Champion QL78YC Marine Spark Plug | #938S Shop Pack | 24-Count | Long-Reach 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 — QL78YC in a 24-Count Shop Pack.
The Champion #938S Shop Pack gives you 24 QL78YC marine spark plugs in a single purchase — the same plug as the Champion #938M 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 QL78YC is a long-reach, projected-tip marine spark plug for 4-stroke outboard engines, featuring a standard ground electrode with resistor construction for RFI suppression. At 24 plugs per pack, the per-plug cost is significantly lower than buying individual 4-packs.
Key Features
- Champion QL78YC marine spark plug — 24-count shop pack (Champion #938S)
- Same plug as the #938M 4-Pack — bulk quantity for service shops and multi-vessel owners
- Long-reach QL-series thread with projected tip — for 4-stroke outboard engines requiring deeper plug engagement
- Standard ground electrode with resistor construction for RFI suppression
- Designed for 4-stroke marine outboard applications
Compatible Applications
- Evinrude and Johnson 4-stroke outboard engines specifying Champion QL78YC or equivalent
- Mercury and Mariner 4-stroke outboard engines specifying Champion QL78YC or equivalent
- Marine service shops and dealers performing high-volume 4-stroke outboard tune-ups
- Boaters servicing multiple 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 4-stroke outboards specifying the QL78YC. Having a full box on hand means you're never waiting on a parts order mid-service, and 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 QL78YC #938M 4-Pack is the right quantity. For Mercury 4-stroke outboards specifying the 4-ground-electrode plug, see the Champion QL77JC4 #828M or the Champion QL77JC4 #828S Shop Pack.
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.