NGK 5847 LKR7B-9 Standard Copper Core Spark Plug, 12mm, Heat Range 7

The NGK 5847 (LKR7B-9) Standard spark plug is an OE-quality replacement ignition spark plug. It has a nickel alloy center electrode and a copper core, and it is built for dependable starting and smooth engine performance. NGK is a major OE supplier of spark plugs, and the Standard line is made to original equipment standards.

Key Features:

• Solid copper core improves heat dissipation and conductivity across a wide heat range
• Nickel alloy center and ground electrodes
• High-grade alumina silicate ceramic insulator for strong dielectric performance
• Triple gasket sealing helps prevent combustion gas leakage
• Trivalent metal plating resists corrosion and seizing, so the plug installs and removes more easily
• Cold-rolled threads help prevent cross-threading and cylinder head damage
• Resistor design (5k ohm) suppresses radio interference

Specifications:

• NGK part number: 5847 (stock number); service number LKR7B-9
• Thread size: M12 x 1.25 (12 mm)
• Reach: 26.5 mm (1.043 in.)
• Hex size: 5/8 in. (16 mm)
• Seat type: Gasket (flat) seat with crush washer
• Heat range: 7
• Pre-set gap: 0.036 in. (0.9 mm)
• Terminal: Solid, non-removable nut
• Ground electrode: 1, J-gap style
• Center electrode projection: Projected, with insulator tip projection of 3.0 mm
• Resistor: Yes, 5k ohm

Cross References: 1822A036, B2401-6A00F, A 132 159 00 03, Denso XU22HDR9.

Always check and set the gap to your engine's specification before installation. Tighten to the recommended torque of 10.8-18 lb-ft in cast iron heads or 10.8-14.5 lb-ft in aluminum heads.