Copper Plus Spark Plug 415, Type RN9YC
These Champion Spark Plugs deliver a consistently focused spark with minimum RF interference.
Plugs you can count on, the Champion Spark Plugs we offer boast all the features that make Champion an industry leader. Plugs feature a triple-coated shell for excellent corrosion resistance, and a triple seal assembly that is the strongest in the industry. Precision rolled threads conform to all manufacturers’ specifications.
- Triple-coated shell offers excellent corrosion resistance
- Triple-seal assembly is strongest in industry
- Precision-rolled threads conform to all manufacturer’s specs
- "Q" and "R" plug types offer Radio Frequency Interference (RFI) suppression to protect sensitive electronics
- Available for inboard, I/O and outboard motors and personal watercraft
- Made in U.S.A.
The Champion Spark Plugs that we offer that begin with the letters "Q" and "R" include RFI suppression, so they won’t affect your radio or navigation equipment. R-type plugs include Champion's SAC-9 RFI suppressor, which is a resistor made of strontium carbonate, aluminum oxide and copper oxide powders.
Q-type plugs limit RFI with an inductive suppressor, which consists of a wire wound inductive coil that reduces RFI without negatively affecting ignition performance. Q-type suppressor plugs are specified for most Evinrude and Johnson outboard engines with CD ignition. Usage of non-Q types (or standard resistor plugs) can actually cause engine misfire and a loss in performance.
To ensure optimum performance please consult your owner's manual to determine the correct spark plug for your engine.
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