Champion QL77JC4 Marine Spark Plug | #828S Shop Pack | 24-Count | Mercury 4-Stroke Outboard
Free returns on all eligible orders
You have 30 days to request a return. All sale items are final sale.
Stock Up for the Season — QL77JC4 in a 24-Count Shop Pack.
The Champion #828S Shop Pack gives you 24 QL77JC4 marine spark plugs in a single purchase — the same plug as the Champion #828M 4-Pack, in a bulk quantity designed for marine service shops, dealers, and boaters who service multiple vessels or want to stock up for the season.
The QL77JC4 is one of the most widely specified marine spark plugs for Mercury 4-stroke outboard engines, featuring four ground electrodes around a fine-wire centre electrode for consistent spark initiation, improved ignitability, and longer service life. At 24 plugs per pack, the per-plug cost is significantly lower than buying individual 4-packs.
Key Features
- Champion QL77JC4 marine spark plug — 24-count shop pack (Champion #828S)
- Same plug as the #828M 4-Pack — bulk quantity for service shops and multi-vessel owners
- Four ground electrodes for consistent spark initiation and improved ignitability
- Fine-wire centre electrode for reduced voltage requirement and longer service life
- Long-reach QL-series thread with projected tip — engineered for Mercury 4-stroke outboard combustion chambers
- Resistor construction suppresses radio frequency interference (RFI)
Compatible Applications
- Mercury 4-stroke outboard engines specifying Champion QL77JC4 or equivalent
- Applications cross-referencing Mercury OEM spark plug part 896329828
- Marine service shops and dealers performing high-volume Mercury 4-stroke outboard tune-ups
- Boaters servicing multiple Mercury 4-stroke outboards or stocking for the full season
- Verify fitment using your engine's owner's manual or the Champion spark plug application guide
Parts Desk Insights
The shop pack is the right buy for any marine service operation that regularly tunes Mercury 4-stroke outboards — the QL77JC4 is one of the highest-volume plugs in the Mercury 4-stroke lineup, and having a full box on hand means you're never waiting on a parts order mid-service. The per-plug cost at 24 count is meaningfully lower than buying 4-packs individually.
If you only need plugs for a single engine service, the Champion QL77JC4 #828M 4-Pack is the right quantity. For the NGK equivalent, see the Quicksilver NGK Iridium Spark Plug Set.
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.