Description
The Champion Copper Plus Spark Plug RJ19HX is a dependable OE-type replacement spark plug designed for reliable ignition performance, solid heat control, and long service life in small engine applications. Built with Champion’s proven Copper Plus design, this plug helps support dependable starts, resist fouling, and maintain consistent overall wear in lawn and garden equipment.
Its copper core construction helps provide accurate heat range control for longer life, while the flat seat, crush washer, and resistor design support proper fit and dependable operation. Built to ISO and SAE standards, the RJ19HX is a trusted replacement choice for walk-behind mowers and other outdoor power equipment that require durable, OE-style spark plug performance.
Features
- Part number: 973
- Plug type: RJ19HX
- OE-type replacement spark plug
- Champion Copper Plus design for dependable performance and durability
- Helps resist fouling for reliable operation
- Copper core center electrode allows accurate heat range control for longer life
- Superior corrosion resistance
- Built to ISO and SAE standards for proven performance
- Center electrode tip material: Nickel
- Ground electrode tip material: Nickel
- Ground electrode core material: Nickel
- Ground electrode material: Nickel Copper Alloy
- Ground electrode quantity: 1
- Pre-gap size: 0.030 in / 0.75 mm
- Hex size: 0.813 in / 20.650 mm
- Insulator height: 0.03 in
- Manufacturer heat range: 19
- Seat type: Flat
- Reach: 0.375 in
- Thread diameter: 14.000 mm / 0.551 in
- Resistor type: Yes
- Washer included: Yes
- Washer type: Crush
- Classification: Champion Copper Plus Small Engine
- Grade type: Standard Replacement
- Electrical terminal type: Non-Removable Nut
- Hex type: Hex
- Center electrode design: Standard
- Indexed: No
- Part description: Spark Plug
- Center electrode diameter: 0.052 in
- Installed height: 1.84 in
- Insulator projection: 0.03 in
- Taper diameter: 0.31 in
- Subject to Prop 65: No
Equipment Fitment
Briggs & Stratton
- Base
- Base
- Base
- Base
- Base
- Base
- Base
- Base
- Base
Craftsman
- 917.361371
- 917.371140
- 917.371150
- 917.374043
- 917.374061
- 917.374091
- 917.374103
- 917.374366
- 917.374941
- 917.374951
- 917.375012
- 917.376232
- 917.376240
- 917.376393
- 917.376401
- 917.376531
- 917.376590
- 917.388111
- 917.389011
- 917.389020
- 917.389050
- 917.389061
- 917.4787A
- 917.4789A
- 944.360040
- 944.364330
- 944.364372
Husqvarna
Solo
- 546 R
- 546 RS
- 550 RS
- 582 SM