Champion RA8HC Marine Spark Plug | #810 | 4-Pack | Short-Reach 2-Stroke Outboard
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Short-Reach Non-Resistor Marine Spark Plug for 2-Stroke Outboards — 4-Pack.
The Champion RA8HC is a short-reach, non-resistor marine spark plug designed for 2-stroke outboard engines and small marine engines that specify a half-reach, 14mm plug. Part number 810, the RA8HC features a copper core electrode for reliable heat transfer and consistent spark, without a built-in resistor — making it the correct choice for engines that specifically require a non-resistor plug.
Sold in a 4-pack (Champion part 10388). Always verify fitment against your engine's owner's manual or Champion application guide before ordering — thread reach is critical and must match your engine's specification.
Key Features
- Champion RA8HC marine spark plug — 4-pack (Champion #810)
- Short (half) reach, 14mm thread — for engines requiring a compact plug engagement depth
- Non-resistor design — for engines that specifically require a non-resistor spark plug
- Copper core electrode for reliable heat transfer and consistent spark
- Designed for 2-stroke marine outboard and small engine applications
Compatible Applications
- Older Mercury and Mariner 2-stroke outboard engines specifying Champion RA8HC or equivalent
- Evinrude and Johnson 2-stroke outboard engines specifying Champion RA8HC or equivalent
- Small 2-stroke marine engines requiring a short-reach, non-resistor 14mm spark plug
- Any application cross-referencing Champion #810 or part 10388
- Verify fitment using your engine's owner's manual or the Champion spark plug application guide
Parts Desk Insights
The RA8HC is a legacy marine plug that remains in production because of the large installed base of older 2-stroke outboards that specify it. If your engine manual calls for an RA8HC, this is the correct part — the short reach and non-resistor design are both engine-specific requirements that shouldn't be substituted without confirming compatibility. Using a long-reach plug in a short-reach application can cause piston contact and serious engine damage.
For long-reach 2-stroke outboard plugs, see the Champion QL82C #931M or Champion QL86C #933M. For standard-reach 2-stroke marine plugs, see the Champion L76V #827M or Champion L78V #833M.
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 3–4 business days.
Special-order items: timeline confirmed after order.
Returns & warranty
Returns & Satisfaction Guarantee
We stand firmly behind the quality of every product we sell. Your confidence matters to us — and we back it with a straightforward 30-Day Satisfaction Guarantee.
If you are not fully satisfied, you may request a return within 30 days of delivery. All returns must receive pre-approval prior to being sent back. Unauthorized returns will not be accepted.
To qualify for a return:
Item must be in new, unused condition
Product must be in its original packaging
All parts, components, hardware, manuals, and accessories must be included
Packaging must be undamaged and suitable for resale
Important:
Electronics are strictly inspected. No returns on open-box electronics. Exceptions may apply only with prior written approval. Any electronic unit that has been installed, powered, activated, or altered may not be eligible for return.
We are serious about product integrity — and equally serious about taking care of our customers. If there is ever a product issue, contact us immediately so we can make it right.
For return authorization, please contact our support team before shipping anything back.