 Spark-Plug Gap?
A gap near 0.8 mm (0.031 inch) is commonly associated with this application. Verify the exact value in the manual for the model year before installation, and check each plug with a suitable gauge.
How Many Spark Plugs Does An Outlander 800 Have?
The Rotax V-twin engine uses two plugs, one per cylinder. Inspect both during service, and follow the maintenance schedule for replacement.
Can A Spark Plug Cause Poor Performance?
Yes. A worn, fouled, incorrectly gapped, or damaged plug can contribute to difficult starting, misfires, rough idle, hesitation, and reduced power. Those symptoms can also have other causes, so persistent problems need diagnosis beyond plug replacement.
Should Spark-Plug Threads Be Oiled?
Do not oil the threads unless the manufacturer specifically instructs it. Lubrication changes the relationship between tightening torque and clamping force, which can lead to overtightening. Follow the plug and ATV service instructions for thread preparation and torque.
Reliable Fitment Starts With The Model Year
For many Can-Am Outlander 800 ATVs, the NGK DCPR8E is a useful starting point for parts research, and a gap around 0.8 mm is commonly cited. The exact specification must still be checked against the correct manual or BRP parts listing. Confirm the plug before purchase, install it on a cool engine, protect the cylinder from debris, and use the specified tightening torque. If plugs foul repeatedly or engine symptoms remain, investigate the underlying cause rather than treating the spark plug as the only possible fault.