NGK CR8EB Spark Plug | #7784 | 4-Pack | Kawasaki Jet Ski & Personal Watercraft
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Compact Resistor Spark Plug for Personal Watercraft Engines — 4-Pack.
The NGK CR8EB is a compact 10mm resistor spark plug designed for personal watercraft (PWC) engines, including Kawasaki Jet Ski and compatible applications. Part number 7784, the C-series 10mm thread design is engineered for the tight combustion chamber geometry of high-revving PWC engines, where a standard 14mm plug simply won't fit.
The projected tip (B-suffix) improves ignitability in the compact combustion chamber, while the built-in resistor suppresses radio frequency interference — important in watercraft where electronics and communication equipment are in close proximity. NGK's triple gasket sealing process eliminates combustion gas leakage, and cold-rolled threads protect the cylinder head on installation.
Sold in a 4-pack. Always verify fitment against your engine's owner's manual or NGK application guide before ordering.
Key Features
- NGK CR8EB spark plug — 4-pack (NGK #7784)
- Compact 10mm C-series thread — for PWC and small-bore engines requiring a 10mm plug
- Projected tip (B-suffix) for improved ignitability in compact combustion chambers
- Built-in resistor suppresses radio frequency interference (RFI)
- Solid copper core for reliable heat transfer and consistent spark
- Triple gasket sealing eliminates combustion gas leakage past the shell
- Cold-rolled threads protect cylinder head threads on installation
- Trivalent plating (silver chromate and zinc) for corrosion resistance
Compatible Applications
- Kawasaki Jet Ski personal watercraft engines specifying NGK CR8EB or equivalent
- Other personal watercraft engines requiring a compact 10mm resistor plug cross-referencing NGK #7784
- Small-bore 2-stroke or 4-stroke engines specifying CR8EB or equivalent
- Verify fitment using your engine's owner's manual or the NGK spark plug application guide
Parts Desk Insights
The CR8EB is the correct plug for Kawasaki Jet Ski and compatible PWC engines that specify the compact 10mm C-series thread — this is not interchangeable with a standard 14mm plug. PWC engines run at very high RPM and are sensitive to plug condition, so replacing plugs at the manufacturer's recommended interval (typically annually or every 50–60 hours) is more important on a PWC than on a lower-revving outboard engine.
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For other NGK spark plug options for marine and PWC applications, browse our Ignition Components collection. For Honda and Yamaha outboard plugs, see the NGK DCPR6E #3481.
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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