Autolite 2554 spark plug for the Homelite ZR trimmer and other equipment lights the fuel mixture in the engine's cylinder.
- Autolite Copper spark plug, engineered for quick starts and the power your equipment needs
- Copper core center electrode aids thermal control and improves resistance to fouling
- High nickel alloy center and ground electrode for extended life
- High alumina multi-rib ceramic insulator for thermal conductivity and insulation, with increased strength
- Nickel-plated shell that resists corrosion for increased durability
Hard starting, a rough idle or a misfire can mean a worn or fouled plug, but fuel and ignition faults cause the same signs, so find the cause first. With the engine off and cool, a look at the old plug's electrode and ceramic tip is a sensible first check.
This plug is listed for a wide range of Homelite, McCulloch, Dolmar and Toro equipment, including the Homelite Backpacker blower and the Homelite BP250, BX90 blower. Each machine takes one plug. If your machine isn't named here, look it up in the "Vehicles it fits" section before you order.
Specifications
Fit and size
- Quantity per application: 1
- Thread size: M14 - 1.25 (metric), 14 mm thread diameter
- Hex size: 5/8 in
- Seat type: Tapered
- Manufacturer heat range: 9
- Center electrode projection: Mid projection
- Insulator tip projection: 3.2 mm (0.126 in)
Build and materials
- Type: Copper spark plug
- Center electrode: copper core, nickel tip
- Ground electrode: nickel core, nickel tip
- Insulator: ceramic
- Terminal: non-removable nut
- Skirt: yes
- Warranty: Autolite 2 year limited warranty
- Country of origin: China
In the box
One spark plug. A washer is not included.
Interchange: DJ6J (EZ) · T20MP-U
855 · 872 · 8721 · DJ7Y · RDJ7Y · 6040 · 1270 · BPM6F · BPMR6F · N6RTC · N6TC
Product information is for general reference and may contain errors. See our Disclaimer.
This part cross-references / interchanges with the following part numbers:
855, 872, 8721, DJ6J (EZ), DJ7Y, RDJ7Y, 6040, T20MP-U, 1270, BPM6F, BPMR6F, N6RTC, N6TC
Frequently Asked Questions
Does the Autolite 2554 spark plug fit the Homelite ZR trimmer?
Yes. Autolite 2554 is listed for the Homelite ZR Series trimmers, such as the z625cd, and each machine takes one plug.
Does the Autolite 2554 come with a washer?
No. This listing is one spark plug, and a washer is not included.
What heat range are these Autolite copper spark plugs?
The Autolite 2554 has a manufacturer heat range of 9. It has a 5/8 inch hex, a tapered seat and an M14 - 1.25 thread.
What are the signs the electrodes on this spark plug are worn?
Hard starting, rough running or a visibly eroded electrode on the old plug, looked at with the engine off and cool, can mean the plug is worn.
What is the 2554 spark plug made of?
This plug has a copper core center electrode with a nickel tip, a nickel ground electrode, a ceramic insulator and a nickel-plated shell.
