Bosch 7997 Spark Plug

Overview of Bosch Nickel Spark Plug 7997

The Bosch Nickel Spark Plug 7997 is engineered for reliable ignition performance in 4-cycle engines. Designed with a tapered v-profile ground electrode tip and a durable nickel-yttrium center electrode, this spark plug supports consistent combustion and efficient engine operation.

• Resistance: 6000 ohms for noise suppression
• Ground Electrode Tip Design: Tapered v-profile for precise spark delivery
• Center Electrode Core Material: Nickel-yttrium and copper for durability
• Pre-Gap Size: 0.8 mm for optimal spark gap
• Thread Diameter: 14 mm with 12.7 mm reach
• Heat Range: Manufacturer specified as 7
• Seat Type: Flat for secure fitment
• Insulator Material: Ceramic with non-projected design
• Hex Size: 20.8 mm for installation with standard tools
• Resistor: Yes, to reduce electromagnetic interference

Detailed Product Description

The Bosch Nickel Spark Plug 7997 belongs to the Nickel product line, known for its balance of performance and durability in secondary ignition components. The spark plug features a single ground electrode with a tapered v-profile tip, which enhances spark efficiency and combustion stability. The center electrode combines nickel-yttrium and copper materials, providing reliable conductivity and resistance to wear. Its ceramic insulator is non-projected, helping to maintain consistent ignition timing and reduce fouling. With a heat range of 7, this spark plug is suitable for a variety of 4-cycle engines requiring moderate heat dissipation.

Applications and Common Issues Addressed

• Restores proper ignition in engines experiencing misfires or rough idling
• Improves fuel efficiency by ensuring consistent spark delivery
• Reduces electromagnetic interference with 6000 ohm resistance
• Prevents electrode wear and corrosion in standard ignition systems
• Compatible with vehicles requiring a 14 mm thread diameter and 12.7 mm reach spark plug

Installation Notes and Tips

• Verify compatibility with your vehicle’s make and model before installation
• Use a 20.8 mm socket wrench for proper tightening
• Check and adjust the pre-gap to 0.8 mm if necessary before installation
• Ensure the flat seat type matches the engine’s cylinder head design
• Torque to manufacturer specifications to avoid damage or poor sealing

Quality Assurance and Warranty

Bosch manufactures the Nickel Spark Plug 7997 to meet strict quality standards, ensuring consistent performance and durability. The spark plug includes a resistor to minimize radio frequency interference, supporting vehicle electronics. While specific warranty details depend on the vehicle manufacturer or installer, Bosch products typically come with a limited warranty against manufacturing defects.