ACDelco 41-983 Dual Platinum Spark Plug — 8-Pack | GM V8 Marine Engines
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You have 30 days to request a return. All sale items are final sale.
ACDelco Dual Platinum Spark Plugs for GM V8 Marine Engines
The ACDelco 41-983 Dual Platinum spark plug delivers reliable, long-life ignition performance for GM V8-based marine engines. The dual platinum electrode design — platinum on both the center and ground electrodes — provides consistent spark and extended service life compared to standard copper plugs. Sold as an 8-pack, making it a complete set for a full V8 engine tune-up.
Compatible Applications
- GM V8-based marine engines requiring ACDelco 41-983 spark plug
- MerCruiser, Crusader, and Indmar engines using GM V8 blocks — verify OEM plug number before ordering
Key Features
- Dual platinum electrodes — platinum on center and ground electrode for extended wear resistance
- Consistent spark output across a wide RPM range
- Longer service life than standard copper plugs
- 8-pack — complete set for a full V8 engine
Parts Desk Insights
The ACDelco 41-983 is the dual platinum option for GM V8 marine engines — a solid choice for owners who want a meaningful upgrade over copper plugs without stepping up to iridium. The 8-pack format is purpose-built for V8 applications, so you get a full engine set in one order. On the water, platinum plugs offer better fouling resistance than copper in the lower-RPM, variable-load conditions common in marine use. Always verify the correct plug number for your specific engine before ordering — GM marine engines can use different heat ranges depending on the application. For the iridium upgrade option for GM marine engines, see the ACDelco 411104 Iridium Spark Plug. Pair with a quality spark plug wire set for a complete ignition service, such as the Sierra Marine Spark Plug Wire Set.
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 1-3 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.