1. Product Overview
This manual provides essential information for the installation, maintenance, and understanding of NGK BKR7E Copper Spark Plugs. These spark plugs are designed to be a direct replacement for Polaris Ranger XP 700 models manufactured between 2005 and 2009, ensuring reliable ignition performance.
Image 1.1: A set of four NGK BKR7E copper spark plugs, ready for installation.
2. Product Features
- NGK Copper Spark Plug Box of 4 (BKR7E): This package includes four NGK BKR7E spark plugs, suitable for a complete engine replacement.
- Manufacturer Part Number: 4644: Identifies the specific NGK spark plug model.
- NGK V-Power Technology: Offers reliable performance and improved ignitability compared to standard nickel spark plugs.
- OE Equivalent Replacement: Designed to meet or exceed original equipment specifications for your vehicle.
3. Installation Guidelines
Proper installation is crucial for optimal spark plug performance and engine longevity. If you are unsure about any step, consult a qualified mechanic.
- Safety First: Ensure the engine is cool and the vehicle's ignition is off. Disconnect the battery's negative terminal to prevent accidental starting.
- Access Spark Plugs: Locate and carefully remove the spark plug wires or coil packs. Note the order for correct reinstallation.
- Remove Old Plugs: Use a spark plug socket to loosen and remove the old spark plugs. Inspect them for signs of wear or engine issues.
- Inspect New Plugs: Verify the new NGK BKR7E spark plugs are free from damage. The gap is pre-set to 0.035 inches (0.9mm) from the factory; avoid adjusting unless specified by your vehicle's service manual.
- Install New Plugs: Hand-thread the new spark plugs into the cylinder head to avoid cross-threading. Once finger-tight, use a torque wrench to tighten them to the specified torque values:
- Cast Iron Heads: 18-25.3 Lb. Ft.
- Aluminum Heads: 18-21.6 Lb. Ft.
- Reconnect Components: Reattach spark plug wires or coil packs in their correct order. Reconnect the battery's negative terminal.
Image 3.1: Detailed view of the spark plug threads and electrode, highlighting critical areas for installation.
4. Optimal Performance
NGK BKR7E spark plugs are designed to provide consistent and efficient ignition for your Polaris Ranger XP 700. Proper installation and regular maintenance contribute to:
- Improved engine starting.
- Stable idle and smooth acceleration.
- Optimized fuel efficiency.
- Reduced exhaust emissions.
5. Maintenance
Regular inspection and timely replacement of spark plugs are vital for maintaining engine health.
- Inspection: Periodically inspect spark plugs for signs of wear, fouling, or damage. A healthy spark plug should have a light tan or grayish-white deposit on the firing tip.
- Replacement Interval: Refer to your Polaris Ranger XP 700 owner's manual for recommended spark plug replacement intervals. Typically, copper spark plugs are replaced more frequently than iridium or platinum plugs.
- Gap Check: While NGK spark plugs are pre-gapped, it is good practice to verify the gap (0.035 inches or 0.9mm) before installation, especially if there is any concern about shipping damage. Use a wire-type feeler gauge for accuracy.
Image 5.1: Close-up of the spark plug's electrode, showing the gap and firing tip.
6. Troubleshooting Common Issues
If you experience engine performance issues, spark plugs can sometimes be a contributing factor. Here are common symptoms and potential causes:
- Engine Misfires or Rough Idle: Could indicate a faulty spark plug, incorrect gap, or issues with the ignition system (e.g., spark plug wire, coil pack).
- Hard Starting: Worn or fouled spark plugs can make it difficult for the engine to ignite the fuel-air mixture.
- Reduced Fuel Economy: Inefficient combustion due to old or improperly functioning spark plugs can lead to increased fuel consumption.
- Loss of Power: A weak spark can result in incomplete combustion, leading to a noticeable decrease in engine power.
If troubleshooting these basic spark plug-related issues does not resolve the problem, it is recommended to consult a professional mechanic for a comprehensive diagnosis.
7. Specifications
| Component | Specification |
|---|---|
| Shell | |
| Thread Diameter | 14mm |
| Thread Pitch | 1.25mm |
| Seat Type | Gasket |
| Reach | 19mm (3/4") |
| Hex Size | 5/8" (16mm) |
| Terminal Type | Solid |
| Overall Height | ISO |
| Gap | 0.035" (0.9mm) |
| Center Electrode | |
| Material | Nickel |
| Type | V-Cut |
| Size | 2.5mm |
| Projection | Projected |
| Ground Electrode | |
| Material | Nickel |
| Type | Standard |
| Quantity | 1 |
| General Specifications | |
| Resistor | Yes |
| Resistor Value | 5K Ohm |
| Heat Range | 7 |
| Manufacturer Part Number | 4644 |
Image 7.1: Close-up of the spark plug's ceramic insulator and terminal.
8. Important Safety Information
Always prioritize safety when working on your vehicle. Failure to follow safety precautions can result in injury or damage.
- Wear appropriate personal protective equipment, including safety glasses and gloves.
- Ensure the engine is cool before handling spark plugs. Hot engine components can cause severe burns.
- Disconnect the vehicle's battery before performing any electrical work.
- Keep spark plugs and tools away from children and pets.
Proposition 65 Warning
Image 8.1: California Proposition 65 Warning.
WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65warnings.ca.gov.
Legal Disclaimer
This product is an aftermarket component. It is not an Original Equipment Manufacturer (OEM) part and is neither manufactured nor sold by the vehicle manufacturer listed. We are not affiliated with the vehicle manufacturer.
9. Warranty and Support
For specific warranty information or technical support regarding your NGK BKR7E spark plugs, please refer to the documentation provided with your purchase or contact the seller directly. Keep your proof of purchase for any warranty claims.
