Champion QL86C Marine Spark Plug | #933M | 4-Pack | Long-Reach 2-Stroke Outboard
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Hotter Long-Reach Non-Resistor Marine Spark Plug for 2-Stroke Outboards — 4-Pack.
The Champion QL86C is a long-reach, non-resistor marine spark plug designed for 2-stroke outboard engines that run cooler or at lower average RPM. Part number 933M, the QL86 runs one heat range hotter than the QL82C — helping to burn off carbon deposits and maintain a clean electrode on engines that don't generate enough heat to self-clean a cooler plug.
The C-suffix indicates a non-resistor design with a copper core electrode, making it the correct choice for engines that specifically require a non-resistor plug. The QL-series long-reach thread is engineered for outboard combustion chambers requiring deeper plug engagement. Sold in a 4-pack (Champion part 12214). Always verify fitment against your engine's owner's manual or Champion application guide before ordering.
Key Features
- Champion QL86C marine spark plug — 4-pack (Champion #933M)
- Hotter heat range than the QL82C — suited for cooler-running or lower-RPM 2-stroke outboard applications
- Long-reach QL-series thread — for outboard engines requiring deeper plug engagement
- Non-resistor design — for engines that specifically require a non-resistor spark plug
- Copper core electrode for reliable heat transfer and consistent spark
Compatible Applications
- Evinrude and Johnson 2-stroke outboard engines specifying Champion QL86C or equivalent
- Cooler-running or lower-average-RPM 2-stroke outboard engines where a hotter plug is specified
- Long-reach, non-resistor 2-stroke applications cross-referencing Champion #933M or part 12214
- Verify fitment using your engine's owner's manual or the Champion spark plug application guide
Parts Desk Insights
The QL86C is the hotter alternative to the Champion QL82C #931M in the non-resistor long-reach family. A hotter plug is appropriate when your engine runs cool — typically lower-horsepower or trolling-speed applications — and you're seeing carbon fouling on the electrode. If your engine specifies the QL86C, use the QL86C; don't substitute a cooler plug thinking it's safer, as a plug that's too cold will foul quickly.
If your engine requires a resistor plug in this heat range, check the Champion QL82YC #932M. For other long-reach QL-series options, see the Champion QL16V #876M or the Champion QL77JC4 #828M for 4-stroke applications.
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
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