Hitachi
Hitachi 6685780 NGK BPM7A Spark Plug
★★★★★
Genuine OEM spark plug replacement keeps your Hitachi and Tanaka outdoor power equipment firing reliably season after season.
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Overview
Reliable Ignition for Your Outdoor Equipment
Introducing the Hitachi 6685780 Spark Plug. This genuine Hitachi replacement part ensures reliable ignition for your outdoor power equipment. Designed for use with Hitachi/Tanaka branded products, this spark plug delivers consistent performance and durability.
Specifications
- Brand: Hitachi
- Model: 6685780
- Type: Spark Plug
- Core Material: Nickel
- Thread Size: 14mm
- Vehicle Service Type: Lawn Mower
Key Features
Genuine Hitachi outdoor power equipment replacement part
For use on Hitachi/Tanaka branded outdoor power equipment products
90 day warranty
Pros & Cons
👍 Pros
- Genuine OEM part ensures verified compatibility with Hitachi and Tanaka outdoor power equipment without guessing on fitment
- Nickel core electrode provides reliable ignition and reasonable service life for seasonal small-engine use
- Cross-references to the widely available NGK BPM7A, making future replacements easy to source from multiple suppliers
- Standard 14mm thread and common hex size mean no specialized tools are needed beyond a basic spark plug socket
👎 Cons
- 90-day warranty is shorter than what some aftermarket spark plug brands offer for equivalent parts
- Nickel electrode construction has a shorter service life than iridium or platinum alternatives available in the BPM7A form factor
- Sold as a single plug, so there is no multi-pack discount for users maintaining multiple pieces of equipment
- Electrode gap may need manual adjustment out of the box depending on your specific engine's requirements
Frequently Asked Questions
What Hitachi and Tanaka equipment models is this spark plug compatible with?
This is a genuine Hitachi replacement part (model 6685780) cross-referenced to the NGK BPM7A, designed for Hitachi and Tanaka branded outdoor power equipment including trimmers, chainsaws, and blowers. Check your equipment's owner manual for the specified spark plug model to confirm fitment before ordering.
How often should this spark plug be replaced in regular-use outdoor power equipment?
For most small two-stroke and four-stroke engines used in outdoor power equipment, spark plug replacement is recommended every 100 hours of operation or once per season, whichever comes first. If you notice hard starting, rough idle, or reduced power, inspect and replace the plug sooner.
What is the thread size and gap specification for this spark plug?
This plug uses a 14mm thread. For the correct electrode gap, refer to your specific equipment's manual, as gap specifications vary by engine model. Most small engines using the BPM7A call for a gap between 0.6mm and 0.7mm. Always verify and adjust the gap before installation.
Can I use a standard NGK BPM7A in place of this Hitachi-branded plug?
Yes, this is functionally an NGK BPM7A spark plug supplied as a genuine Hitachi part. A standard NGK BPM7A from any supplier will have identical specifications and performance. The Hitachi part number ensures compatibility verification for warranty purposes on Hitachi/Tanaka equipment.
What tools are needed to install this spark plug?
You will need a spark plug socket wrench — typically 3/4-inch (19mm) for the BPM7A hex size — and a gap gauge tool. Disconnect the spark plug wire before removal, and torque the new plug to your engine manufacturer's specification to avoid thread damage or compression leaks.
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